Ephemeris
Determining the correct Ephemeris File to Download from IGS
How to determine the correct Ephemeris File to download from IGS: First look at the OPUS report from the GPS unit. Find the highlighted info in Figure 1: Figure 1 Go to the IGS website: ftp://ftp.igs.org/pub/. Click on the GPS or GLONASS link as shown in Figure 2: Figure 2 For this example, I chose…