Geoscience Australia Simon Oliver Remote Sensing Science and Strategy MODIS Development Activities...
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Transcript of Geoscience Australia Simon Oliver Remote Sensing Science and Strategy MODIS Development Activities...
Geoscience Australia
Simon OliverRemote Sensing Science and Strategy
MODIS Development Activities at ACRES
Australian Government
Geoscience Australia
Geoscience Australia
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)
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
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
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
Geoscience Australia
MOD09 Surface Reflectance
Geoscience Australia
MOD09 DB implementation Comparison
• MODIS DB Surface Reflectance comparison with LPDAAC products
Grassland/Herbaceous-1 2004303
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Alluvium-1 2004303
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Evergreen Forest-2 2004303
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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
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
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)
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
Geoscience Australia
EVI composite
Geoscience Australia
Sentinel Developments - others
• DLI MODIS Night Fire Implementation• AVHRR / CSIRO hotspot algorithm
implementation – IDL and C