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

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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