Announcement: MODISL1DB 1.2 Released

MODISL1DB 1.2 is now available for the MODIS DB community via: http://oceancolor.gsfc.nasa.gov/seadas/modisl1db/. MODISL1DB is a MODIS Level-1 Direct Broadcast software package capable of processing Aqua and Terra Level-0 data to Level-1A and Level-1B.

If you have already installed a previous version of MODISL1DB, simply install MODISL1DB 1.2 in a new directory and point your DBHOME environment variable to this new directory. If you already have the digital elevation maps, there is no need to re-download them. You can simply move them into the new $DBHOME/data/modis/dem/ directory or create a symbolic link that points to them.

See below for bug fixes and new features.

-Best regards from the Ocean Biology Processing Group!-

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MODISL1DB 1.2 CHANGES
=====================

The major change in this update is the addition of a new MODIS L1A
1km extraction tool. (Work is in progress to support HKM/QKM
extractions.) Given two latitude/longitude corners of a geographic
box, the new modis_L1A_extract.csh script will extract data within the
box, creating a subscened L1A file and an optional corresponding GEO
file. The new L1A/GEO subscene can then be processed to an L1B file in
the usual way. Unlike the L1A file, the resulting subscened L1B file
will be padded to contain the full original swath width, with pixels
falling outside the extraction box being set to arbitrary meaningless
values depending on the band.

The new L1A and L1B files will contain in their HDF headers the
following non-standard fields:

   Extract Pixel Offset
   Extract Pixel Count
   Extract Line Offset
   Extract Line Count

L1B subscene files can then be processed to Level 2 Ocean data using the
SeaDAS msl12 program. msl12 will detect the original subscene box and
only process data contained within this box. If your Level 2 processor
is not msl12, it may be able to process the L1B padded subscence as is,
or may require modification. (Also note that the SeaDAS software package
is capable of displaying and navigating L1A, L1B, L2, and L3 subscenes.)

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AFFECTED FILES:
===============

bin/aqua_l1bgen, bin/terra_l1bgen:
  -changed the LOCALGRANULEID field so now only the filename and
   not the path is written

bin/MODl1extract:
  -new binary utility, called by the new L1A extractor script to perform
   the actual extraction

bin/MODll2snpx:
  -new binary utility, called by the new L1A extractor script to convert
   lat/lons to scan/pixel numbers

doc/README.modis_L1A_extract:
  -readme document for the new L1A extractor script

scripts/modis_L0_to_L1A_GEO.csh, scripts/modis_L1A_to_GEO.csh:
  -fixed bug for certain platforms that can't handle long command lines
  -fixed bug where in some situations the *.met files were not being
   removed after processing

scripts/modis_L1A_extract.csh:
  -new MODIS L1A subscene extraction script. The script is a wrapper for
   the new MODll2snpx and MODl1extract binaries. Given lat/lon corners
   of a geographic box, the script will extract data within the box and
   optionally create a new corresponding GEO file.

scripts/modis_L1A_to_L1B.csh:
  -added command line option to keep/delete the 1km/hkm/qkm L1B files
  -fixed bug for certain platforms that can't handle long command lines
  -fixed bug where in some situations the *.met files were not being
   removed after processing

scripts/modis_update_luts.csh:
  -prints more information regarding current and active LUTs

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New Aqua LUTs included:
=======================

data/modisa/cal/MYD02_Emissive_LUTs.V5.0.7.6d.hdf
data/modisa/cal/MYD02_QA_LUTs.V5.0.7.6d.hdf
data/modisa/cal/MYD02_Reflective_LUTs.V5.0.7.6d.hdf