12 -  18 hour files: total    5 TRaP members.
/data/Petrap/2015/ULA/2015ULA.WTPS31.PGTW.312100.AMSUM2.12312018.18.Z
/data/Petrap/2015/ULA/2015ULA.WTPS31.PGTW.312100.AMSUNN.12311644.18.Z
/data/Petrap/2015/ULA/2015ULA.WTPS31.PGTW.312100.GHEHR.12312200.12.Z
/data/Petrap/2015/ULA/2015ULA.WTPS31.PGTW.312100.SSMISB.12311730.18.Z
/data/Petrap/2015/ULA/2015ULA.WTPS31.PGTW.312100.SSMISD.12311719.18.Z
Grid information: nc,nr,clat,clon:      800     800  -18.10  173.35
Total independent TRaPs used:   5
Total Ensemble TRaP members:   5