geoscience australia simon oliver remote sensing science and strategy modis development activities...
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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
0
500
1000
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2000
2500
3000
469 555 645 858 1245 1640 2130
Wavelength (nm)
Ref
lect
ance
(u
nsc
aled
)
MYD09GHK
MA2RG
Alluvium-1 2004303
0
500
1000
1500
2000
2500
3000
3500
4000
4500
469 555 645 858 1245 1640 2130
Wavelength (nm)
Ref
lect
ance
(u
nsc
aled
)MYD09GHK
MA2RG
Evergreen Forest-2 2004303
-500
0
500
1000
1500
2000
2500
469 555 645 858 1245 1640 2130
Wavelength (nm)
Ref
lect
ance
(u
nsc
aled
)
MYD09GHK
MA2RG
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
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