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Name Template: PUB/MISSION/level1a/fidGps/YYYY.DDD/fidGps_FFFF.YYYY.DDD.HH.MM.UUUU_bnx

DDDDay of year
FFFFFiducial site ID
HHHour
MISSIONMission ID (eight characters or less--champ, champrt, sacc, sacctst, etc)
MMMinute
PUBBase directory for the pub hierarchy
UUUUDuration of file in minutes
YYYYYear

Fiducial (ground GPS) in BINEX record 7f format (see http://binex.unavco.org/binex_record_7f.html.) Each file contains a variable duration of data. Fifteen minutes is currently planned for all COSMIC data. One hour is the size of files for GPS/MET.