MODIS Direct Acquisition, Processing and CRISP KWOH, Leong Keong Director, CRISP APEIS Capacity Building Workshop on Integrated Environmental Monitoring of the Asia-Pacific Region September 2002, Beijing, China CRISP Centre for Remote Imaging, Sensing and Processing
Overview Introduction Processing Levels Level-0 Processing –Browsed Image Generation –CRISP’s MODIS Web Cataloging System Level-1 Processing –NASA software Vs. IMAPP –MODIS Georectification Recent Application Conclusion and Future Developments
Status of CRISP MODIS Data Reception First Reception of TERRA MODIS – 3 March 2001 First Reception of AQUA MODIS – 15 July 2002 Processing system currently used – IMAPP v 1.4 (beta) Computing Platform – PC running LINUX CRISP Centre for Remote Imaging, Sensing and Processing
13 metre X band Antenna 6 metre X band Antenna TERRA / AQUA data received if either one of the antenna is available. Either antenna can be used.
The first MODIS captured by CRISP on 3/3/2001
First MODIS image received and processed by CRISP – 3 March 2001 )
Processing Levels Two main levels –Level-0 Processing Frame Formatting Software developed by CRISP Catalogue Software RAW data archived on DLT –Level-1 Processing NASA GSFC level 1 processing software International MODIS/AIRS Processing Package (IMAPP) by University of Wisconsin Higher level processing –Georectification developed in CRISP
Level 0 Processing TERRA / AQUA X-Band Antenna Demodulator (Alcatel Omnisat) Downlinked Raw format Recorded on Hard disk (Datron DIS) MODIS CCSDS Packets GBADPackets Browse Image FrameSync & Reformat with RS correction (AQUA only)
Generate Browse Image A program is written to generate browse images directly from the MODIS PDS file. The program incorporate some simple geometry to “flatten’ the image and remove “bowtie” effect. The browse images is then fed into on our web catalogue system. The acquisition, archival, browse image generation and catalogue updating are performed automatically.
Before Flattening After Flattening Image Captured on 4 July 2001 Image Captured on 4 July 2001 (SWIR, NIR, RED)
CRISP’s MODIS Web Catalogue (crisp.nus.edu.sg)
TERRA Day Image
Night Image
AQUA Image
Level 1 Processing Two versions of level-1 processing has been used –International MODIS/AIRS Processing Package (IMAPP) –NASA GSFC MODIS level 1 Processing Software
Constructionrecords PDS File MOD01MOD02 MOD03 Level 1a Level 1b Geolocation NASA Software IMAPP GBAD File (AQUA Only)
Georectification
Georectification
Terra MODIS image on 4 July 2001 Hot Spots Derived from MODIS image
Forest Fire in Sumatra, 4 July 2001
SPOT Fire Locations A N E B N E C N E MODIS Hot Spots N E N E N E N E MODIS Hot Spots validated with SPOT fires
SPOT Fires D N E E N E F N E G N E H N E MODIS Hot Spots N E N E N E N E N E N E N E N E N E
Conclusion and Future Developments CRISP has implemented an end to end MODIS DB reception, archival and processing system. Automatic processing, from level 0 processing, catalogue updating to level 1 processing and further georectification are performed. We are currently developing numerous applications for MODIS such as Cloud Mask, 8- days Cloud Free Composite, Fires detection and Ocean applications.