0 -   6 hour files: total    3 TRaP members.
/data/Petrap/2025/ALVIN/2025ALVIN.WTPZ21.KNHC.310800.RCLIPER.05310800.18.Z
/data/Petrap/2025/ALVIN/2025ALVIN.WTPZ21.KNHC.310836.AMSUM1.05310418.18.Z
/data/Petrap/2025/ALVIN/2025ALVIN.WTPZ21.KNHC.310836.GHEHR.05311000.12.Z
Grid information: nc,nr,clat,clon:      800     800   20.95  109.35
Total independent TRaPs used:   3
Total Ensemble TRaP members:   3