The Giovanni-3 Altitude Pressure Conversion operation takes a series of swath HDF4 files and Global Data Assimiliation System (GDAS) ancillary (pressure isobar) HDF-EOS files as input, and creates a corresponding series of HDF4 output swaths. The swaths may vary in the number of scan lines, and the bin elements may vary in size.
The output swaths contain a supplemental Scientific Data Set (SDS) called 'GeoHPressure' which is evaluated via application of a selectable algorithm (simple interpolation or barometric interpolation).
While scan line and bin dimensions are provided by the input HDF, the algorithm selection must be specified in the Giovanni-3 workflow XML. The algorithm makes use of the input swath 'Altitude' SDS and the input GDAS ancillary pressure isobar, geopotential height, and temperature SDSs to generate the new 'GeoHPressure' SDS.
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