Name Template: PUB/MISSION/level1b/gpsClk/gpsClk_YYYY.DDD.HH.MM.UUUU_SSSS.VVVV_clk
| 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 |
| SSSS | Subtype (an ID which tells the command options used in generating this file) |
| UUUU | Duration of file in minutes |
| VVVV | Version (an ID which tells the version of all codes using in generating thie file) |
| YYYY | Year |
GPS clocks extracted from IGS GPS orbits. Contains GPS clock offset information in Berne CLK format.
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