Name Template: PUB/MISSION/level1a/igsPol/igsPol_YYYY.DDD.HH.MM.UUUU_igs
| DDD | Day of year |
| HH | Hour |
| MISSION | Mission ID (eight characters or less--champ, champrt, sacc, sacctst, etc) |
| MM | Minute |
| PUB | Base directory for the pub hierarchy |
| UUUU | Duration of file in minutes |
| YYYY | Year |
GPS pole file from the IGS in IGS format. These files are matched with
the IGS GPS orbit files. These files are available from the IGS.
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