12 -  18 hour files: total    2 TRaP members.
/data/Petrap/2025/31P/202531P.WTPS31.PGTW.190300.AMSUM1.04182332.18.Z
/data/Petrap/2025/31P/202531P.WTPS31.PGTW.190300.GHEHR.04190400.12.Z
Grid information: nc,nr,clat,clon:      800     800  -12.60 -141.25
Total independent TRaPs used:   2
Total Ensemble TRaP members:   2