Tuesday, March 31, 2009

SeaDAS - Level-2 processing MODIS

What is SeaDAS


The SeaWiFS Data Analysis System (SeaDAS) is a comprehensive image analysis package for the processing, display, analysis, and quality control of ocean color data.

SeaDAS Screen Shot

Supported satellite sensors are
MODIS, SeaWiFS, OCTS, and CZCS.

SeaDAS Primary Functionalities

Processing programs:

SeaWiFS:
  • L1A, L1B, L2, L3, and SMI (Standard Mapped Image) processing
  • Map projection of L1, L2, and L3 files
  • L1 and L2 Browse product generation
  • L1A to L0 program for renavigation
  • Interactive L1 coastline registration and L2 QC
  • L1 subscene extraction
    		•
    MODIS:
  • L0 to L1A Direct Broadcast processing
  • L1A Geolocation processing
  • L1A subscene extraction
  • L1A to L1B processing
  • L1B to L2 processing
  • L2 and L3 binning
  • SMI processing
  • Map projection of L2 and L3 files
    		•
    CZCS:
  • L1A to L1B processing
  • L1 to L2 processing
  • L2 and L3 binning
  • SMI processing
    		•
    OCTS:
  • L1A to L1B processing
  • L1B to L2 processing
  • L2 and L3 binning
  • SMI processing
    		•


    SeaDAS Tutorials


    SeaWiFS Data Product Generation Programs:
    l1agen_seawifs Generate L1A file from L0 (HRPT) file
    l1bgen Generate L1B file from L0 (HRPT) file
    l2gen,0 Generate L2 file from L1A (GAC, LAC, HRPT) file
    l2bin/l3bin Generate L3 space- or time-binned files from L2 files
    smigen Generate L3 SMI standard mapped product from L3 binned data
    browse Generate L1A browse (Band 865nm) file or L2 browse (chlor_a) file
    bl1map Generate projected L1A HDF file
    bl2map Generate projected L2 HDF file
    bl3map Generate projected L3 HDF file
    l0regen_seawifs Generate L0 file from L1A (HRPT) file

    SeaWiFS Data Extraction and Quality Control Programs:
    l1aextract_seawifs L1A and L2 file extraction
    register L1A coastline registration and warping


    MODIS Data Product Generation Programs:
    l1agen_modis Generate L1A file from L0 (PDS) file
    l1bgen_modis Generate L1B file from an L1A and GEO file
    l2gen,4 Generate L2 file from L1B file
    l2bin/l3bin Generate L3 space- or time-binned files from L2 files
    smigen Generate L3 SMI standard mapped product from L3 binned data

    l2gen

    Description: This program performs Level-2 processing on MODIS, SeaWiFS, OCTS, or CZCS data and generates Level-2 geophysical products by applying atmospheric corrections and bio-optical algorithms to the sensor data. The input data levels required for l2gen processing are as follows:

    • MODIS: input must be an Aqua or Terra L1B file
    • SeaWiFS: input may be either an L1A or L1B file
    • OCTS: input must be either a NASDA-format L1B file or SIMBIOS-format L1B file
    • CZCS: input must be a CZCS L1B file

    For a thorough description of the full capabilities of l2gen and details on the UNIX command-line user interface, please refer to the L2GEN User's Guide.

    Please read more about l2gen..

    Level-2 Products Selection Window:


    Description: This window allows the user to select Level-2 output products for the output file specified in the l2gen main window.

    **************************************** download SeaDAS****************************
    SeaDAS 5.3 released

    MODISL1DB 1.5 released
    at 6:23 PM
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