1 / 18

Mid Decadal Global Land Survey Project

Mid Decadal Global Land Survey Project. briefing to the ScanEx RDC 3 rd International Conference, Earth from Space: The Most Effective Solutions presented by Steven Covington The Aerospace Corporation Landsat 7 Flight Systems Manager / Project International Coordinator /

avian
Télécharger la présentation

Mid Decadal Global Land Survey Project

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Mid Decadal Global Land Survey Project briefing to the ScanEx RDC 3rd International Conference, Earth from Space: The Most Effective Solutions presented by Steven Covington The Aerospace Corporation Landsat 7 Flight Systems Manager / Project International Coordinator / MDGLS Phase I Lead December 4-6, 2007

  2. The Landsat Satellite Family • Landsat 1-3 • First Civil Land Remote Sensing Missions • Flown from 1972 – 1982 • Primary Sensors: • Multi-Spectral Scanner (MSS) • Return Beam Vidicon (RBV) • Landsat 4 and 5 • Landsat 4 flown 1982 – 2002 • Landsat 5 from 1984 – Present • Primary Sensors • Multi-Spectral Scanner (MSS) • Thematic Mapper (TM) • Landsat 7 • Flown from 1999 – Present • Primary Sensor: • Enhanced Thematic Mapper Plus (ETM+)

  3. Mid-Decadal Global Land Survey • The USGS and NASA have worked together in the past to create three global surveys of the Earth’s landmass from orthographically-corrected satellite imagery centered on specific timeframes • Global Land Survey (GLS)1975, GLS1990 and GLS2000 • The objective of MDGLS is to extend this series with a new global land survey centered on a 2005-2006 epoch • The Project has 2 Dataset Production Phases: • Phase 1: satellite tasking, ground station coordination, scene selection, data transfer, and ingest into the USGS archive • Landsat 5 & 7 TM and ETM+ data will be the primary sources of data • Compatible ETM+ scenes will be used to makeup a composite pair • Other sensors: EO-1, ASTER, … • Phase 2: Process the collected data into an ortho-rectified dataset of virtually cloud-free scenes compatible with previous surveys

  4. Mid-Decadal Global Land Survey • Past Survey Coverage Statistics • 1970’s: 6,976 path/rows • 1990: 7,037 path/rows • 2000: 8,209 path/rows • MDGLS will increase total coverage to approximately 9,500 scenes • Inclusion of the Antarctic continent • Better accounting of islands and reefs • Full coverage of Arctic area in ‘ascending’ orbit • The MDGLS Scene Baseline includes 13,106 unique path/rows • This number includes Antarctica, but doesn’t exclude the geographic coverage overlap at high latitudes • Antarctica accounts for 3589 Path/Rows (~1200 unique coverage) • The final MDGLS unique scene count should be in the range of 9300 path/rows

  5. Scene Selection Criteria • Mid-decadal acquisition period of 2004-2007 • (2005-2006: Prime) • Cloud Cover ≤ 10% • ETM+ SLC-Off Composite Pair filler targeted at ≤ 5% • Landsat 7 Gap Closure of > 95% • Assumes the allowance of a 2-pixel interpolation • Coverage Seasonality • Green Season: a date criteria was developed that matched the period when the NDVI was within 40% of its maximum value and dynamic range • Efforts are made to match acquisition dates with previous surveys to aid in land cover change analysis

  6. MDGLS Baseline Coverage Green = GeoCover 2000 Coverage Red = New MDGLS Coverage

  7. Landsat 5 International Cooperator Ground Station Coverage

  8. MDGLS Campaign Station Locations Magadan The Malindi and Yucatan stations came into service too late for inclusion in the GLS2005 dataset

  9. Landsat 5 Global Archive Accessibility Tested Capability Untested, but Compatible

  10. Landsat 5 Coverage in US Archive Each of these areas meet initial coverage requirements based on metadata

  11. Archived L7 ETM+ Coverage Meeting Specification* Green = 2005/2006 Coverage Yellow = 2004/2007 Coverage * Meets metadata standards, but may not be suitable for inclusion in the survey dataset

  12. Before Production Begins… • The USGS and NASA have funded the reprocessing of the Tri-Decadal datasets (GeoCover) to improve the geometric accuracy • Terrain correction is being updated with Shuttle Radar Topography Mission (SRTM) data • Production process is being improved • Reducing the number of error-producing tie-points between individual blocks • The products are now resampled to 15/30/60(120) meters • This reprocessing is now underway • The 2000, 1990 and 1975 surveys will each be reprocessed • The reprocessed data will be made available at no charge as it becomes available • This new and improved dataset will be used as control for all future Landsat product ground control - including the GLS2005

  13. Production Sequence LGGS Delivery/MDGLS Processing: Landsat archive Order IC Stations Campaign Stations North America Canada Chetumal 1 Caribbean Chetumal 2 Africa, Madagascar South Africa Maspalomas 3 Eurasia China Japan* Thailand Kiruna, Moscow, Irkutsk, Magadan 4 Australia Australia 5 New Zealand Australia 6 South America Argentina Brazil Chetumal 7 Indonesia Indonesia Thailand 8 Greenland Kiruna 9 Japan Japan* China 10 Iceland Kiruna 11 Islands 12 No issues ETM+ product will begin production in early 2008 TM products will begin production in mid-2008 All production completed by end of 2008 Likely to proceed; issues in work Unlikely at present; issues in work * Ingest capability unknown

  14. Global Land Survey Distribution Policy • Individual products will all be made available online at no charge • Products will become available soon after production • Contributors to the Mid Decadal GLS2005 dataset will receive a complete copy once production is complete • All GLS data is available through the USGS for download at no charge • Go to http://glovis.usgs.gov/ • For the Scene Collection, Choose ‘Landsat Decadal’

  15. Landsat Data Distribution Policy Update • Select ETM+ data are being distributed at no charge as part of a Landsat Data Continuity Mission pilot project • What’s Included: • New ETM+ acquisitions with less than 20% cloud cover and quality scores of ’99’ from the US and Territories • More geographic area will be added over the next 6 months, eventually leading to global coverage • Expanding Options • It is planned that by the end of Calendar 2008, all newly acquired SLC-off scenes will be made available for no charge using the standard product specification • Additional datasets will eventually be added, including • Landsat 7 ETM+ SLC-on • Landsat 4/5 TM • Landsat 1-5 MSS

  16. Standard Product Specification • Pixel size: 15m/30m/60m(14.25/28.5/57m) • Media type: Download (no cost), CD/DVD ($50) • Product type: L1T (terrain-corrected) • Output format: GeoTIFF • Map projection: UTM • Orientation: North up • Resampling: Cubic convolution • Publically available terrain data used to produce Global Land Survey products will be made available at no charge

  17. Other Developments • The Landsat Data Continuity Mission (LDCM) is scheduled for launch in mid-2011 • It is currently planned that data products following the ‘standard specifications’ are made available at no charge • The U.S. Government is standing up a new organization; the National Land Imaging Program (NLIP) • This Program will be responsible for collection of civil land remote sensing data for the US archive • The Department of the Interior will manage the program • A main goal of NLIP will be to ‘operationalize’ collection of Landsat-class observations

  18. Thank You

More Related