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Published byHenry Dennis Modified over 9 years ago
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Geoscience Australia Simon Oliver Remote Sensing Science and Strategy MODIS Development Activities at ACRES Australian Government Geoscience Australia
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Overview MOD09 Surface Reflectance Direct Broadcast implementation SEADAS L1 processor Toward SMAC (Simplified Method for Atmospheric Correction) Vegetation Indices (NDVI / EVI) Compositing (1day / n-day)
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Geoscience Australia MOD09 DB implementation Download from NASA Direct Readout Lab *note – not latest institutional code Install SDP Toolkit (provides routines to MOD09) GBLAV (surface pressure and temperature) and AVN ozone data sets in lieu of GDAS and OZ_Daily products for NRT MOD021KM, HKM, QKM and MOD03 geolocation - MOD035 cloud mask is optional Requires ozone estimate and forecast data preceding and following pass time – linear interpolation Routines for ftp retrieval of these included in DB port
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Geoscience Australia MOD09 DB implementation Hints Direct Broadcast Test data not on DRL Implement SEADAS first (easier to integrate than IMAPP outputs) Integration with SEADAS requires minor software patch to metadata check & remake PCF can be picky and difficult to configure so look here first
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Geoscience Australia MOD09 DB implementation Progress ACRES product run successfully (SEADAS inputs) Swath to Grid for re-projection Go to production once test processing complete
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Geoscience Australia MOD09 Surface Reflectance
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Geoscience Australia MOD09 DB implementation Comparison MODIS DB Surface Reflectance comparison with LPDAAC products
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Geoscience Australia SEADAS SEADAS4.8 not configured for current ACRES MODIS L1B output file content i.e. single L1B file output. Modl1db version enables 250m, 500m and 1000m product separation. Installation simple – substitution in ACRES IMAPP workflow straightforward IMAPP Terrain correction bug fixed in SEADAS
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Geoscience Australia PDS SEADAS MOD09 CLOUDMASK MRTSwath (project) Ldope (Mask Creator) Surface Reflectance Cloudmask Mask1 Swath angle Mask2 NDVI EVI Composite Tool 1 day or n days Composite Tool requirements -Maximum value from stack -Exclude cloud (Mask1) -Exclude swath angle > 45 from nadir -Include closest to nadir NDVI EVI Land/Sea Mask3
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Geoscience Australia Toward SMAC In ACRES MODIS development environment University of Wisconsin MOD07 Profiles implemented MOD04 Aerosol implemented MOD05 WVNIR (Water vapour ) implemented Integration with DLI’s SMAC routine not attempted (pre-processing requirements) MOD09 development to parallel SMAC (potential for application to other ACRES products)
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Geoscience Australia Sentinel Developments Adding supplementary datasets to current Sentinel website NDVI and EVI from Rapid Response DB software (NASA DRL) L1B / MOD09 mosaicking/compositing (currently with HDFLook) Compositing mechanisms to be developed in-house to constrain view angle, remove cloud pixels and determine maximum pixel value
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Geoscience Australia EVI composite
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Geoscience Australia Sentinel Developments - others DLI MODIS Night Fire Implementation AVHRR / CSIRO hotspot algorithm implementation – IDL and C
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