Convertion of MOPITT CO data from HDF to NetCDF and final to a boundary file
Processing and deliveries of MOPITT Version 4 ('V4') Level 1, 2, and 3 products will cease at the end of 2012. The MOPITT V4 product is based solely on thermal infrared (TIR) radiances, and is therefore similar to the newer Version 5 TIR-only product.
A small systematic error in the MOPITT geolocation values (latitude and longitude) has been identified. A detailed report analyzing this effect and describing a correction method is available. This issue affects both current (V4 and V5) and previous (V3) MOPITT operational products. In MOPITT daytime (descending) overpasses, reported longitudes (contained in the Level 1 and Level 2 data files) appear to be systematically biased by approximately 0.35 degrees to the west of MOPITT's actual field of view. Reported latitudes in daytime overpasses do not appear to be significantly biased. The longitudinal error is similar to the size of a single MOPITT field of view (~22 km). Longitudinal errors increase at high latitudes where lines of longitude converge. Geolocation errors for nighttime (ascending) overpasses are different than errors for daytime overpasses.
Information
http://www.acd.ucar.edu/mopitt
http://eosweb.larc.nasa.gov/PRODOCS/mopitt/table_mopitt.html
http://www.acd.ucar.edu/mopitt/news.shtml
Conversion Routines
The needed IDL scripts and FORTRAN programs are under control of the CVS (Concurrent Version System) utility. To get the code the environment variable CVSROOT must be set to /usr/nfs/lsoftware/icg1/archive. The command
cvs co -P mopittv4
creates a directory mopittv4 in the current working directory and copies the current version of the package to this directory.
Documentation
The directory mopittv4 contains a folder doc, where the usage is documented. The documentation can also be found here.
Boundary Files
The created boundary files are stored in the directory:
/usr/nfs/data/clams/icg112/mopitt/boundfiles