**------------------------------------------------------------**

  This directory contains tarfiles of the International MODIS
  and AIRS Processing Package (IMAPP) Products.  The software is 
  supported on the following platforms: 

   (1) SGI, IRIX64 6.5

   (2) SUN, SunOS 5.7, sun4u sparc SUNW,Ultra-5_10

   (3) IBM, AIX 4.3

   (4) LINUX, 2.4.7-10smp, compiled with g77/gcc.

  Note: This release consists of the MODIS aerosol software, along
        with an updated FLATFILE.tar and ANCILLARY.tar set of files.
        Only 6 Science Data Sets are included in the aerosol
        output file:
               Latitude
               Longitude
               Optical_Depth_Land_And_Ocean - AOT at 0.55 micron
                       for both ocean (best) and land (corrected)
               Optical_Depth_Ratio_Small_Land_And_Ocean - Ratio of
                       small mode optical depth at 0.55 micron
               Corrected_Optical_Depth_Land  (3 bands) - Corrected
                       optical thickness at 0.47, 0.55, and 0.66 micron
               Effective_Optical_Depth_Average_Ocean (7 bands) -
                       AOT at seven bands for average solution at
                       .47, .55, .66, .86, 1.2, 1.6 and 2.1 micron

        You will also need the cloudmask CLOUDMASK.tar and destriping
        DESTRIPE_BAND26.tar software to run this algorithm if you
        have not already installed them.

**------------------  download directory  ---------------------**

  AEROSOL.tar: MODIS aerosol retrieval source code with
               build and run instructions

               Note: cloudmask, ancillary and flatfile must be built
                     prior to aserosol and all three should
                     be built off of the same core directory,
                     for example /MODIS/aerosol, /MODIS/ancillary,
                     /MODIS/flatfile, /MODIS/cloudmask,
                     /MODIS/destripe_band26.
                     There is a modis_aerosol.csh script
                     in the aerosol/src directory which
                     will run the five processes together
                     on the test data sets included in the
                     tar files.

  FLATFILE.tar:  Flatfile source code with build and run instructions.
                 This code extracts radiances and reflectances from
                 input L1B DAAC production or L1B IMAPP hdf files.
                 This set of software now includes a L1B 500m file extractor.

  ANCILLARY.tar:  Ancillary extraction source code with build and run
                  instructions.  This version includes a script to 
                  extract a binary file from the input global TOVS
                  total ozone NCEP grib file.

  Documentation :

    REFERENCES.doc: List of aerosol algorithm technical references.

    Aerosol_Output_Description.txt: A description of the aerosol
                   output file product.


  IDL routines:
    IDL Source code used to create aerosol product MOD04 hdf files
       create_fake_mod04.pro
       hdf_sd_varread.pro

-----------------------------------------------------------------------------

INPUTS:  Found in the input_data directory
------------------------------------------
    Test input Terra (t1 prefix) HDF radiance files  (Total file size 1.3 GB)
       t1.04183.1510.1000m.destripe.hdf.gz (destriped 1 km L1B file)
       t1.04183.1510.1000m.hdf.gz
       t1.04183.1510.250m.hdf.gz
       t1.04183.1510.500m.hdf.gz
       t1.04183.1510.geo.hdf.gz

   Test ancillary data input files
       040701.grb.gz                    (TOVS ozone grib file)
       NISE_SSMIF13_20040701.HDFEOS.gz  (snow/ice extent hdf file)
       eng.040701.gz                    (sea ice contration grib file)
       gdas1.PGrbF00.040701.18z.gz      (global model grib file)
 
OUTPUTS:  Found in the output_data directory (The Terra complete
          data set below is around 1.1 GB of data)
------------------------------------------
  Test Output Files:

    Test aerosol result files for comparison with output aerosol data files.

    Test output binary files:
       040701.grb.bin.gz
       NISE_SSMIF13_20040701.HDFEOS_NORTH.bin.gz
       NISE_SSMIF13_20040701.HDFEOS_SOUTH.bin.gz
       eng.040701.bin.gz
       gdas1.PGrbF00.040701.18z.bin.gz

    Test output L1b and cloud mask binary image and header files:
       t1.04183.1510.1000m.img.gz         t1.04183.1510.1000m.hdr
       t1.04183.1510.500m.img.gz          t1.04183.1510.500m.hdr
       t1.04183.1510.250m.img.gz          t1.04183.1510.250m.hdr
       t1.04183.1510.geo.img.gz           t1.04183.1510.geo.hdr
       t1.04183.1510.met.img.gz           t1.04183.1510.met.hdr
       t1.04183.1510.mod35.img.gz         t1.04183.1510.mod35.hdr
       t1.04183.1510.mod35qa.img.gz       t1.04183.1510.mod35qa.hdr
       t1.04183.1510.mod35debug.txt


    Test output aerosol binary, header, config. file and debug output:
       t1.04183.1510.mod04.cfg            t1.04183.1510.mod04debug.txt
       t1.04183.1510.mod04.img.gz         t1.04183.1510.mod04.hdr

    Test output aerosol hdf file: 
       t1.04183.1510.mod04.hdf.gz