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

1500

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