6 -  12 hour files: total    2 TRaP members.
/data/Petrap/2025/31P/202531P.WTXS31.PGTW.221500.AMSUM1.04221243.18.Z
/data/Petrap/2025/31P/202531P.WTXS31.PGTW.221500.GHEHR.04221400.18.Z
Grid information: nc,nr,clat,clon:      800     800   -9.40 -132.20
Total independent TRaPs used:   2
Total Ensemble TRaP members:   2