1. ASTER Operation Scenario and Status Y. Yamaguchi (Nagoya Univ., Japan) M. Fujita, T. Tachikawa, M. Kato, H. Tsu ( ERSDAC, Japan), M.J. Abrams, L. Maldonado (JPL, U.S.A.) IGARSS 2011, July 28, 2011 Vancouver, Canada
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5. Multiband Observation of Mt.Etna Imaged on May 7, 2000 6km ASTER VNIR RGB : 3,2,1 ASTER SWIR RGB : 9,5,4 ASTER TIR Band 13 Snow (high albedo) Fumarole Lava (high temp.) Lava (high temp.) Snow (low temp.) Lava (low albedo) Snow (low albedo)
16. Global Mapping (GM-3) □ GM3H : Area 67,688,813 km 2 □ GM3M : Area 64,472,470 km 2 □ GM3L : Area 47,787,553 km 2 Life Time: 2006/03/27-2010/04/01 Observation Condition Cloud < 20 %, Day, Full Mode, Sun Angle: 40-90°
17. Global Mapping Lifetime Target Areas Observation Parameters GM-1 Dec. 2000 to Mar. 2006 All land + coastal areas (High, medium, low priority areas) Depend on the priority, surface type, season, latitude, etc. GM-2 Aug. 2003 to Mar. 2006 Selected areas (GM-1 high priority areas only) Similar to GM-1, but relaxed the sun elevation condition GM-3 Mar. 2006 to Oct. 2009 All land + coastal areas (High, medium, low priority areas, GM-1 high priority areas extended) Same as GM-2 GM-4 Oct. 2009 to Apr. 2015 Same as GM-3 Same as GM-2
18. GM Daily Observation Scenes As of Nov. 24 th ,2010 63,253 10,730 54,868 13,067 93,063 GM1 2000-10-05 to 2006-03-29 GM2 2003-08-30 to 2006-03-29 GM3 2006-3-30 to 2009-09-30 84,830 76,230 GM4 2009-10-1 to 2015-4-1
20. TIR Nighttime Global Mapping (TGM) □ AOI of TGM1, Life Time: 2004/12/01 – 2006/08/31 □ AOI of TGM2-1, Life Time: 2006/04/01 – 2010/04/01 □ AOI of TGM2-2, Life Time: 2007/04/01 – 2010/03/31 □ AOI of TGM2-3, Life Time: 2008/01/10 – 2009/04/01 □ AOI of TGM2-4, Life Time: 2008/04/11 – 2009/04/01 Observation Condition AvoidCloud : NO, Night, TIR only Mode
21. ■ TGM3 70.3 % ■ TGM4 17.3 % Achievement ■ < 20 % ■ 50 to 80 % ■ 20 to 50 % ■ > 80 % TIR Nighttime Global Mapping (TGM-3, 4)
22. Operation Scenario and Status (3) Gap Filler For the areas where cloud-free ASTER imagery has never been acquired. We identify the target areas and submit STAR every half a year.
23. Observed Scenes of Gap Filler 2011 Observation Condition Avoid Cloud : 10 %, Day, Full Mode, Sun Angle:20-90 ° ■ 8 s cenes with Cloud Coverage < 10 % ■ 140 o bserved Scenes ■ AOI of Under-served Area STAR Life Time: 2011/05/01 – 2011/12/01 As of June 1 st ,2011
24. Operation Scenario and Status (4) Underserved Area STAR For the areas where 3 times or less cloud-free ASTER imagery has been acquired. The target areas were identified in the GDEM processing.
25. Underserved Area STAR Observation Condition Cloud < 20 %, Day, Full Mode, Sun Angle : 40-90°or 20-90° □ Underserved Area : 21,609,180 km 2 UA2008 : Life Time:2008/12/27-2010/03/11 UA2010 : Life Time:2010/03/03-2015/01/01
26. Achievement of Underserved Area STAR 2010 Achievement ■ < 20 % ■ 50 to 80 % ■ 20 to 50 % ■ > 80 % Observation Condition Cloud < 20 %, Day, Full Mode, Sun Angle : 40-90°or 20-90° 75.6% as of June 1 st ,2011
28. Concluding Remarks The ASTER instrument has been acquiring data since January 2000, and has obtained more than 2 million scenes. ASTER operation scenario is carefully designed to maximize data acquisition. The ASTER SWIR subsystem is not functioning now due to the SWIR cryocooler malfunction.
29. To get ASTER Data http://www. ersdac.or.jp/ https://lpdaac.usgs.gov/ ASTER Homepage http://www.ersdac.or.jp/ http://asterweb.jpl.nasa.gov/ Thank you for your attention.
Editor's Notes
It is necessary to grasp closed areas including poorly observed areas in order to submit STAR over them. At first, poorly observed areas were considered in comparison among cloud coverage maps of 0%,1%,2%,5%,10% and 20%. The bigger percentage of cloud coverage, the wider red areas. It means that observed areas increase with the percentage of cloud coverage. If too small percentage of cloud coverage is adopted, extracted area as poorly observed areas could not contain all poorly observed areas. If too big percentage of cloud coverage is adopted, extracted area as poorly observed areas would include observed areas. There was no way to theoretically decide the most suitable cloud coverage percentage. The cloud coverage map of 10% was adopted tentatively because it was considered as being not much different from the most suitable percentage.
This slide shows AOI of GM3. Global Mapping has been working since start of ASTER observation. Its object is to cover all global land. Now its project is working in the 3rd round, then called GM3. GM3 consists of 3 categories with different priority such as GM3H, GM3M, GM3L, colored red , blue and green respectively on the slide. GM3 started in April, 2006, and is still working. GM3H: Global Mapping 3rd Round High Priority GM3M: Global Mapping 3rd Round Medium Priority GM3L: Global Mapping 3rd Round Low Priority
Night TIR STAR This slide shows AOI of TGM. Life time of TGM 1st round was already expired, while TGM2 & TGM2-2 are still alive. Areas of TGM2 & TGM2-2 are assigned for different areas divided with Longitude of 0 and nearly 90 degree W. TGM2 started in April, 2006. TGM2-2 started in April, 2007.
This slide shows AOI of GM3. Global Mapping has been working since start of ASTER observation. Its object is to cover all global land. Now its project is working in the 3rd round, then called GM3. GM3 consists of 3 categories with different priority such as GM3H, GM3M, GM3L, colored red , blue and green respectively on the slide. GM3 started in April, 2006, and is still working. GM3H: Global Mapping 3rd Round High Priority GM3M: Global Mapping 3rd Round Medium Priority GM3L: Global Mapping 3rd Round Low Priority