Appendix C. GPS data processing when SA is on - PrideLab/PRIDE-PPPAR GitHub Wiki

GPS data when SA is on have low-precision broadcast ephemeris, so the usage of broadcast ephemeris in these periods should be cautious. To process these GPS data for users easily, we have set some configurations in “tedit” module to avoid obtaining satellite clock corrections from broadcast ephemeris. Besides, users should change the “Strict editing” mode from “YES” to “NO” in configuration file. And change the products name in the configuration file.

As an example, we select precise satellite clock/orbit/ERP repro2 products of JPL to process GPS data when SA is on. We test an IGS station (ALBH) in 1995. The figure listed below (Figure C-1) records the position time series in east/north/up directions, respectively. The X axis, which denotes day of year, ranges from 1 to 365. The Y axis denotes changes of positions.

Figure C-1 Position time series at station ALBH in 1995