This function returns information about a subsetted time period for a particular field. Because of differences in number type and geolocation mapping, a given time period will give different values for the dimensions and size for various fields.
Result = EOS_SW_PERIODINFO(swathID, periodID, fieldname, ntype, rank, dims, size)
Returns SUCCEED (0) if successful and FAIL (-1) otherwise.
Swath id (long) returned by EOS_SW_CREATE or EOS_SW_ATTACH.
Period id (long) returned by EOS_SW_DEFTIMEPERIOD.
Field to subset (string).
A named variable that will contain the number type of field (long).
A named variable that will contain the rank of field (long).
A named variable that will contain the dimensions of subset period (long).
A named variable that will contain the size in bytes of subset period (long).
In this example, we retrieve information about the time period defined in EOS_SW_DEFTIMEPERIOD for the Spectra field:
; Get size in bytes of time period for "Spectra" field status = EOS_SW_PERIODINFO(EOS_SW_id, periodID, $ "Spectra", ntype, rank, dims, size)