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USGS Landsat Program Status February 5, 2005

USGS Landsat Program Status February 5, 2005. USGS Landsat Mission Status. Landsat 7 Current end of life projection is 2010-2011 Fuel limited Scan Line Corrector (SLC) failure Landsat 5 Current end of life projection is 2009 Fuel limited

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USGS Landsat Program Status February 5, 2005

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  1. USGS Landsat Program StatusFebruary 5, 2005

  2. USGS Landsat Mission Status • Landsat 7 • Current end of life projection is 2010-2011 • Fuel limited • Scan Line Corrector (SLC) failure • Landsat 5 • Current end of life projection is 2009 • Fuel limited • Working on obtaining a variance to extend mission life

  3. USGS Landsat Goals • Extend both missions as long as possible • Minimize potential data gap • Continue to make the SLC-off data as useful as possible to as many Landsat data users as possible

  4. Landsat 7 ETM+ SLC-Off New Product Development Status (Phase 1) • Results: • Selected localized histogram matching method for Phase 1 SLC-off to SLC-on gap-filled products • Method implemented excludes high and low saturations • Use zero-interpolated versus standard two-pixel interpolated product as input • The corrective gain between two datasets is found using the ratios of the standard deviation of the datasets. The corrective bias is then calculated as the offset between the datasets’ gain-adjusted means. This method is being implemented in Phase 1 versus a linear fit procedure. • Phase 1 SLC-off to SLC-on gap-filled product released 10 May 2004 • Included gap pixel mask (binary) • Also released user selectable interpolation and annotated browse on user interface

  5. Landsat 7 ETM+ SLF-Off New Product Development Status (Phase 2) • Results: • Selected localized histogram matching method for phase 2 SLC-off to SLC-off gap-filled products • Same as Phase 1, method excludes high and low saturations and uses zero-interpolated versus standard two-pixel interpolated product as input • Implemented linear regression for histogram matching • Implemented adaptive window processing based on a threshold for the minimum number of common pixels • Also added a test for output pixel saturation and a threshold test on the computed gain • Phase 2 SLC-off to SLC-off gap-filled product released 18 Nov 2004/16 Dec 2004 • Included gap pixel mask with all input products explicitly identified • GPS generation for all new data and began reprocessing of data on 28 October 2004 working backwards • Began generation of enhanced browse using hybrid (3X subsampling/2X wavelet)reduction technique • Completed nearly 10 cycles (160days) of reprocessing

  6. Phase 2 Poster

  7. USGS Landsat Data Continuity Mission Status • Landsat Data Continuity Mission (LDCM) had the following priorities: • Commercial Enterprise – meetings and survey indicated lack of industry interest • Commercial/Government Partnership – procurement canceled due to inappropriate risk balancing • International Partnership – post LDCM? • Government Only – Administration has chosen to place it on the NPOESS (National Polar-Orbiting Environmental Satellite System)

  8. USGS Landsat Data Continuity Mission Status • Current Status • NASA is conducting a study to understand cost/schedule/risk for integration on NPOESS 2130 spacecraft • Earliest launch data is estimated to be end of CY2009 • NPOESS launch will change: • WRS Path/Row Map, Altitude, Calibration, etc. • Input on scientific thoughts/opinions are welcomed by the USGS • LDCM Point of Contact Chris Doescher USGS LDCM System Engineer cdoesh@usgs.gov

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