Bernese GNSS Software Version 5.2 Tutorial

7 Additional ExamplesIn the previous terminal sessions you have estimated coordinates, velocities, andtroposphere parameters. This is the standard application of the Bernese GNSSSoftware for most users.If you have finished this work or if you want to follow more examples at home,this document provides some suggestions to practice:• generation of a combined GPS/GLONASS orbit from IGS,• kinematic positioning for a station,• zero difference processing to estimate clocks, and• simulation of GNSS observations.7.1 Preparing Combined GPS and GLONASS IGS–OrbitsIn this section the differences to the standard procedure using CODE products containingGPS and GLONASS orbits with respect to IGS products are demonstrated. TheIGS uses independent combination procedures for GPS and GLONASS orbits resulting intwo sets of precise orbit files. That’s why the orbits for the two GNSS first need to bemerged.On the opposite, CODE (and other AC) uses a rigorous combined multi–GNSS processingscheme, hence producing a single precise orbit file.7.1.1 Prepare Pole InformationFor the IGS precise orbit files (PRE) the consistent EOP need to be available in the ORBdirectory (which is the case in the Bernese Introductory Course environment). As forthe use of CODE products in Sect. 3.1, the EOP information has to be converted fromthe IERS/IGS standard format (file extension within the Bernese GNSS Software is IEP)to the internal Bernese EOP format (file extension within the Bernese GNSS Software isERP) This is the task of the program POLUPD ("Menu>Orbits/EOP>Handle EOP files>Convert IERSto Bernese Format"). Simply specify IGS–related filenames — other settings are analogue toSect. 3.1 .Page 101