12 -  18 hour files: total    3 TRaP members.
/data/Petrap/2025/31P/202531P.WTPS31.PGTW.202100.GHEHR.04202200.12.Z
/data/Petrap/2025/31P/202531P.WTPS31.PGTW.202100.RAIN.04201612.18.Z
/data/Petrap/2025/31P/202531P.WTPS31.PGTW.202100.RRH_AMSR.04201614.18.Z
Grid information: nc,nr,clat,clon:      800     800  -12.05 -137.85
Total independent TRaPs used:   3
Total Ensemble TRaP members:   3