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SDCG-5 Session 4 Element 3 (R&D support) Intro

SDCG-5 Session 4 Element 3 (R&D support) Intro. Gene Fosnight. Element 3 – R&D support. Discussion points Data to complement core data streams DEM alternatives – the search for the perfect DEM Low resolution space data – where next after MODIS High resolution space data SAR space data

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SDCG-5 Session 4 Element 3 (R&D support) Intro

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  1. SDCG-5 Session 4Element 3 (R&D support)Intro Gene Fosnight

  2. Element 3 – R&D support Discussion points • Data to complement core data streams • DEM alternatives – the search for the perfect DEM • Low resolution space data – where next after MODIS • High resolution space data • SAR space data • Field and airborne data • Managing temporal data • WELD

  3. Element 3 – R&D support State of DEM • 90m SRTM version 3 (2013) • 30m ASTER GDEM version 2 (v3 2014) • V2 used 1,500,000 stereo pairs • V3 uses additional 500,000 stereo pairs • 90m WorldDEM (?) • 30 m NASADEM (2017) • Jan-Peter Muller presented “Global DEM : why do we need it, what do we need and how can we achieve these requirements” at the CEOS WGCV meeting. Good overall summary of data and data requirements

  4. Element 3 – R&D support MODIS future alternatives for early warning of change • Sensors • MODIS • AVHRR • VIIRS • Sentinel-3 • Product continuity is key • As with Landsat, Sentinel-2 and CBERS, an intercomparable suite of calibrated products is needed to support change, which is critical for high temporal resolution data • NASA has a major funding initiative to support the development of VIIRS products compatible with MODIS products

  5. Element 3 – R&D support Temporal data management and the state of WELD • Global WELD • http://globalmonitoring.sdstate.edu/projects/weldglobal/ • http://globalmonitoring.sdstate.edu/projects/weld/ • Temporal stacking – Weld maintains source data • Cloud compositing – explicit and well defined methodology • Importance of absolute and cross calibration • Importance of cloud and shadow detection • Importance of maintaining knowledge of time…

  6. Web-Enabled Landsat Data –2006 - 2010

  7. Global WELD 2010

  8. Dec. 2009 Jan. 2010 Feb. 2010 April 2010 May 2010 March 2010 June 2010 July 2010 August 2010 Oct. 2010 Nov. 2010 Sept. 2010

  9. Web-Enabled Landsat Data –2006 - 2010 • Landsat Data from USGS archive at EROS • WELD NASA-funded development at South Dakota State University • Processed at NASA Ames Research Center using NEX • Data disseminated from NASA Land Processing DAAC at EROS • USGS evaluating best way forward for tiling and WELD-like products

  10. Provisional WELD data distribution through NASA LPDAAC • 2010 • June 2014 • 2000 & 2005 • 4th quarter 2014 • 1985, 1990 & 1995 • unscheduled

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