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Transcript of Www.earthobservations.org SDCG-4, Pasadena, CA/USA September 4-6, 2013 SDS-4 Session 2 Mission...
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SDCG-4, Pasadena, CA/USASeptember 4-6, 2013
SDS-4 Session 2Mission updates
ALOS-2
JAXA
Masanobu Shimada
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SDCG-4, Pasadena, CA/USASeptember 4-6, 2013
Mission <ALOS-2> Launch and commissioning
• Status / launch date:– Satellite assembly in progress, PALSAR-2 on ground test, satellite-
ground facility interface test, on-schedule.– Targeting Early 2014 launch
• Commissioning Phase duration– Six months after the launch (initial mission check + Initial CALVAL)
• Expected timing to enter operational status– 7th month after the launch
• Expected life time– 7 years
• Data policy (if known): not decided yet.• Any other info: 379 PIs for ALOS-2 research announcement
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SDCG-4, Pasadena, CA/USASeptember 4-6, 2013
Mission Objectives of <ALOS-2> Acquisition strategy
• Disaster Monitoring• - quick access to damaged areas and continuous
monitoring• - InSAR for deformation• Land Monitoring
• - generate systematic archive• - sea ice monitoring
• Agricultural Monitoring• - evaluation of irrigated rice fields
• Natural Resource Exploration• - detecting oil slick over sea • - analysis of geology and topography
• Global Forest Monitoring• - deforestation monitoring
• Potential Use• - maritime safety
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SDCG-4, Pasadena, CA/USASeptember 4-6, 2013
Mission <ALOS-2> Acquisition strategy
• Capacity to accommodate GFOI acquisition requests (in accordance with Baseline Strategy [Element-1] Implementation Plan)
• Capacity to augment plan “on the fly”– Twice a year global coverage by 10m Dual (28MHz) Strip and more
frequent ScanSAR (350km) Dual observations are mostly used for quick-monitoring.
• Technical constraints (recorder capacity, downlink, etc.): – Availability of DRTS for one year after the launch– Continuous Downlinking using the Svalbird Ground station
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SDCG-4, Pasadena, CA/USASeptember 4-6, 2013
Mission <ALOS-2> Data processing
• Processing levels : L1.1(SLC-IEEE), 1.5(geocoded amp, 16bit-amp), 2.1(Ortho-16bits-amp), 3.1(noise reduced)
• Data formats: CEOS/GEOTIF– http://www.eorc.jaxa.jp/ALOS-2/en/doc/format.htm
• Means for data distribution:– AUIG-2 based ordering and distribution, primary FTP down
loading and exceptionally DVD distribution
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L-band SAR antenna X-band downlink antenna
Solar Arrays
Data relay antenna
Specification
ALOS-2 satellite
L-band SAR (PALSAR-2)
Stripmap: 3 to 10m res., 50 to 70 km swathScanSAR: 100m res., 350km/490km swathSpotlight: 1×3m res., 25km swath
Orbit
Sun-synchronous orbitAltitude: 628kmLocal sun time : 12:00 +/- 15minRevisit: 14daysOrbit control: ≦+/-500m
Life time 5 years (target: 7 years) Launch JFY2013, H-IIA launch vehicle
Downlink
X-band: 800Mbps(16QAM)400/200Mbps(QPSK)Ka-band: 278Mbps (Data Relay)
ALOS-2 in-orbit configurationALOS-2 in-orbit configuration
XY
Z
Experimental Compact InfraRed Camera (CIRC) SPace based Automatic Identification
System Experiment(SPAISE2)
Phase D
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Data Analysis System(Cal/Val, Algorithm development, Science)
USB ( TLM,RNG )
Antennaprediction
RNG
USB ( CMD,RNG )
USB ( TLM,RNG )X ( Mission )
USB( CMD,RNG )
USB ( TLM,RNG )X ( Mission )
USB( CMD,RN
G ) Ka ( CMD,RNG ) Ka ( TLM,RNG )
Ka ( Mission )
CMDCMDCMDCMD
TLM
Katsuura JAXA GN
GPS data
Observation Request
USER Observation Request
Product
Observation Request
Product
Trajectory information
Level 0/1 data
Mission data
Svalvard (KSAT)(Back up)
Ground station ofother organization
Trajectory information
X ( Mission )
Satellite Control & Mission Operation System
ALOS-2
Antennaprediction
Antennaprediction
Antennaprediction
Flight Dynamics System
Data relay satellite
Calibration coefficient ,Algorithm
Level 0/1 data
Other Space Agency
Information System(Tasking, Collection, Processing, Exploitation and Dissemination)
Hatoyama(Back up)
X( Mission )
JAXA SN(Tsukuba, Hatoyama)
: ALOS-2 system
: Tracking network
Antennaprediction
Trajectory information
ALOS-2 Ground System
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PALSAR-2 Specification
Mode Spotlight Ultra FineHigh
sensitiveFine
ScanSARnominal
ScanSARwide
Bandwidth 84MHz 84MHz 42MHz 28MHz 14MHz 28MHz 14MHz
ResolutionRg×Az :
3×1m3m 6m 10m 100m(3 looks) 60m(1.5 looks)
SwathRg×Az :25×25km
50km 50km 70km350km5scan
490km7scan
Polarization SP SP/DP SP/DP/FP/CP SP/DPNESZ -24dB -24dB -28dB -26dB -26dB -23dB -23dB
S/ARg 25dB 25dB 23dB 25dB 25dB 20dBAz 20dB 25dB 20dB 23dB 20dB 20dB
Spotlight : Detail observation of damaged area Ultra Fine: High Resolution map (Japan area baseline)High sensitive: Flood / Coast monitoringFine: Global observation (deformation/forest)ScanSAR nominal : ScanSAR InSAR (28MHz)ScanSAR wide: Ice monitoring, Ship detection
SP : HH or VV or HV , DP : HH+HV or VV+VH , FP : HH+HV+VH+VV , CP : Compact pol (Experimental mode)
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Global Observation by ALOS seriesFrom experiences of the ALOS operation, a
systematic observation strategy to achieve consistent data acquisitions in time and space was crucial
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Systematic Observation strategies (Basic Observation Scenarios) have been developed and implemented by JAXA for 20 years:
• JERS-1 SAR (1995-1998: Pan-tropical, Pan-boreal)• ALOS PALSAR (2006-2011: Global)• ALOS-2 PALSAR-2 (Under development.: Global)
Basic Observation Scenario(BOS)
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SDCG-4, Pasadena, CA/USASeptember 4-6, 2013
Basic Observation Scenario (Global)
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•Descending acquisitions (noon, ~12:00)- To observe globally with Stripmap (3m) mode once per
three years- To observe Wetland and Forest with ScanSAR mode - To observe Deformation and Forest with successive two
cycles for INSAR application
•Ascending acquisitions (midnight, ~24:00)- To observe globally with Stripmap (10m) mode twice a
year- To observe polar region with ScanSAR mode more than
twice a year to cover summer/winter times. Antarctica will be observed by left look to cover higher latitude.
- To observe globally with Stripmap (6m Quad pol) mode once per four years
- To observe supersites with Stripmap (6m Quad pol) mode every year
•Descending acquisitions (noon, ~12:00)- To observe globally with Stripmap (3m) mode once per
three years- To observe Wetland and Forest with ScanSAR mode - To observe Deformation and Forest with successive two
cycles for INSAR application
•Ascending acquisitions (midnight, ~24:00)- To observe globally with Stripmap (10m) mode twice a
year- To observe polar region with ScanSAR mode more than
twice a year to cover summer/winter times. Antarctica will be observed by left look to cover higher latitude.
- To observe globally with Stripmap (6m Quad pol) mode once per four years
- To observe supersites with Stripmap (6m Quad pol) mode every year
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Basic Observation Scenario(BOS)
Acquisition ConceptsSpatial and temporal consistency over continental scales at fine resolutionAdequate revisit frequency (including INSAR) Accurate timing Consistent sensor configurationLong-term continuity
The observation strategy of PALSAR-2 aims to provide spatially and temporally consistent, multi-seasonal global coverage, on a repetitive basis during the life-time of the ALOS-2 satellite.
GoalComprehensive and homogeneous global archive of
PALSAR-2 data
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SDCG-4, Pasadena, CA/USASeptember 4-6, 2013
Japan BOS
• To meet requirements from a large number of domestic organisations and user groups
• Covering all Japan land and sea territory
Global BOS
• Global observations over all land areasat least semi-annual (dual-season)at least dual-polarisation
• Higher temporal repeat frequency for specific applications (e.g. crustal monitoring; volcanoes; agriculture; wetlands; deforestation hotspot regions; etc.)
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Japan and global BOS
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SDCG-4, Pasadena, CA/USASeptember 4-6, 2013
Global land areas – baseline mapping
Temporal repeat: 2 cov/year
GSD: 10 m
Mode: Stripmap Dual-pol (HH+HV)
Prio 1Prio 2
Basic Observation Scenario (Global)
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SDCG-4, Pasadena, CA/USASeptember 4-6, 2013
Global land areas – VHR mapping
Temporal repeat: 1 cov/ 3 years
GSD: 3 m
Mode: Stripmap Single-pol (HH or HV) (TBD)
Prio 1Prio 2
Basic Observation Scenario (Global)
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SDCG-4, Pasadena, CA/USASeptember 4-6, 2013
Global land areas – Quad polarimetry
Temporal repeat: 1 cov/ 5 years
GSD: 6 m
Mode: Stripmap Quad-pol (HH+HV+VV+VH)
Basic Observation Scenario (Global)
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SDCG-4, Pasadena, CA/USASeptember 4-6, 2013
Forest monitoring
Temporal repeat: 2-6 cov/year (tropics 6 cov)
GSD: 10 m
Mode: Stripmap Dual-pol (HH+HV)
Basic Observation Scenario (Global)
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SDCG-4, Pasadena, CA/USASeptember 4-6, 2013
Wetlands & Rapid deforestation monitoring
Temporal repeat: 9 cov/year
GSD: 100 m
Mode: ScanSAR 350km Dual-pol(HH+HV)
Basic Observation Scenario (Global)
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SDCG-4, Pasadena, CA/USASeptember 4-6, 2013
Crustal Deformation
Temporal repeat: 2-6 cov/year & 9 cov/year
GSD: 10 m & 100 m
Mode: Stripmap Dual-pol (HH+HV) & ScanSAR 350km (HH+HV)
Basic Observation Scenario (Global)
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SDCG-4, Pasadena, CA/USASeptember 4-6, 2013
Polar Ice
Temporal repeat: 3 cov/year
GSD: 100 m
Mode: ScanSAR (HH or HH+HV) (TBD)
Right lookLeft look
Basic Observation Scenario (Global)
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SDCG-4, Pasadena, CA/USASeptember 4-6, 2013
Observation pattern for annual acquisitions *
10m DP (HH+HV) 6m QP (HH+HV+VV+VH) 3m SP (HH or HV)
100m WB (HH+HV) 100m WB (HH+HV) 100m WB HH+HV 350km (Right) 490 km (Right)
490km (Left)* 3m SP and 6m QP modes require 3 and 4 years for
global coverage
Basic Observation Scenario (Global)
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