Sentinels PDGS Demodulator and Front End...

Sentinels PDGS Industry Information Day, 5 May 2009, pg. 1

Sentinels PDGS

Demodulator andFront End Processor


The technical feasibility assessment has shown that a common procurement is feasible across Sentinels:

RF level – commonality confirmed.

Data level (commonality based on standards, e.g., CCSDS)

Downlink Channel Management – Commonality issue found.Sentinel 3 only: inter-channel downstream dependency (implies extra development and more stringent ground performances) – Function allocation still TBC.

Other differences are mainly at configuration level.

The market survey indicates the presence of some equipment closed to Sentinel needs (not extensive development phase expected).

Technical Assessment and Market Survey


The Scope of the Procurement

FEPFEPX-band AntennaX-band Antenna

L0L0MODEMMODEM

DFEP

SchedulePower

SchedulePower

IFIF FEPFEPX-band AntennaX-band Antenna

L0L0MODEMMODEM

DFEP

SchedulePower

SchedulePower

IFIF

Main Sub-elementsMODEM Demodulator and ModulatorFEP Front End Processor


Activities and Driving Principles

One Procurement Action

The bidder(s) need to provide a proposal compatible with the two sub-elements subject to delivery.

The bidder(s) need to cover the following activities:Design and Development activitiesAIV (Factory and on-Site) activitiesManagement activities involving the sub-element(s) subject to its bidding.

Driving Principles:The new development should be kept at minimum in favour of evolving existing units already available on the marketMulti-mission programmable demodulators (based on standards) and front end processing systems.


Quotation and Delivery

Core Stations ApproachThe bidder(s) need to deliver and support the integration for:

Initial number of units necessary for reference and validation platforms.Units for the Sentinel 1, 2 and 3 Core Stations (locations and number TBD).

The bidder(s) need to provide a quotation showing the benefits of scale:Purchase up to 4 recurrent units; purchase from 4 to 8 recurrent units; purchase from 8 to 12 recurrent units, etc.

The bidder(s) need to provide the quotation also for maintenance

Local Stations ApproachThe bidder(s) need to provide a quotation showing the benefits of recurrent units (including maintenance):

Available to Local Stations at recurrent priceAs an option, ESA could procure the units and provide them to the Local Stations


Sentinel PDGS

Precise Orbit Determination


The GMES Precise Orbit Determination (POD) Service shall provide orbit products to the

Sentinels 1, 2 and 3 missions for supporting the PDGS operations

GMES POD Service Objective


The GMES POD Service shall ensure the following functions for each of the Sentinel missions:

- NRT and OFL Orbit Products Computation

- GNSS In-orbit Sensor Performance Monitoring

- Long Term Monitoring & Validation of PDGS Orbits

- Orbit Reprocessing

GMES POD Service Functions


GMES POD System - Context

Two entities:- NRT POD- OFL POD

S-3 Specific


GMES POD Interfaces

Satellite & Receiver Info[mass, manoeuvres quaternions,

phase centres and clocks, attitude data (NAVATT),

receiver status, ...]

Environmental Data [leap seconds, gravity fields, ocean tides, solar flux,

geomagnetic indices, GIM, ...]

Measurements

LRR

DORIS Network

IGS Network

DORIS data

GPS data

Rapid (NRT) + Prelim./Precise (OFL)

Orbit Ephemerides

Reports[ops, QC]

ILRSNetwork

SLR data

S3 specific

On-board Receivers


The GMES POD Service shall :

- Be compliant and tailored to the mission specific objectives, error budgets, expected performance and availability requirements

- Rely on common and shared infrastructure and expertise

- Rely on specific expertise for OFL orbit processing (e.g. Altimetry)

- Be scalable for the integration of additional EO Sentinel Satellites

- Support to Integration and Verification Phases

GMES POD Project Objectives


- One single contract based for:

- Service Level Agreement based on an available POD Service Capability

- Delivery of NRT POD for integration in Sentinel PDGS=> No DPM provided as ESA CFI

=> Only Sat to ground ICD

- Incremental Delivery and Service Provision approach for each Sentinel mission

GMES POD - Procurement Approach


Sentinels PDGSS-2, S-3

Operational Instrument Processorsand Cal/Val and Quality tools


Procurement will cover :Processors for Sentinel-2 and Sentinel-3 products

IPF – Instrument Processing FacilityQuality Tools for Sentinel-2 and Sentinel-3

Cal/Val tools, QC tools

Sentinel-1 processor covered by previous contract(already initiated)

Procurement objectives


Sentinel-3: Optical Sensors Processing

L1 IPFOLCI

L1 IPF SLSTR

L1B

L1CCombined

OLCI/SLSTR

L1B

L1C IPF SLSTR/OLCI

L2 IPFOLCI

L2 IPF SLSTR

L2 IPF SLSTR/OLCI

Waterproducts

Land products

SST Land surface productSurface Directional Reflectances

Level 1IPFs

Level 2IPFs


Sentinel-3 : Altimetry Processing


Sentinel-2: Instrument Processor Facility

IPF L1

IPF L2

L1C orthorectified product

Atmospheric correction.

L1B

DEMCFI


Operational developmentESLs

Input from ESABaseline for IPF development

Detailed Processing Model L1 / L2 Input Output Data DescriptionTest data setGeneric Interface SpecificationECSS standard

NB: DPM / IODD / TDS provided by “Prototype contracts”

DeliveriesSoftware – code, exeDocumentation (Product specification,

Test reports, user manual, Software release note, Product Specification, ICD…etc)

Support, maintenance, expertise, commissioning phase support

IPF: Engineering approach

Algorithms Specification

Algorithms Engineering

S2 / S3 prototypes

S2 / S3 IPF

ESA

Algorithm Specificationsand prototyping

•Software•Processors ICDs

Algorithm definition and prototyping contracts Operational implementation contracts


IPF main inputLevel 0Aux files (including orbit files)Orders files

IPF main outputLevel 1 productsLevel 2 productsBasic Level 3 products

Browse / catalogue

Cal/Val and quality tools Calibration and validations functionsInitial analysis and monitoring functions Reporting functions

Procurement Scope


Procurement will be done through “Best Practices”

2 ITTs / within each core PDGS contract- IPF software development- Quality Tools software development,algorithm development and earth observationproducts expertise

Incremental procurement according to mission schedule Maintenance until end of commissioning phaseSupport to commissioning phase, maintenance of reference chain

Procurement Organization


Sentinels PDGS

Mission Planning


• Instrument Planning• On-board recording resource management

(packet store management)• Downlink Planning• Handling of multi-satellite constellation as single

resource• Support to local Stations• Support to EDRS• X-Band conflict handling to be solved outside

mission planning by operational agreements

Procurement Scope


• FOS interface: customized from Earth Explorer missions interface

• Mission Management Interface for ingestion of systematic observation requirements from GMES Service Providers

• User Service interfaces to be based on current multi-mission ICDs with possible customizations

• Station Interface to be based on multi-mission station interface with possible customizations

Mission Planning Interfaces


• variable on-board compression make location of actual downlink difficult to predict ==> mission planning probabilistic packet store management algorithm requires capability of stations and assembly centres to handle non-nominal scenarios

• MP was incorporated into the PDGS contract => "best practise" approach

• Output: fully operational system integrated in PDGS and support to commissioning phase

Mission Planning: S-1


Variable Compression Algorithm

• Mission Planning System will need to rely on an external library that evaluates the expected compressed size of each data take

• size evaluation has to be provided with a probabilistic approach (i.e. with 95% of probability the size will be smaller than ...)

• library to be provided as part of PDGS development ==> expert knowledge required


• separate MP system will be procured as separate competitive tender

• Output: – fully operational system– support to integrate the system into the PDGS– support to commissioning phase



• systematic planning, no conflict management due to user requests

• procurement as separate tender by Eumetsat



• ESA will provide mission CFIs for orbit propagation and for the ingestion of FOS orbit files

• S-1 On-board data compression algorithm description provided as CFI

Procurement CFI

Sentinels PDGS Demodulator and Front End...

Documents

Transcript of Sentinels PDGS Demodulator and Front End...