Ocean and Sea Ice SAF CDOP-2 Product Requirement Document · Final PRD of CDOP-1 approved by SG...

Ocean & Sea Ice SAF CDOP-2 Product Requirement Document

SAF/OSI/CDOP2/M-F/MGT/PL/2-001 - 1 - osisaf_cdop2_gen_prd_3_7

Ocean and Sea Ice SAF CDOP-2

Product Requirement Document

Version : 3.7 Date : 7 November 2016 Prepared by DMI, IFREMER, KNMI, Météo-France and MET Norway Reviewed by OSI SAF Project Manager Approved by OSI SAF Steering Group



DOCUMENTATION CHANGE RECORD

Issue / Revision

Date : Change description :

1_0_draft_a

22 April 2008

Initial draft version for submission to CDOP SG03.

1_0 29 may 2008

Version as revised and approved at SG03.

1_1_draft_a

6 January 2009

Modifications in § 6.3 concerning the Sea Ice products, in particular Sea Ice Drift products are proposed to be split between Low resolution (osi-405) and medium resolution (osi-407) products.

1_1 15 January 2009

Version as revised and approved at SG04.

1_2_draft_a

20 May 2009

Re-numbering of the requirements in order to allow new requirements to be included. New requirements included :

- §6.3 : OSI-PRD-PRO-205 : The OSI SAF shall reprocess the time series of SMMR and SSMIS data back to 1978 to expand the time series of global sea ice products.

- §6.3 : OSI-PRD-PRO-206 : The OSI SAF shall test new methods for ensuring a climate consistent data set.

- §6.3 : OSI-PRD-PRO-207 : The OSI SAF shall improve the coverage of the existing sea ice concentration, edge and type products by adding interpolation in the coastal zone and the area close to the pole where there are no satellite data coverage (Action OSI-CDOP-SG03-09).

- §6.1 : OSI-PRD-PRO-1 : GBL SST (OSI-201) and NAR SST (OSI-202) shall be delivered in NetCDF L3P core. (Action OSI-CDOP-SG04-05).

- §6.4 : OSI-PRD-PRO-300 : SeaWinds 25km Winds (OSI-101), SeaWinds 100km Winds (OSI-102), ASCAT 25km Winds (OSI-101), and ASCAT 12.5 km Winds (OSI-103) shall be delivered in NetCDF.

Modifications (Action OSI-CDOP-SG04-08) :

- §6.1 : ATL SST (OSI-206) split into MET SST (OSI-206) and GOES-E SST (OSI-207), with extended area,

- §6.2 : ATL DLI (OSI-303) split into MET DLI (OSI-303) and GOES-E DLSI (OSI-305), with extended area and resolution improved at 0.05° lat-lon,

-§6.2 : ATL SSI (OSI-304) split into MET SSI (OSI-304) and GOES-E SSI (OSI-306), with extended area and resolution improved at 0.05° lat-lon. Other modifications : - §6.3 : Global Sea Ice Concentration (OSI-401) split into Global Sea Ice Concentration (OSI-401) derived from SMM/I and SSMIS, and Global AMSRE Sea Ice Concentration (OSI-408).

1_2_draft_b

22 June 2009

- §6.3 : Global reprocessed Sea Ice Concentration Data set OSI-409 added.



1_2_draft_c

03 September 2009

-§ 6.4.: OSI-PRD-PRO-301 to OSI-PRD-PRO-306 requirements have been modified in order to clarify the distinction between the requirements of BUFR and NetCDF products.

1_2 03 September 2009

Version approved by SG.

1_3_draft_a

30 May 2011

UMARF replaced by EUMETSAT DATA CENTRE (EDC). Following OR7-action3 :

- Access through NAIAD; OSI-PRD-GEN-403, table 6.1 (OSI-204) and table 6.4 (OSI-102) updated,

- New requirement OSI-PRD-PRO-208 added 1_3 07 June

2011 Same as version 1_3_draft_a, approved by SG.

1_4_draft_a

11 October 2011

- Section 6.3 : OSI-409 reprocessing time period specified (1978-2009).

1_4 11 October 2011

Same as 1_4_draft, version approved by SG.

1_5_draft_a

28 February 2012

Following action SG08-act10 and 2012 HL Sea Ice Review : - OSI-PRD-PRO-200, updated for OSI-404 and OSI-406, - OSI-PRD-PRO-209 added, - OSI-PRD-PRO-210 added.

1_5_draft_b

15 March 2012

Following decision OSI-CDOP-SG07-08, dissemination of MGR SST (OSI-204) via EUMETCast added in section 6.1. Following CDOP-1 close out SG meeting, modifications were made in tables of section 6 as following:

- OSI-408 (Global AMSR Sea Ice Concentration) removed due to lack of satellite data in the timeframe of CDOP-1. Note: The development of Global AMSR Sea Ice Concentration is planned to resume in CDOP-2, based on japanese satellite GCOM-W.

- Use of SSMI/S removed for Sea Ice products OSI-401, -402,

-403, -404, -405. Notes: 1) There was no commitment in CDOP-1 Project plan for developing the use of SSMI/S for OSI-405. 2) Use of SSMI/S for OSI-401, -402, -403, -404 is backlogged to CDOP-2.

- Use of NPP/VIIRS removed for SST products OSI-202, OSI-

203, and for Sea Ice product OSI-406. Notes: 1) There was no commitment in CDOP-1 Project plan for developing the use of NPP/VIIRS for OSI-203 and OSI-406. 2) Use of NPP/VIIRS for OSI-202 is backlogged to CDOP-2.

- Column “expected start of operation resp. availability” no longer considered as relevant and removed.

1_5 15 March 2012

Final PRD of CDOP-1 approved by SG (identical to 1_5_draft_b)

2_0_draft_a

28 August 2012

First draft submitted to CDOP-2 SG. This version is an evolution of CDOP-1 PRD. It takes into account CDOP-2 proposal, and also the more recent context. Main changes are :

- OSI-PRD-PRO-300 : CFOSAT, HY-2 and Meteor-M wind products added (products osi-106, 107, 108)

- OSI-PRD-PRO-300 : Metop-B ASCAT 12.5 km product( osi-



103-b) removed. (due to EUMETSAT operational dissemination of the full resolution data the coastal product will become fully operational, making the 12.5 km useless)

- OSI-PRD-GEN-500 and OSI-PRD-PRO-1 : Clarification of SST coverage over High Latitudes for Sea Ice product osi-203-x

- OSI-PRD-PRO-300 : Minor changes requested by OSCAT PCR.

- Table in §1.4 updated

2_1_draft_a

12 October 2012

OSI-PRD-GEN-201 and WUS-1 modified [see df01 and df04 requests] OSI-PRD-GEN-404/305/306/307 indicated as obsolete [see df03 request] OSI-PRD-PRO-200 modified for OSI-430 product (“Daily product with maximum one month delay “added).

2_1_draft_b

OSI-107 product removed Requirement on lake surface temperature added OSI-PRD-GEN-401 extended to “other agreed formats and dissemination means required by substantial users communities “. “Spatial Resolution” replaced by “spatial sampling” in tables of sections 6.1, 6.2, 6.3, 6.4. Chapter 2 wording improved to better take into account key application areas of OSI SAF products (marine meteorology, NWP etc…). A reference to some users requirements sources has been added. Remarks added (section 8).

2_1 Approved at CDOP-2 SG02 meeting on 25 October 2012. 2_2_draft_a

12 Feb 2013

Introduced OSI-401-a, OSI-402-a, OSI-403-a, OSI-405-a, the SSMIS based products superseding the SSM/I based products.

2_2 15 Feb 2013

Same as version 2_2_draft_a, approved by CDOP-2 SG members on 15 February 2013.

2_3_draft_a

16 October 2013

Temporal averaging period of the wind and sea ice products requirements added following OR-9 action 8 (i.e. CDOP-2 SG03 action 10). Taking into account the multi-year ice area for the OSI-403 products regarding the CDOP-2 SG03 action 6). TBDs in the different tables deleted when it is possible following OR-9 action 9 (i.e. CDOP-2 SG03 action 11). Other minor changes.

2_3_draft_b

22 October 2013 25 October 2013

Resolution of SeaWinds reprocessed products is 25 + 50 km rather than 25 + 100 km Addition of the interaction with ESA CCI project for the product OSI-450, see * at the end of the sea ice products table.

2_3 18 November 2013

Same as version 2_3_draft_b, approved by CDOP-2 SG members on 05 November 2013.



2_4_draft_a

28 November 2013 13 December 2013

Removal of the number of users and countries in the column “Application and main users” from all products tables. Addition of the OSI-404a, OSI-406a, OSI-407a and OSI-408a products in the Sea Ice products table. Some pieces of information added concerning availability of sensors for Sea Ice products OSI-402b, OSI-403b and OSI-405b. Removing of the TBD and other minor changes in the Sea Ice products table.

2_4 15 January 2014

Same as version 2_4_draft_a, approved by CDOP-2 SG members on 06 January 2014.

2_5_draft_a

16 January 2014

Added OSI-409a product in the sea ice table. Added remarks and updated text in the sea ice products table, according to PCR review.

2_5_draft_b

28 January 2014

Added remarks and updated text in the wind products table, according to RR+PCR review. OSI-PRD-GEN-100 extended to : “Nominal quality data are defined as input data that successfully pass all input data tests in the OSI SAF processing.

2_5 04 February 2014

Same as version 2_5_draft_a, approved by CDOP-2 SG members on 03 February 2014.

2_6_draft_a

05 February 2014

Removing of the TBDs for Metop-A IASI SST product.

2_6 28 May 2014

Same as version 2_6_draft_a, approved by CDOP-2 SG members on 28 May 2014 at DMI.

3_0_draft_b

19 September 2014

Updated version taking into account actions from OSI SAF MTG Requirements Review : RID #001 : requirements about product formats and dissemination (formerly OSI-PRD-GEN-400 to 403) re-formulated to avoid ambiguity. The baseline for OSI SAF MTG products format is netCDF only. RID #004 : threshold, target and objective accuracies provided for daily radiative fluxes products. RID #008 : SAF Level 2 Products Generation and Dissemination Baseline for MTG [AD-6] added as an applicable document. RIDs #008, #020 and #023 : end-to-end timeliness of MTG products (OSI-206b, OSI-303b and OSI-304b) aligned with L2SAF document [AD.6], and information on production frequency added in product tables. End-to-end timeliness definition provided as a note in section 5.2.



RID #009 : applicable documents [AD-3] and [AD-4] updated. RID #021 : optimal bias requirement for SST products changed from 0° to 0.1° C RID #003 : MTG Mission requirements document [previous AD-6] removed from applicable documents Acronym GCOS added in 1.4

3_0_draft_d

31/10/2014 Update of wind products

3_0_draft_e

05/11/2014 Add of OSI-112 (ScatSat winds)

3_0_draft_f

12/11/2014 Updated version taking into account recommendation R1 from OSI SAF MTG Requirements Review : RID #025 : a requirement has been added, stating that the operational status of a product is based on the threshold value of the accuracy requirements (OSI-PRD-GEN-101)

3_0_draft_g

01/12/2014 Updated version after SG06 (Actions OSI-CDOP2-SG06-12 and OSI-CDOP-2-SG06-04) : - Refine the requirements for OSI-450 to document added value from the ESA CCI contributions (6.3). - Acronym ESA and CCI added in 1.4 - 12km spatial sampling added for OSI-109 - L3 removed from OSI-150, OSI-151, OSI-152, OSI-153 wind products Update of Sea Ice products : - OSI-403-b and OSI-402-b : AMSR-2 and OceanSat-2 removed from input + expected operational date advanced to 2015 - OSI-405b : OceanSat-2 removed from input + expected operational date postponed to 2015 - Add of OSI-402-c, OSI-403c (both with AMSR-2) and OSI-405-c (uncertainties) - OSI-406-a operational date postponed to 2015 - Add of SSM/I in OSI-PRD-PRO-205

3_0_draft_h

19/12/2014 OSI-204 : data center removed from dissemination means (this was a mistake) For OSI-203b and OSI-205 PCR, IST accuracy (Threshold, Target and Optimal) added.



3_0_draft_i

05/01/2015 - OSI-203 (AHL SST) corrected (operational and without SIST), grib format added. - New line for OSI-203-a - OSI-205 (FRN SST) corrected (not operational and includes SIST) - removed OSI-205-d and corrected OSI-205 b and c, so now in line with OSI-203 b and c. - corrected some expected dates - added IR radiometer in validation method - section 6.3 : correction of some of the footnotes, as well as removing footnote 4, which is no longer valid. Footnote 2 is removed from OSI-403 and put in the header. Footnote (1) is put in OSI-403 validation method column.

3_0_draft_j

15/01/2015 IST changed to SIST SIST and SSIST added in the acronyms list. Changed names and acronyms of OSI-203-x and OSI-205-x products : OSI-203 serie renamed from NHL SST to NHL SSIST (to become HL SSIST in the next evolutions) OSI-205 serie renamed from FRN SST to L2 SSIST. Reformulated Characteristics and Validation columns for OSI-203-x and OSI-205-x products : OSI-203 serie and OSI-205 serie : Characteristics and methods, verification/validation methods columns completed with SIST parameters (recommended in OSI SAF RR OSI-203-a and OSI-205 SST and SIST products Minutes : EUM/TSS/MIN/15/789846)

3_0 23/01/2015 OSI-109 : 12km spatial sampling corrected to 50km Version approved by e-mail by the SG on the 23/01/2015



3_1 draft a

02/02/2015 Modifications related to OSI-151 DRR (January 2015) : - product renamed from ‘Reprocessed QuikSCAT L2 Winds’ to ‘Reprocessed SeaWinds L2 25 km and 50 km winds’. - ‘Wind speed stability better than 0.1 m/s in 10 years’ added in Target accuracy. OSI-105 : ‘EUMETcast’ removed as dissemination mean as product is discontinued since 20 February 2014. Archive available OSI-305-b (DLI based on GOES-R), OSI-306-b (SSI based on GOES-R), OSI-207-b (SST based on GOES-R) crossed : GOES-R will be in West position, not East.

3_1 draft b

13/02/2015 Modifications related to OSI-201b, OSI-202b, OSI-204b PCR Action 1 : - OSI-204-b (MGR SST) : data centre removed from dissemination means (as OSI-204) - Production frequency added for OSI-204, OSI-204-b (MGR SST) and OSI-208 (IASI SST). Column “Production Frequency” added for wind products (was already added for other products in PRD version 3_0). “Production Frequency” updated to “N.A.” for all reprocessed datasets (was a mistake in PRD version 3_0).

3_1 draft c

23/02/2015 Modification related to Action OSI-CDOP2-SG06-04 : EUMETSAT Member States request about wind in STG-AFG added in section “2. Important oceanic features and requirements for satellite data”.

3_1 draft d

10/03/2015 Discontinuation of the Metop-A ASCAT 12.5 km Hamming window based winds (OSI-103) planned by STG#64 and Council in the document "Status of consolidation of the ASCAT Product Portfolio, including the full-resolution product". The OSI-103 winds have already been replaced by the ASCAT coastal winds for Metop-A (OSI-104) and Metop-B (OSI-104-b) in the OSI SAF list of products. Acronyms GLB and GBL were used for Global Oceans -> GLB replaced by GBL.

3_1 draft e

13/03/2015 Modifications related to OSI-109 ORR (March 2015) : OSI-109 split into 4 lines : each of the RadipScat 25 km and 50 km wind products are available in 2 timeliness (2 hours and 3 hours). Note (8) added to explain.



3_1 draft e bis

19/03/2015 Some updates removed from 3_1 draft b (and also from this change record) : to be proposed in next PRD update in connection with MSch update.

3_1 17/04/2015 Version approved by e-mail by the SG

3_2 12/06/2015 Modifications related to OSI-203-a and OSI-205 PCR : satellite input data updated and production frequency added for OSI-205 series : 12h OSI-DCR-2015-002 approved by SG on the 12/06/2015 according to Action OSI-CDOP2-SG07-01 Modifications related to OSI-401-b, OSI-402-b, OSI-403-b,OSI-405-b, OSI-430 ORR and OSI-409-a DRR (March 2015) : OSI-405-x series accuracy updated with “on both x and y components” OSI-DCR-2015-003 approved by SG on the 12/06/2015 according to “information to SG” in the review minutes (EUM/TSS/REP/15/796445). Reprocessed SeaWinds L2 25 km and 50 km (OSI-151) identified as two different products OSI-151-a (Reprocessed SeaWinds L2 25 km) and OSI-151-b (Reprocessed SeaWinds L2 50 km) OSI-DCR-2015-006 approved by SG on the 12/06/2015 according Decision OSI-CDOP2-SG07-11. OSI-406 (respectively OSI-406-a) requirement to be fulfilled in the OSI-203-a (respectively OSI-203-b) product (not in a independent OSI-406 product) OSI-DCR-2015-013 approved by SG on the 12/06/2015 according Decision OSI-CDOP2-SG07-17.

3_3 23/11/2015 OSI-250 (Reprocessed MSG/SEVIRI SST) requirements redefined. OSI-DCR-2015-014 approved by SG on the 11/09/2015 (Decision OSI-CDOP2-SG08-08). Correction of IASI SST (OSI-208) timeliness to 4h (was already done in SeSp 2_3_draft_f) according to OSI SAF IASI SST (OSI-208) ORR recommendation 1 and SG decision OSI-CDOP2-SG05-15. OSI-DCR-2015-011 approved by SG on the 04/11/2015. Replacement of periods by frequencies (12h → 2 per day for example) in column “production frequency”. Production frequency of OSI-301, -b, -c and OSI-302, -b, -c corrected to “1 per day” (instead of 2), these products are daily products. OSI-DCR-2015-018 approved by SG on the 04/11/2015. Removal of column “Expected date for Operations if not operational (O) at beginning of the CDOP-2” Merge of OSI-301-b and OSI-301-c because OSI-301-b will contain what was planned for OSI-301-c ; Merge of OSI-302-b and OSI-302-c because OSI-302-b will contain what was planned for OSI-302-c ; Addition of OSI-401-c, which was missing (but already in MSch) ;



Deletion of OSI-408-a : no evolution of this product is planned in CDOP2 (in accordance with MSch). OSI-DCR-2015-012 (version 1.1) approved by SG on the 04/11/2015.

3_4 29/03/2016 Update of Sea Ice Concentration data record (OSI-450) time period (change "Oct 1978-2015" to "Jan 1979-Dec 2015", justified by the late start of ERA-Interim data) Update of OSI-450 title according to EUMETSAT Secretariat through the Working Group for Data Record Generation : "Global Sea Ice Concentration Climate Data Record" (new acronym : GBL SICO CDR) OSI-DCR-2015-022 version 1.1 approved by SG on the 31/01/2016. Update of the OSI-450 validation method : validate separately the 0% and 100% sea ice cases, the accuracy targets applying to both separately. Removal of the requirements on validation method for sea ice products from OSI-PRD-PRO-208 and add of details on validation method in the product table (OSI-PRD-PRO-200). OSI-DCR-2015-024 version 1.1 approved by SG on the 31/01/2016. - correction of typo in OSI-PRD-GEN-101 (that replaced by than) - O&SI SAF replaced by OSI SAF - update of definition of area defined for sea ice products in OSI-PRD-GEN-500 (NH : north of 35°N) - update of product types (in the tables) : NRT product, Archive product, Off line product or data record. - update of verification/validation methods for sea ice concentration data records (OSI-409, OSI-409-a, OSI-450) : “Comparison with high spatial resolution manual ice charts (available between twice a week and once a week)” - in Characteristics and Methods for OSI-409, OSI-409-a, OSI-430 and OSI-450 : mention of “Includes per-grid cell uncertainties.” - use of past for finished actions in note about Interaction with ESA CCI projects. OSI-DCR-2015-25 version 1.0 approved by SG on the 31/01/2016. Evolution of OSI-203-a requirements corresponding to inclusion of sea ice probabilities (OSI-406 requirements) in the product. OSI-DCR-2015-26 version 1.1 approved by SG on the 11/03/2016.

3_5 03/05/2016 Update of the formulation of OSI-450 requirements : “verification/validation method” should be “Comparison with high spatial resolution manual ice charts (available between twice a week and once a week) : the performance shall be valided for only the “ice” and “water” cases, separately.” SG decision OSI-CDOP2-SG09-04 on the 27/04/2016. Split of ASCAT L2 winds data record (OSI-150) into 2 products with different identifiers : - ASCAT L2 25 km winds data record (OSI-150-a)



- ASCAT L2 12.5 km winds data record (OSI-150-b) “gridded wind vectors” removed from “Characteristics and Methods” for all wind data records (OSI-150-a, OSI-150-b, OSI-151-a, OSI-151-b, OSI-152, OSI-153). “ice probabilities” removed from SeaWinds winds data records (OSI-151-a and OSI-151-b). OSI-DCR-2015-020 approved by SG on the 26/04/2016 according to decision OSI-CDOP2-SG09-11. Update of OSI-205 target and threshold requirements proposed at ORR. Changed abbreviations OSI-205: SSIST → SST/IST, SIST → IST Deliver frequency OSI-205: 250 files per day, not 2. OSI-DCR-2016-003 v1.0 approved by SG on the 26/04/2016 according to decision OSI-CDOP2-SG09-13. FY-3E winds (OSI-111) cannot become operational in CDOP2 because data will not be available in CDOP2.It is now planned for CDOP3. CFOSAT winds (OSI-106) and Meteor-M winds (OSI-108) are also planned for CDOP3 (so not crossed but with an indication on operationalization in CDOP3). OSI-DCR-2016-010 v1.1 approved by SG on the 27/04/2016 according to decision OSI-CDOP2-SG09-19 Removal of OSI-401-c (Decision OSICDOP2-SG09-22 on the 26/04/2016 to remove OSI-401-c from top-level documentation) as the OSI-401-b covers the requirements of OSI-401-c. Action OSI-CDOP2-SG09-05 : PT to remove OSI-401-c in PRD, related milestones in MSch and other top-level documents.

3_6 26/09/2016 Update of sea ice emissivity requirements according to new validation method presented at DRI close-out (March 2016) OSI-DCR-2016-004 version 1.0 approved by email by SG on the 23/09/2016. Operational implementation of OSI-203-c and OSI-205-c moved to CDOP3. OSI-DCR-2016-012 version 1.0 approved by SG on the 27/04/2016. Split between 25 km winds (OSI-153-a) and 50 km winds (OSI-153-b) OSI-DCR-2016-013 version 1.0 approved by SG on the 30/08/2016.

3_7 07/11/2016 No GRIB dissemination of Global AMSR Sea Ice Concentration (OSI-408), only NetCDF. OSI-DCR-2016-017 v1.0 approved by SG on the 06/10/2016. Update of sea ice edge OSI-402-c Southern Hemisphere Requirements. OSI-DCR-2016-018 v1.0 approved by SG on the 04/11/2016.



Operations of HY-2 winds (OSI-107) and ScatSat winds (OSI-112) in CDOP3. OSI-DCR-2016-022 v1.0 approved by SG on the 04/11/2016.



Table of contents

1. Introduction .......................................................................................................................... 10 2. Important oceanic features and requirements for satellite data............................................ 14 3. Overview on the OSI SAF target production ....................................................................... 16 4. Main applications of the OSI SAF products ........................................................................ 17 5. General requirements ........................................................................................................... 18 6. Products requirements .......................................................................................................... 21 7. Web Site User Support requirements ................................................................................... 37 8. Remarks............................................................................................................................... 37



1. Introduction 1.1 Purpose of the document and considerata The purpose of this document is to provide the characteristics of products and services to be provided in the long term, e.g. at the end of the CDOP-2. It describes the committed target for development and operations. It is the main reference document for all development related reviews. It indicates to the users what can be expected after completion of planned developments. The document is structured as follows: Chapter 1: This introduction Chapter 2: Provides background information on important oceanic features and

requirements for satellite data. Chapter 3: Brings OSI SAF basic objectives. Chapter 4: Presents an overview on the products target applications. Chapter 5: Details the OSI SAF general requirements. Chapter 6: Details the OSI SAF requirements for each product. Chapter 7: Details the Web Site User Support requirements. Note : In complement to this document, the characteristics of current (pre-) operational products and services are described in the Service Specification document (SESP). This document, and its evolutions, are subject to approval by the OSI SAF Steering Group.

1.2 Applicable Documents [AD.1] Agreement between the European Organisation for the Exploitation of

Meteorological Satellites and Météo-France on the second Continuous Development and Operations Phase of a EUMETSAT Satellite Applications Facility on Ocean and Sea Ice, and annexes.

[AD.3] MTG End-User Requirements Document, EUM/MTG/SPE/07/0036. [AD.4] EPS-SG Programme End User Requirements Document,

EUM/PEPS/REQ/09/0151. [AD.5] Definition of Product Status Categories for the SAF Network,

EUM/PPS/TEN/07/0036. [AD.6] SAF Level 2 Products Generation and Dissemination Baseline for MTG, EUM/STG/64/14/DOC/08. Reference to an Applicable Document within the body of this Document is indicated as reference in the list above, e.g. [AD.1].



1.3 Terminology Each user requirement in the OSI SAF PRD bears a unique identification number which will be used for cross-reference in other documents of the OSI SAF. - Requirements that are considered as mandatory and which are committed for,

are stated with a "shall". - Requirements that are considered as desirable but which are not committed for

at this stage, are stated with a "should". - - Requirements that are still pending definition or approval are flagged with either

a TBD (To Be Defined) or a TBC (To Be Confirmed). In this document the requirements are referenced OSI-PRD.

1.4 Definitions, acronyms and abbreviations AHL Atlantic High Latitude AMSR-E Advanced Microwave Scanning Radiometer - Earth Observing

System AMSU Advanced Microwave Sounding Unit ASCAT Advanced SCATterometer ATL Atlantic low and mid latitude AVHRR Advanced Very High Resolution Radiometer BUFR Binary Universal Format Representation CCI Climate Change Initiative (ESA Programme) CDOP Continuous Development and Operations Phase CMS Centre de Météorologie Spatiale DLI Downward Long wave Irradiance DMI Danish Meteorological Institute DMSP Defense Meteorological Satellite Program ECMWF European Centre for Medium range Weather Forecast EDC EUMETSAT Data Centre EPS European Polar System ESA European Space Agency FAQ Frequently Asked Question FAR False Alarm Ratio FTP File Transfer Protocol GCOM-W Global Change Observation Mission- Water (JAXA mission) GCOS Global Climate Observing System GEO Geostationary Earth Orbit GBL Global oceans GOES Geostationary Operational Environmental Satellite GRIB GRIdded Binary format GTS Global Transmission System HIRLAM High Resolution Limited Area Model HL High Latitude HRIT High Rate Information Transmission IASI Infrared Atmospheric Sounding Interferometer IFREMER Institut Français de Recherche pour l’Exploitation de la MER IOP Initial Operational Phase ISRO Indian Space Research Organisation



JAXA Japan Aerospace Exploration Agency JPSS Joint Polar Satellite System (NOAA and NASA) KNMI Koninklijk Nederlands Meteorologisch Instituut LEO Low Earth Orbit LML Low and Mid Latitude MAP Merged Atlantic Product MET Operational Meteosat covering Africa and Europe METEOSAT Operational Meteosat covering Africa and Europe Metop Meteorological operational satellite M-F Météo-France MSG Meteosat Second Generation NAR Northern Atlantic and Regional NCEP National Centre for Environmental Prediction NESDIS National Environmental Satellite, Data and Information Service NMS National Meteorological Service NOAA National Oceanic and Atmospheric Administration NPP NPOESS Preparatory Project NPOESS National Polar-orbiting Operational Environmental Satellite System NRT Near Real-Time NWP Numerical Weather Prediction OCEANSAT-2 ISRO Meteorological satellite launched in 2009 OSCAT Oceansat-2 SCATterometer OSI SAF Ocean and Sea Ice SAF PoD Probability of Detection QC Quality Control R&D Research and Development RMDCN Regional Meteorological Data Communication Network RMS Root-Mean-Squared SAF Satellite Application Facility Std Dev Standard deviation SEVIRI Spinning Enhanced Visible and Infra-Red Imager IST (Sea) Ice Surface Temperature SSI Surface Short wave Irradiance SSMI Special Sensor Microwave Imager SSMIS Special Sensor Microwave Imager and Sounder SST/IST Sea and Sea Ice Surface Temperature SST Sea Surface Temperature TBC To Be Confirmed TBD To Be Defined UMARF Unified Meteorological Archive & Retrieval Facility VIIRS Visible/Infrared Imager/Radiometer Suite WMO World Meteorological Organisation WVC Wind Vector Cell WWW World Wide Web



2. Important oceanic features and requirements for satellite data The research in oceanography, the monitoring of climate and coastal environment, the operational Numerical Weather Prediction (NWP) and marine meteorology, the Navy operations and the off-shore activities have a common need to observe, describe, analyse and forecast the state of the oceans and its variations. In this respect, the measurement of oceanic physical parameters (temperature, salinity and currents), as well as momentum, energy and fresh water exchanges at the ocean/atmosphere interface which drive their evolution, is of extreme importance. Because of its physical nature, the ocean is much more difficult to observe than the atmosphere : most of the significant phenomena have a characteristic size which is one order of magnitude smaller than their equivalent in the atmosphere, and most of the signals are weaker. Moreover, the environmental conditions at sea make the in-situ measurements more difficult and more expensive than over land. As an example, the oceanic meso-scale eddies, which dominate the oceanic signal in most basins, have a typical size between 10 and 300 km, while the atmospheric synoptic perturbations have a typical size of 1000 km. The temporal spectrum of significant oceanic signals is also very wide, between a few hours (surface waves, internal waves, tides...) and a few months or years (eddies, equatorial waves, subtropical gyres and associated currents). All these reasons make the earth observation satellites a unique opportunity to observe the oceans with the necessary coverage, sampling and availability in operational conditions, which an in-situ measurement network would never fulfil alone. Nevertheless, the ocean is opaque for electromagnetic radiation, which implies that only surface signals can be observed from space. As a consequence, the knowledge of the three-dimensional structure of the oceans requires the combined use of satellite observations, in-situ observations and ocean numerical models through assimilation techniques. Momentum exchange between the atmosphere and the ocean determines wave spectra, storm surges, ocean circulation. The measurement of near-surface wind by scatterometer is of utmost importance, in particular for operational marine meteorology, operational NWP, ocean modelling and climate research.. Sea Surface Temperature (SST) is a key oceanic variable, which drives the turbulent heat fluxes at the ocean/atmosphere interface. Therefore, an accurate knowledge of the SST field is needed for marine meteorology, operational NWP and ocean modelling, and SST evolution is a key indicator of climate change. In addition, two important components of the heat budget at the ocean surface, which drives its evolution, can be inferred from satellite visible and infrared radiometers : the radiative short wave and long wave fluxes. No direct routine measurements of the radiative fluxes are available from ships or buoys, as the maintenance of pyranometers or pyrgeometers at sea is very difficult, and requires in addition a frequent cleaning of the instruments. Moreover, the estimates of these fluxes, provided by the NWP outputs suffer from a lot of systematic errors due to the weaknesses of models radiation and cloud parameterisations, to the lack of upper-air observations over the oceans, and model spin-up problems. Accurate information on sea ice is also crucial for a range of applications from operational NWP and numerical ocean models to climate research. Combining data



from different satellites and sensors in a multi-sensor approach ensures an optimal use of available real-time satellite data. The OSI SAF products are an answer to several users requirements sources, collected and maintained in various contexts. Let’s mention in particular : - the requirements for Ocean observations relevant to post-EPS (Stammer et al,

AEG Ocean Topography and Ocean Imaging, January 2007), - the GHRSST Users Requirements for SST, - the GCOS requirements for reprocessed products. Note also that the 82nd EUMETSAT Council meeting approved as uncontroversial the Third Party Data Services under consideration and their associated priorities as presented in EUM/C/82/14/DOC/14 which includes : - Priority 1 assigned to ISS / Rapidscat (launched in 2014) - Priority 1 assigned to HY-2A / SCAT (launched in 2011) - Priority 2 assigned to HY-2B / SCAT (to be launched in 2016)



3. Overview on the OSI SAF target production

The objective of the OSI SAF is the operational near real-time production, distribution and archiving of a coherent set of information characterising the ocean surface and the energy fluxes through it : sea-surface temperature fields and structures, radiative fluxes, wind vector and sea ice. The range of products areas has been set to take into account different domains and scales of applications : The Global Oceans, the Atlantic Ocean at low and mid latitude (including Westernmost part of Indian Ocean), The Atlantic/Arctic High latitudes, The Antarctic and the Nearest Atlantic and European seas. The OSI SAF will rely on the combined use of satellite data from different sources. Data from EUMETSAT programmes will be completed by information from other programmes as relevant, in particular USA ones : NOAA, GOES, DMSP, QuikSCAT and NPP. The OSI SAF shall provide users with products related to :

Sea Surface Temperature (underskin temperature), Sea Ice Temperature and Lake Surface Temperature

Surface radiative fluxes (Surface Short wave Irradiance (SSI) and Downward Long wave Irradiance (DLI)),

Sea Ice edge, concentration, type, emissivity and drift Near surface wind vector (at 10m height).

The products are either level 2 or 3, according to the following classification :

level 2 : retrieved geophysical products at the time and location of measurement with no complex compositing in space or time. This is the case for wind products and SST products at full satellite resolution.

level 3 : products mapped or averaged or analysed to standard geographic grids. This may include gap filling, but « missing data » gaps are acceptable. Products usually from one observation source only, although a composite product from(1) similar instruments on different satellites might legitimately be called level 3. This is the case for DLI and SSI radiative fluxes, sea ice products, and SST not at full satellite resolution



4. Main applications of the OSI SAF products The OSI SAF is an answer to the common requirements of meteorology and oceanography for a comprehensive information on the ocean-atmosphere interface. These requirements come primarily from National Meteorological Services (NMSs), which are considered as the primary users of the OSI SAF, as well as oceanic and climate research agencies. These users should normally receive the data from the SAF in order to utilise these for manufacturing higher level products or scientific work. These users include :

NWP centres, for use and/or assimilation in their operational NWP systems, marine meteorological centres, for direct use for their marine forecast activities or related service activities (storm surge prediction, oil drift prediction, ship routing etc...),

ocean modelling centres, for use and/or assimilation in numerical ocean prediction systems,

polar research centres, to monitor sea surface conditions in polar regions, climate monitoring centres, for use and/or assimilation in coupled ocean/atmosphere numerical models, with possible application to seasonal prediction,

sea ice services. Other users can be found within the economic communities exercising their activities on or in the ocean :

government agencies, in charge of safety or economic planning, research, satellite data processing centres, fisheries and aquaculture, navigation, offshore industry, coastal engineering, defence



5. General requirements

5.1 Capability requirements OSI-PRD-GEN-001 The OSI SAF products shall be generated from real-time or off-

line satellite data. OSI-PRD-GEN-002 When some of the input data are missing or corrupted,

production shall be performed as soon as the available input data make it possible.

5.2 Constraint requirements OSI-PRD-GEN-100 Operational OSI SAF products shall be available for distribution

within the specified time on a monthly basis in more than 95% of the cases where input satellite data are available with the nominal level of quality (on monthly basis). Nominal quality data are defined as input data that successfully pass all input data tests in the OSI SAF processing.

Note : End-to-end timeliness is defined from the observation time of the last satellite input data of a product to its availability at the users site via EUMETCast. OSI-PRD-GEN-101 Operational OSI SAF products accuracy should be better than

the value specified as threshold accuracy in the products tables when input satellite data are available with the nominal level of quality (on monthly basis).

5.3 Documentation and software requirements OSI-PRD-GEN-200 The OSI SAF shall maintain a record of all algorithms, software

and documentation developed during its whole life. OSI-PRD-GEN-201 Documentation shall include for each product (or family of

products) : a product user manual including algorithm and processing description,

A product validation Report An ATBD (Algorithm Theoretical Baseline Document)

5.4 Quality control requirements OSI-PRD-GEN-300 For each OSI SAF operational product, quality controls shall be

performed continuously and automatically.



OSI-PRD-GEN-301 The OSI SAF shall archive all products control reports.

5.5 Products format and access requirements OSI-PRD-GEN-400 The OSI SAF products shall be made available via the

dissemination means as specified in the corresponding tables of Chapter 6.

OSI-PRD-GEN-401 The OSI SAF products shall be made available in the formats as

specified in the corresponding tables of Chapter 6. Note : RMDCN, Internet and EumetCAST performance are out of OSI SAF responsibility OSI-PRD-GEN-402 The OSI SAF shall archive all distributed products during an

interim archive period when they are not yet migrated into EUMETSAT DATA CENTRE (EDC).

OSI-PRD-GEN-403 During the interim archive period, OSI SAF products shall be

accessible off-line through Internet over a minimum of one month backwards from the current date.

OSI-PRD-GEN-404 During the interim archive period, access to the archived

products is based on simple FTP servers accessible via Internet, with no invoicing, browsing or catalogue consultation capacity.

OSI-PRD-GEN-405 During the interim archive period, the OSI SAF Web site shall

provide users with practical information to get access to archived products

5.6 Products areas requirements

OSI-PRD-GEN-500 The OSI SAF product areas shall be as following :

• Global (GBL) : Global Oceans, • Global for the Sea Ice case : constituted of the Northern Hemisphere (NH,

north of 35°N) and the Southern Hemisphere ( SH, south of 50°S), • METEOSAT: 60S-60N, 60W-60E • GOES-E: 60S-60N, 15W-135W • Atlantic High Latitude (AHL) : Atlantic north of 50°N, • Northern High Latitude (NHL) : Poleward of 50°N • High Latitude (HL): Poleward of 50°N and 50°S • Northern Atlantic and Regional seas (NAR): seas watering EUMETSAT

member states including a large part of northern Atlantic



6. Products requirements 6.1 SST requirements OSI-PRD-PRO-1 The OSI SAF shall deliver the following SST products :

Product ID

Product Name

Product Acronym

Product Type

Operational Satellite Input Data

Other Operational Input Data

Characteristics and Methods

Disse mination Means

Format

Production Frequency

End-to-end time liness

Spatial Coverage

Spa tial sampling

Threshold Accuracy

Target Accuracy

Optimal Accuracy

Verification/ Validation Methods

Applications and main Users

Comments

OSI-201

Global METOP Sea Surface Temperature GBL SST

NRT Product

METOP / AVHRR

ECMWF outputs (temperature, humidity and aerosols profiles

Subskin temperature; multispectral algorithm

FTP server, EUMETCast, data centre

NetCDF, GRIB2

2 per day 6 h Global 0.05°

monthly bias : 1°c, Sdt Deviation : 1,5°c

monthly bias : 0,5°c, Sdt Deviation : 0,8°c


routine comparison with drifting buoy measurements

atmosphere and ocean models; oceanography and fisheries.

OSI-201-b

Global METOP Sea Surface Temperature GBL SST

NRT Product

METOP / AVHRR


Subskin temperature; multispectral algorithm + use of NWP output


NetCDF, GRIB2

2 per day 6 h Global 0.05°






use of NWP output

OSI-202

North Atlantic Regional Sea Surface Temperature NAR SST

NRT Product

METOP / AVHRR, NPP then JPSS




NetCDF, GRIB2

4 per day 6 h

North Atlantic 2 km






OSI-202-b

North Atlantic Regional Sea Surface Temperature NAR SST

NRT Product

METOP / AVHRR, NPP then JPSS




NetCDF, GRIB2

4 per day 6 h

North Atlantic 2 km






use of NWP output

OSI-203

Atlantic High Latitude Sea Surface Temperature AHL SST

NRT Product

AVHRR (NOAA, Metop)

HIRLAM outputs



NetCDF, GRIB

2 per day 3h30

Atlantic north of 50N/ 5 km

monthly bias : 1°C, Sdt Deviation : 1,5°C

monthly bias : 0,5°C, Sdt Deviation : 0,8°C

monthly bias : 0,1°C, Sdt Deviation : 0,3°C

Comparison with buoy observations

* Operational Met Services * Operational analyses and ocean models * Research or Environmental monitoring.

OSI-203-a

Northern High Latitude Sea and Sea Ice Surface Temperature

NHL SST/IST

NRT Product

AVHRR (Metop)

ECMWF outputs

SST: subskin temperature. IST: skin temperature. Multispectral algorithms.


NetCDF, GRIB

2 per day 3h30

Poleward of 50N 5 km

SST bias: 1°C SST std: 1,5°C IST bias: 2.0 / 3.0°C IST std: 3.0 / 4.0°C (1)

SST bias: 0.5°C SST std: 0.8°C IST bias: 1.0 / 1.5°C IST std: 1.5 / 2.0°C (1)


SST: Comparison with buoy observations. IST: comp with IR radiometer and buoy obs, separately (1)


Monthly accuracies. Extend to full Northen Hemisphere. Include sea ice surface temperature and Sea Ice Edge (see OSI-203-a in 6.3 Sea Ice



Product ID

Product Name

Product Acronym

Product Type





Format



Spatial Coverage

Spa tial sampling

Threshold Accuracy

Target Accuracy

Optimal Accuracy



Comments

requirements)

OSI-203-b

Northern High Latitude Sea and Sea Ice Surface Temperature

NHL SST/IST

NRT Product

AVHRR (Metop) and VIIRS (NPP, JPSS)

ECMWF outputs



NetCDF, GRIB

2 per day 3h30

Poleward of 50N 5 km






Monthly accuracies. Include VIIRS. JPSS : if data available in time before end of CDOP-2. (See also OSI-203-b in 6.3 Sea Ice requirements)

OSI-203-c

High Latitude Sea and Sea Ice Surface Temperature HL SST/IST

NRT Product


ECMWF outputs



NetCDF, GRIB

2 per day 3h30

Poleward of 50N and 50S 5 km





* Operational Met Services * Operational analyses and ocean models * Research or Environmental monitoring

Monthly accuracies. Extend to Southern hemisphere. Include use of RTTOV (See also OSI-203-c in 6.3 Sea Ice requirements) Operational implementation in CDOP3

OSI-204

Full resolution MetOp Sea Surface Temperature metagranules MGR SST

NRT Product

METOP / AVHRR



FTP server, EUMETCast, NAIAD NetCDF

480 per day (each 3min) 4 h Global 1 km






OSI-204-b

Full resolution MetOp Sea Surface Temperature metagranules MGR SST

NRT Product

METOP / AVHRR



FTP server, EUMETCast, NAIAD NetCDF

480 per day (each 3min) 4 h Global 1 km






use of NWP output

OSI-205

High Latitude L2 Sea and Sea Ice Surface Temperature L2 SST/IST

NRT Product

AVHRR (Metop)

ECMWF outputs


FTP server, EUMETCast, data centre NetCDF

250 per day (each 3 min)

3h Poleward of 50N/50S 1 km






Monthly accuracies. Include sea ice surface temperature



Product ID

Product Name

Product Acronym

Product Type





Format



Spatial Coverage

Spa tial sampling

Threshold Accuracy

Target Accuracy

Optimal Accuracy



Comments

OSI-205-b


NRT Product


ECMWF outputs



Metop250 per day (each 3 min)

3h Poleward of 50N/50S 1 km






Monthly accuracies. Include VIIRS. JPSS : if data available in time before end of CDOP-2.

OSI-205-c


NRT Product


ECMWF outputs



Metop250 per day (each 3 min) 3h

Poleward of 50N/50S 1 km






Monthly accuracies. Include use of RTTOV Operational implementation in CDOP3

OSI-206

METEOSAT Sea Surface Temperature MET SST

NRT Product MSG / SEVIRI

ECMWF outputs (temperature, humidity and aerosols profiles)

Subskin temperature; multispectral algorithms + bias correction


NetCDF, GRIB2

24 per day 3 h

East Atlantic, West Indian: 60N-60S 60W-60E

0.05° Lat-Lon


Bias : 0,5°c, sdt Deviation : 1°c




OSI-206-b

METEOSAT Sea Surface Temperature MET SST

NRT Product MTG / FCI




24 per day

1 h 30


0.05° Lat-Lon






OSI-207

GOES-E Sea Surface Temperature

GOES-E SST

NRT Product

GOES-E imager


multispectral algorithms + bias correction


NetCDF, GRIB2

24 per day 3 h

West Atlantic East Pacific 60N-60S 135W-15W

0.05° Lat-Lon






OSI-207-b

GOES-E Sea Surface Temperature

GOES-E SST

NRT Product GOES-R ABI




NetCDF, GRIB2 1 h 3 h


0.05° Lat-Lon





atmosphere and ocean models; oceanography and fisheries. Op. in CDOP3

OSI-208 IASI SST IASI SST NRT Product Metop IASI

L2P core IASI SST produced by CAF IASI L2 package


480 per day (each 3min) 4 h Global

12 to 40 km


Bias : 0,5°c, sdt Deviation : 0,8°c



atmosphere and ocean models.

OSI-250

Reprocessed MSG/SEVIRI SST

REPMSGSST Data record MSG SEVIRI

ECMWF outputs (temperature, humidity and

Subskin temperature; multispectral algorithm + use of NWP output. Time period : 2004-

data centre, Ifremer NetCDF N.A.

Off line

East Atlantic, West Indian: 60N-60S

0.05° Lat-Lon

monthly bias : 1°c, Sdt Deviation : 1°c



routine comparison with drifting buoy measurements climate.

Temporal sampling : 1 hour



Product ID

Product Name

Product Acronym

Product Type





Format



Spatial Coverage

Spa tial sampling

Threshold Accuracy

Target Accuracy

Optimal Accuracy



Comments

aerosols profiles)

2012 60W-60E

(1) The IST accuracy requirements are split in two: the first is for validation against in situ IR radiometers, the second for in situ buoy data. The reason for this is discussed in the ATBD for OSI-205. OSI-PRD-PRO-2 The OSI SAF shall produce SST values in cloud clear areas only. In particular, no interpolation or analysis method shall be

used to estimate SST in cloudy areas. OSI-PRD-PRO-3 Each grid node of a SST product shall include the SST value, the representative time of the SST value and the confidence

level, defined in compliance with the GHRSST-PP recommendations. OSI-PRD-PRO-4 SST values shall be continuously quality controlled by comparison with night-time buoy measurements gathered in match-up

data bases. OSI-PRD-PRO-5 The SST match-up data base shall be available to interested users on request. OSI-PRD-PRO-6 The SST products shall include Surface Temperature over selected lakes as derived from the standard SST algorithm, with

no commitment on the accuracy and validation.

6.2 Radiative Fluxes (DLI and SSI) requirements OSI-PRD-PRO-100 The OSI SAF shall deliver the following Radiative Fluxes products :



Product ID

Product Name

Product Acronym

Product Type


Other Opera tional Input Data

Characte ristics and Methods

Disse mina tion Means Format



Spatial Coverage

Spa tial sampling

Threshold Accuracy

Target Accuracy

Optimal Accuracy



Comments

OSI-301

AHL Downward Longwave Irradiance AHL DLI

NRT Product

AVHRR (NOAA, Metop)

HIRLAM outputs

Bulk parameterization


GRIB NetCDF HDF5

1 per day 3 h 30

Atlantic North of 50N 5 km

monthly relative bias : 10%, monthly relative Std. Deviation :20%


monthly relative bias : 0%, monthly relative Std. Deviation : 3%

Comparison with Pyrgeometers measurement

NWP, Ocean and biological modeling at operational and research centers.

OSI-301-b

AHL Downward Longwave Irradiance AHL DLI

NRT Product

AVHRR, VIIRS (NPP, JPSS)

HIRLAM outputs



GRIB NetCDF HDF5

1 per day 3 h 30





Comparison with Pyrgeometers measurement


Include VIIRS and improved over sea ice

OSI-302

AHL Surface Solar Irradiance AHL SSI

NRT Product

AVHRR (NOAA, Metop)

HIRLAM outputs



GRIB NetCDF HDF5

1 per day 3 h 30





Comparison with Pyranometers measurement


OSI-302-b

AHL Surface Solar Irradiance AHL SSI

NRT Product

AVHRR, VIIRS (NPP, JPSS)

HIRLAM outputs



GRIB NetCDF HDF5

1 per day 3 h 30





Comparison with Pyranometers measurement


Include VIIRS and improved over sea ice

OSI-303

METEOSAT Downward Longwave Irradiance MET DLI

NRT Product MSG / SEVIRI


bulk parametrization.


NetCDF, GRIB2

24 per day + 1 per day 2 h


0.05° Lat-Lon


monthly (TBC) relative bias : 5%, monthly relative Std. Deviation :10%


routine comparison with pyrgeometer measurements ocean atmosphere studies.

OSI-303-b

METEOSAT Downward Longwave Irradiance MET DLI

NRT Product MTG / FCI




24 per day

1 h 30


0.05° Lat-Lon





1 per day

3 h


0.05° Lat-Lon





OSI-304

METEOSAT Surface Solar Irradiance MET SSI

NRT Product MSG / SEVIRI NA physical method


NetCDF, GRIB2



0.05° Lat-Lon




routine comparison with pyranometer measurements ocean atmosphere studies.

OSI-304-b

METEOSAT Surface

Solar Irradiance

MET SSI NRT Product MTG / FCI NA physical method


NetCDF 24 per day

1 h 30


0.05° Lat-Lon





1 per day

3 h


0.05° Lat-Lon

monthly relative bias : 20%, monthly relative Std. Deviation :






Product ID

Product Name

Product Acronym

Product Type







Spatial Coverage

Spa tial sampling

Threshold Accuracy

Target Accuracy

Optimal Accuracy



Comments

25%

OSI-305

GOES-E Downward Longwave Irradiance

GOES-E DLI

NRT Product GOES-E imager




NetCDF, GRIB2



0.05° Lat-Lon





OSI-305-b

GOES-E Downward Longwave Irradiance

GOES-E DLI

NRT Product GOES-R ABI




NetCDF, GRIB2

1 h, 24 h 2 h


0.05° Lat-Lon




routine comparison with pyrgeometer measurements ocean atmosphere studies. Op. in CDOP3

OSI-306

GOES-E Surface Solar Irradiance

GOES-E SSI

NRT Product GOES-E imager NA physical method


NetCDF, GRIB2



0.05° Lat-Lon





OSI-306-b

GOES-E Surface Solar Irradiance

GOES-E SSI

NRT Product GOES-R ABI NA physical method


NetCDF, GRIB2

1 h, 24 h 2 h


0.05° Lat-Lon




routine comparison with pyranometer measurements ocean atmosphere studies. Op. in CDOP3

OSI-PRD-PRO-101 Each grid node of a SSI and DLI product shall include the flux value and the confidence level of the flux value labelled on a

five level scale: 5 = “excellent”, 4= “good”, 3=”acceptable”, 2=“bad”, 1=“erroneous”,and 0=“unprocessed. OSI-PRD-PRO-102 hourly SSI products quality shall be continuously quality controlled against a set of pyranometers measurement stations

selected over land and gathered in a match-up data base. OSI-PRD-PRO-103 hourly DLI products quality shall be continuously quality controlled against a set of pyrgeometer measurement stations

selected over land and gathered in match-up data base. OSI-PRD-PRO-104 The DLI and SSI match-up data bases shall be available to interested users on request. OSI-PRD-PRO-105 GOES-E and MET satellite-derived SSI and DLI inter-comparison shall be made in overlapping areas.



6.3 Sea Ice requirements

OSI-PRD-PRO-200 The OSI SAF shall deliver the following Sea Ice products :



Product ID

Product Name

Product Acronym

Product Type




Disse mina tion Means

Format



Spa tial Cove rage

Spa tial sampling

Threshold Accuracy

(2)

Target Accuracy

(2)

Optimal Accuracy

(2)

Verification/Validation Methods


Comments

OSI-401

Global Sea Ice Concentration GBL SICO

NRT product

SSM/I,

ECMWF outputs

Daily averaged fractional ice cover in percentage.

EUMETCast, FTP, EDC

GRIB NetCDF HDF5

1 per day 5 h Global 10km 20 %

(6)

10% for NH-product. 15% for SH-product (6)

10%(6)

NWP and Ocean/Ice models, operational Met and Sea Ice services.

OSI-401-a


NRT product SSMIS

ECMWF outputs

Daily averaged fractional ice cover in percentage.

EUMETCast, FTP, EDC

GRIB NetCDF HDF5


(6)


10%(6)


OSI-401-b


NRT product

SSMIS

ECMWF outputs

Daily averaged fractional ice cover in percentage. Includes uncertainty estimates.

EUMETCast, FTP, EDC

GRIB NetCDF HDF5


(6)


10%(6)

Comparison with high resolution manual ice charts : the performance shall be valid for the total range of ice percentage (not limited to “ice” (100% ice) and “water” (0 % ice) conditions) NWP and Ocean/Ice models,

operational Met and Sea Ice services.

Includes the use of DMSP-F18

OSI-402 Global Sea Ice Edge GBL SIED

NRT product

SSM/I, ASCAT

ECMWF outputs

Discrimination Open ice/Closed ice/No ice. Multisensor analysis, daily average.

EUMETCast, FTP, EDC

GRIB NetCDF HDF5

1 per day 5 h Global 10 km

30 km, distance to ice edge (yearly average)

20 km (yearly average)


Comparison with high resolution manual ice charts


OSI-402-a Global Sea Ice Edge GBL SIED

NRT product

SSMIS, ASCAT

ECMWF outputs

Discrimination Open ice/Closed ice/No ice. Multisensor analysis, daily average.

EUMETCast, FTP, EDC

GRIB NetCDF HDF5







OSI-402-b Global Sea Ice Edge GBL SIED

NRT product

SSMIS, ASCAT

ECMWF outputs

Discrimination Open ice/Closed ice/No ice. Multisensor analysis, daily average. Risk mitigation against sensor degradation.

EUMETCast, FTP, EDC

GRIB NetCDF HDF5







Dynamical algorithm to improve transitions between seasons

OSI-402-c Global Sea Ice Edge GBL SIED

NRT product

SSMIS, ASCAT, AMSR-2

ECMWF outputs

Discrimination Open ice/Closed ice/No ice. Multisensor analysis, daily average. Risk mitigation against sensor degradation.

EUMETCast, FTP, EDC

GRIB NetCDF HDF5


NH : 30 km, distance to ice edge (yearly average) SH : 70 km, distance to ice edge (yearly average)

NH : 20 km (yearly average) SH : 45 km (yearly average)




+AMSR-2, ASCAT on Metop-B and DMSP-F18

OSI-403 Global Sea Ice Type GBL SITY

NRT product

SSM/I, ASCAT

ECMWF outputs

Discrimination First year, Multi year. Multisensor analysis, daily average.

EUMETCast, FTP, EDC

GRIB NetCDF HDF5


200000km2 monthly std.dev. in difference from running mean.



Compare NH mulit-year area with 11-days running mean. (1)


OSI-403-a Global Sea Ice Type GBL SITY

NRT product

SSMIS, ASCAT

ECMWF outputs

Discrimination First year, Multi year. Multisensor analysis, daily average.

EUMETCast, FTP, EDC

GRIB NetCDF HDF5









Product ID

Product Name

Product Acronym

Product Type





Format



Spa tial Cove rage

Spa tial sampling

Threshold Accuracy

(2)

Target Accuracy

(2)

Optimal Accuracy

(2)



Comments

OSI-403-b Global Sea Ice Type GBL SITY

NRT product

SSMIS, ASCAT

ECMWF outputs

Discrimination First year, Multi year. Multisensor analysis, daily average. Risk mitigation against sensor degradation.

EUMETCast, FTP, EDC

GRIB NetCDF HDF5







Dynamical algorithm to improve transitions between seasons

OSI-403-c Global Sea Ice Type GBL SITY

NRT product


ECMWF outputs

Discrimination First year, Multi year. Multisensor analysis, daily average. Risk mitigation against sensor degradation.

EUMETCast, FTP, EDC

GRIB NetCDF HDF5







+AMSR-2, ASCAT on Metop-B and DMSP-F18

OSI-404

Global Sea Ice Emissivity GBL SIEM

NRT product SSMIS None

Sea ice emissivity at 50GHz, daily average. Simulated with measured coefficients.

EUMETCast, FTP, EDC

NetCDF (GRIB if requested)


NH 15%, SH 20%

(6)

NH 10%, SH 15%

(6)

NH 2%, SH 5%

(6)

Compare with RTM simulations using NWP


OSI-404-a

Global Sea Ice Emissivity GBL SIEM

NRT product SSMIS, None

Sea ice emissivity at 50GHz, daily average. Simulated with measured coefficients Including uncertainties.

EUMETCast, FTP, EDC



NH 15%, SH 20%

(6)

NH 10%, SH 15%

(6)

NH 2%, SH 5%

(6)

Compare with RTM simulations using NWP


OSI-405

Low Resolution Sea Ice Drift

GBL LR SIDR

NRT product

SSM/I, ASCAT,

ECMWF outputs

Single and multi sensor analysis. Displacement after 48 hours in km.

EUMETCast, FTP, EDC


1 per day 6 h Global 62.5 km

10 km yearly std deviation on both x and y components after 48 hours displacement



Collocation with buoys


OSI-405-a


GBL LR SIDR

NRT product

SSMIS, ASCAT,

ECMWF outputs


EUMETCast, FTP, EDC








OSI-405-b


GBL LR SIDR

NRT product


ECMWF outputs


EUMETCast, FTP, EDC








OSI-405-c


GBL LR SIDR

NRT product


ECMWF outputs

Single and multi sensor analysis. Displacement after 48 hours in km. Including uncertainties.

EUMETCast, FTP, EDC








Introducing uncertainties



Product ID

Product Name

Product Acronym

Product Type





Format



Spa tial Cove rage

Spa tial sampling

Threshold Accuracy

(2)

Target Accuracy

(2)

Optimal Accuracy

(2)



Comments

OSI-203-a (corresponding to OSI-406 requirement)

(8)

Regional Sea Ice Edge REG SIED

NRT Product AVHRR

ECMWF outputs

Probabilities of open water and sea ice. Single sensor analysis.

EUMETCast, FTP, EDC

NetCDF, GRIB

2 per day 3 h 30

l Poleward of 50N 5 km

PoD: 0.65 FAR: 0.40

PoD: 0.80 FAR: 0.20

PoD: 0.90 FAR: 0.10

Comparison with high resolution manual ice charts Regional models and services.

This product will be provided together with NHL SST/IST (see OSI-203-a in 6.1 SST requirements)

OSI-203-b (corresponding to OSI-406-a requirement)

(8)

Poleward of 50N

OSI-203-c (corresponding to OSI-406-a requirement)

(8)

Regional Sea Ice Edge REG SIED

NRT Product AVHRR, VIIRS

ECMWF outputs

Probabilities of open water and sea ice. Multisensor sensor analysis

EUMETCast, FTP, EDC

NetCDF,GRIB

2 per day 3 h 30

Poleward of 50N and 50S 5 km

PoD: 0.65 FAR: 0.40

PoD: 0.80 FAR: 0.20

PoD: 0.90 FAR: 0.10

Comparison with high resolution manual ice charts Regional models and services.

This product will be provided together with NHL SST/IST (see OSI-203-b and OSI-203-c in 6.1 SST requirements)

OSI-407

Medium Resolution Sea Ice Drift

NH MR SIDR

NRT product AVHRR

Single sensor analysis.Displacement after 24 hours in km.

EUMETCast, FTP, EDC


1 per day 6 h

Northern Hemisphere 20 km

5 km yearly std deviation after 24 hours displacement




Ocean/Ice and NWP models, operational Met and Sea Ice services.

OSI-407-a

Medium Resolution Sea Ice Drift

NH MR SIDR

NRT product AVHRR, VIIRS

Single sensor analysis.Displacement after 24 hours in km.

EUMETCast, FTP, EDC


1 per day 6 h

Northern Hemisphere 20 km






OSI-408

Global AMSR Sea Ice Concentration

GBL AMSR SICO

NRT product AMSR-2

ECMWF outputs

Daily averaged fractional ice cover in percentage

EUMETCast, FTP, EDC NetCDF


(6)


10%(6)


OSI-409

Global reprocessed Sea Ice Concentration

GBL REP SICO Data record

SMMR from NSIDC, SSM/I from RSS

ECMWF outputs

Daily averaged fractional ice cover in percentage. Includes per-grid cell uncertainties. FTP, EDC NetCDF

1 per day Offline Global

10km and 12.5km

(5)20 %

(6)


10%(6)

Climate models, NWP and Ocean/Ice hindcast models, environmental agencies.

Time period 1978-2007. Will be replaced by OSI-450

OSI-409-a

Global reprocessed Sea Ice Concentration

GBL REP SICO Data record

SSM/I from NOAA through UK Met Office and ECMWF, SSMIS from EUMETCast

ECMWF outputs

Daily averaged fractional ice cover in percentage. Fully consistent with OSI-409, to ensure homogeneity. Includes per-grid cell uncertainties. FTP, EDC NetCDF

1 per day Offline Global

10km and 12.5km

(5)20 %

(6)


10%(6)

Climate models, NWP and Ocean/Ice hindcast models, environmental agencies.

Time period 2009-2014. To cover the gap between OSI-409 and OSI-430.

OSI-430

Global reprocessed Sea Ice Concentration Updates

GBL REPU SICO

Off line product

SSMIS from EUMETCast

ECMWF outputs

Daily averaged fractional ice cover in percentage. Fully consistent with with OSI-409, to ensure homogeneity. Includes per-grid cell uncertainties. FTP, EDC NetCDF

1 per day

1 month Global

10km and 12.5km

(5)20 % (yearly average)


10%(6)

Comparison with high spatial resolution manual ice charts (available between twice a week and once a week) : the performance shall be valid for the total range of ice percentage (not limited to “ice” (100% ice) and “water” (0 % ice) conditions)

Climate models, NWP and Ocean/Ice hindcast models, environmental agencies

Starting continuous updates



Product ID

Product Name

Product Acronym

Product Type





Format



Spa tial Cove rage

Spa tial sampling

Threshold Accuracy

(2)

Target Accuracy

(2)

Optimal Accuracy

(2)



Comments

OSI-450(3)

Global Sea Ice Concentration Climate Data Record

GBL SICO CDR Data record

SMMR, SSM/I and SSMIS from CM SAF

ECMWF outputs

Daily averaged fractional ice cover in percentage. Includes per-grid cell uncertainties. FTP, EDC NetCDF

1 per day Offline Global 25km

(5,7)15 %

(6) 8%

(6) 5%

6)

Comparison with high spatial resolution manual ice charts (available between twice a week and once a week) : the performance shall be validated for only the “ice” and “water” cases, separately.

Climate models, NWP and Ocean/Ice hindcast models, environmental agencies

Time period Jan 1979-Dec 2015.Will replace OSI-409 and OSI-409-a

(1) Monitoring/validation of ice type : There are no routinely updated sea ice type in situ measurements available, so monitoring of the sea ice type product is done by monitoring the daily variation in area extent of the multi-year sea ice type fraction through the season. This daily area extent is compared against a 11-days running mean, and should not vary too much (OSI-403, OSI-403a and OSI-403b products). (2) Accuracy of the different sea ice products upgrades : The target accuracy requirement of the sea ice products have usually not been changed for upgrades to the products, which is the case for other OSI SAF products also. But we do not introduce an algorithm update if the validation do not show equal or better performance. Still, some upgrades are not related to algorithm changes, but introduction of new sensors that improve resolution or coverage (all sea ice products). (3) Interaction with ESA CCI projects : the Project Teams at MET Norway and DMI were engaged from December 2011 to December 2014 in a project with ESA under the Climate Change Initiative program. One aim of the project was to develop a time-series of sea ice concentration ECV, which is very similar in scope to the datasets developed in the OSISAF CDOP-1 (OSI-409) and CDOP-2 (OSI-450). It is thus natural for the Project Team to seek best synergies between the two projects, especially in terms of re-use of processing software. A specific acknowledgement that the OSISAF contributed with re-use of (part of) its processing software will be carried into the ESA CCI product. The ESA CCI Sea Ice project enters in its 2nd phase (Jan 2015 to Dec 2017) with active participation of Project Teams at MET Norway and DMI. The requirements of OSI-450 are updated to document that contribution from the SICCI projects allows to aim for a better result. The SICCI2 project will use the same processing software to generate a dataset from AMSR-E and AMSR2 (2002-2015, with data gaps), which is not a CDOP2 product.



(5) Spatial sampling : The products are provided in two different projections/grids. Polar stereographic at 10km and Lambert azimuthal at 12.5km. Both are provided to be consistent with NSIDC products. As NSIDC introduces newer grids (EASE2), so does CDOP2 for selected product. (6) Sea Ice concentration and emissivity accuracy : these numbers are standard deviation of sea ice concentration/emissivity, averaged over one year. (7) Spatial sampling of OSI-450: The sensors entering OSI-450 do not justify the daily sea ice concentration fields to be presented at 10 or 12.5 km sampling without dedicated additional work on the processing algorithms and/or uncertainties. An EASE2 grid with 25 km resolution is a more sensible spatial sampling for OSI-450 (OSI-450 will go back to 1979 only, justified by the late start of ERA-Interim data). (8) Validation of OSI-203 series (corresponding to OSI-406 series requirement): This validation will be computed and analysed monthly, and reported as a part of the OSI-203 validation. OSI-PRD-PRO-201 Each grid node of a sea ice field shall contain the sea ice value and a confidence or uncertainty parameter. OSI-PRD-PRO-202 The following quality control shall be implemented on sea ice products:

- monitor confidence parameters, - for sea ice concentration and ice edge compare ice estimates with ice analyses from regional ice centres,

- for northern hemisphere ice type compare multi-year ice area estimates with running mean for consistency checking, - for sea ice drift compare drift estimate with drift of buoys or other installations on the ice reporting GPS position. OSI-PRD-PRO-203 The low resolution ice drift product shall not be delivered during the summer season. The duration of the summer interruption

can be different for each sensor, depending on the sensors sensitivity to atmospheric noise and surface melting. OSI-PRD-PRO-204 The medium resolution ice drift product shall only deliver values in cloud free conditions.



OSI-PRD-PRO-205 The OSI SAF shall reprocess the time series of SMMR, SSM/I and SSMIS data back to 1978 to expand the time series of global sea ice products.

OSI-PRD-PRO-206 The OSI SAF shall test new methods for ensuring a climate consistent data set. OSI-PRD-PRO-207 The OSI SAF shall improve the coverage of the existing sea ice concentration, edge and type products by adding

interpolation in the coastal zone and the area close to the pole where there is no satellite data coverage. OSI-PRD-PRO-208 (removed) OSI-PRD-PRO-209 The Sea Ice Regional Edge product (OSI-406) shall be only valid when the sun is above 5° elevation. OSI-PRD-PRO-210 The Sea Ice Regional Edge product (OSI-406) shall be monitored on PoD (Probability of Detection) and FAR (False Alarm

Ratio), which definition is given in the OSI-406 validation report.

6.4 Wind requirements

OSI-PRD-PRO-300 The OSI SAF shall deliver the following Wind products :



Product ID

Product Name

Product Acronym

Product Type







Spa tial Cove rage

Spa tial sampling

Threshold Accuracy

Target Accuracy

Optimal Accuracy



Comments

OSI-102

ASCAT 25 km Winds ASCAT25 NRT Product

ASCAT on Metop A

ECMWF outputs (wind, SST, land-sea mask)

Swath sigma0’s and wind vectors

EUMETCast FTP server, GTS, data centre, NAIAD

BUFR, NetCDF

Continuous 2 h 45 Global 25 km N/A

Better than 2 m/s in wind component Stdev with a bias of less than 0.5 m/s in wind speed on a monthly basis. N/A

Triple collocation with NWP and buoys

* Operational Met Services (including assimilation in at least 8 NWP models, nowcasting) * Operational analyses and ocean models* Research or Environmental monitoring.

OSI-102-b

ASCAT 25 km Winds ASCAT25 NRT Product

ASCAT on Metop B



EUMETCast FTP server, GTS, data centre, NAIAD

BUFR, NetCDF

Continuous 2 h 45 Global 25 km N/A



* Operational Met Services (including assimilation in at least 8 NWP models, nowcasting) * Operational analyses and ocean models* Research or Environmental monitoring.

OSI-103

ASCAT 12.5 km Winds ASCAT12 NRT Product

ASCAT on Metop A



EUMETCast FTP server, data centre

BUFR, NetCDF

Continuous 2 h 45 Global 12.5 km N/A



* Operational Met Services (including assimilation in at least 8 NWP models, nowcasting) * Operational analyses and ocean models* Research or Environmental monitoring. Replaced by OSI-104

OSI-104

ASCAT coastal Winds ASCAT12+ NRT Product

ASCAT on Metop A



EUMETCast FTP server, GTS, data centre

BUFR, NetCDF




* Operational Met Services (including assimilation in at least 8 NWP models, nowcasting) * Operational analyses and ocean models* Research or Environmental monitoring. replace OSI-103

OSI-104-b

ASCAT coastal Winds ASCAT12+ NRT Product

ASCAT on Metop B



EUMETCast FTP server, GTS, data centre

BUFR, NetCDF




* Operational Met Services (including assimilation in at least 8 NWP models, nowcasting) * Operational analyses and ocean models* Research or Environmental monitoring. . replace OSI-103

OSI-105

Oceansat-2 50 km winds OSCAT50

Archive Product

OSCAT on Oceansat-2 (India)



FTP server, data centre

BUFR, NetCDF

Continuous 3 h Global 50 km N/A

Better than 2 m/s inwind component Stdev with a bias of less than 0.5 m/s in wind speed on a monthly basis. N/A


* Operational Met Services * Operational analyses and ocean models* Research or Environmental monitoring

irrecoverable instrument failure on 20 February 2014

OSI-106

CFOSAT winds TBD NRT Product

Scatterometer on CFOSAT (France/China)




BUFR, NetCDF TBD Global TBD N/A




Expected lauch date is now 2018 (Op. in CDOP3)

OSI-107

HY-2 winds TBD NRT Product

Scatterometer on HY-2 (China)




BUFR, NetCDF

Continuous TBD Global TBD N/A

Better than 2 m/s in wind component Stdev with a bias of less than 0.5 m/s in wind speed N/A



Availability of data is not yet established. Waiting for HY-2B. (Op. in CDOP3)



Product ID

Product Name

Product Acronym

Product Type







Spa tial Cove rage

Spa tial sampling

Threshold Accuracy

Target Accuracy

Optimal Accuracy



Comments

OSI-108

Meteor-M winds TBD NRT Product

Scatterometer on Hydromet (Russia)




BUFR, NetCDF TBD Global TBD N/A




Availability of data is not yet established. Launch is postponed until 2018. (Op. in CDOP3)

OSI-109-a (8)

EUMETCast FTP server 2h

OSI-109-c (8)

Rapid Scat 25km winds

RSCAT25 NRT Product RapidScat Scatterometer on ISS


Swath sigma0’s and wind vectors EUMETCast

FTP server, data centre

BUFR, NetCDF

Continuous

3h

Between 56N and 56S

25 km N/A

Better than 2 m/s in wind component Stdev with a bias of less than 0.5 m/s in wind speed

N/A Triple collocation with NWP and buoys


OSI-109-b (8)

EUMETCast FTP server 2h

OSI-109-d (8)

Rapid Scat 50km winds

RSCAT50 NRT Product RapidScat Scatterometer on ISS




BUFR, NetCDF

Continuous

3h

Between 56N and 56S

50 km N/A

Better than 2 m/s in wind component Stdev with a bias of less than 0.5 m/s in wind speed



OSI-111

Feng-Yun 3E winds TBD NRT Product FY-3E




BUFR, NetCDF





Expected lauch date is now 2016. (Op. in CDOP3)

OSI-112

ScatSat winds TBD NRT Product

OSCAT on ScatSat




BUFR, NetCDF





ScatSat launched on 26/09/2016. (Op. in CDOP3)



Product ID

Product Name

Product Acronym

Product Type







Spa tial Cove rage

Spa tial sampling

Threshold Accuracy

Target Accuracy

Optimal Accuracy



Comments

OSI-150-a

ASCAT L2 25 km winds data record REPASC25

25 km

OSI-150-b

ASCAT L2 12.5 km winds data record

REPASC12+

Data record

EUMETSAT Secretariat reprocessed Metop-A ASCAT L1b


Swath sigma0’s, wind vectors and ice probabilities. Time period 2007-2014

data centre BUFR, NetCDF N.A. offline Global

12.5 km

N/A

Better than 2 m/s in wind component Stdev with a bias of less than 0.5 m/s in wind speed on a monthly basis.


* Reanalyses * Ocean models, air-sea interaction * Climate research, Environmental monitoring

OSI-151-a

Reprocessed SeaWinds L2 25 km winds

REPSW25 25 km

OSI-151-b

Reprocessed SeaWinds L2 50 km winds

REPSW50

Data record

QuikSCAT SeaWinds L2A from PO.DAAC


Swath sigma0’s and wind vectors. Time Period 1999-2009

data centre BUFR, NetCDF N.A. offline Global

50 km

N/A

Better than 2 m/s in wind component Stdev with a bias of less than 0.5 m/s in wind speed on a monthly basis.Wind speed stability better than 0.1 m/s in 10 years



OSI-152

Reprocessed ERS SCAT L2 winds REPERS Data record

ERS-1 and ERS-2 SCAT reprocessed by ESA (SCIRoCCo project)


Swath sigma0’s and wind vectors. Time period end 1991-beginning of 2001 data centre

BUFR, NetCDF N.A. offline Global

L2: 25 km N/A




Availabiliy of ERS depends on progress in ESA Scirocco project

OSI-153-a

Oceansat-2 L2 25 km winds data record

25 km

OSI-153-b

Oceansat-2 L2 50 km winds data record

REPOSCAT Data record Oceansat-2 scatterometer

ECMWF outputs (wind, SST, land-

sea mask)

Swath sigma0’s, wind vectors and ice probabilities.

Time period 2009-2014

data centre BUFR,NetCDF

N.A. offline Global

50 km

N/A

Better than 2 m/s in wind component

Stdev with a bias of less than 0.5 m/s in

wind speed on a monthly basis.

N/A Triple collocation

with NWP and buoys

* Reanalyses * Ocean models, air-sea interaction * Climate research, Environmental

monitoring



(8) The RadipScat 25 km and 50 km wind products (OSI-109) are available with different timeliness. One product is available approximately 2 hours after the sensing time of the middle of an orbit file and contains approximately 80% of the theoretical data amount (OSI-109-a, OSI-109-b). The other product is available approximately 3 hours after the sensing time of the middle of an orbit file and contains approximately 98% of the theoretical data amount (OSI-109-c, OSI-109-d). Hence the user can choose between a timely, but less complete product and a less timely, but more complete product.

OSI-PRD-PRO-301 Each Wind Vector Cell (WVC) of a BUFR wind product shall include: - input product data, e.g. location, backscatter data and measurement geometry, - unique wind solution (chosen) and its corresponding ambiguity, - qualifty information, such as wind quality indicator, wind direction skill, ice screening information, and a recommendation for use.

OSI-PRD-PRO-302 Each Wind Vector Cell (WVC) of a NetCDF wind product shall include: - input product data, e.g. location, - unique wind solution (chosen). - quality information, such as wind quality indicator, wind direction skill, ice screening information, and a recommendation for use.

OSI-PRD-PRO-303 NWP 10 m winds shall be appended to the satellite data in the wind product. OSI-PRD-PRO-304 The wind products quality control shall include a global checking of the mean inversion residual (“cone” distance) and wind

speed difference with the reference global NWP model over a 1-hour period. OSI-PRD-PRO-305 The wind products quality control shall include a WVC-by-WVC checking of the wind inversion residual (“cone” distance) and

ice detection at each node. OSI-PRD-PRO-306 In the case of missing NWP wind input, where no ambiguity removal may be performed, the inverted winds shall be

disseminated with ambiguity, and flagged as such in the BUFR wind products. In the NetCDF products, no winds will be present in the case of missing NWP wind input.



7. Web Site User Support requirements OSI-PRD-WUS-1 The OSI SAF Web Site shall offer to the users, depending on

their rights, access to : - general information on the OSI SAF, - information on the products and their quality, - near-real time Quicklooks, - Documentation, including Product User manuals, Product Validation reports, - Operations Reports, Technical and scientific reports, ATBD, - News and service messages, with automatic and selective near-real time sending, - a permanent user enquiry, - Frequently Asked Questions ( FAQ), - Related links, - User registration procedure allowing to a user to get full access rights, - User support through a Help desk mechanism,

- Near-real time and off line Products on FTP servers.

8. Remarks The notion of HIRLAM in the product requirement tables shall be understood as “HIRLAM” or other limited area model.

Ocean and Sea Ice SAF CDOP-2 Product Requirement Document · Final PRD of CDOP-1 approved by SG...

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Transcript of Ocean and Sea Ice SAF CDOP-2 Product Requirement Document · Final PRD of CDOP-1 approved by SG...