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Name Template: PUB/MISSION/level1b/gpsPor/YYYY.DDD/gpsPor_YYYY.DDD.HH.MM.UUUU.PP_SSSS.VVVV_sp3

DDDDay of year
LLLLEO id (1-999)
MISSIONMission ID (eight characters or less--champ, champrt, sacc, sacctst, etc)
NNdump number (1-99)
PPduration of orbit prediction (days)
PUBBase directory for the pub hierarchy
UUUUduration (minutes)

Predicted GPS orbit specification file. Contains predicted GPS orbits two weeks ahead.