Bernese GPS Software Version 5.0 - Bernese GNSS Software

3. Campaign Setup
In this section we give an overview on some important station files which are necessary
for processing your campaign. Some of them are needed to run a precise point positioning
(PPP) similar to the example described in Section 20.4.1 to complete the list of a priori
coordinates and velocities.
3.4.1 Create Reference Coordinate/Velocity File
If you are going to process your regional/local campaign and you do not have accurate
(decimeter-level) coordinates of any of your stations in the ITRF, we recommend to include
at least one IGS site (near to the area of your campaign) into the processing. For more
details on the realization of the geodetic datum we refer to Chapter 10.
At this point you have to create a coordinate and a velocity file (see Sections 22.8.5
and 22.8.7 for a file description) for the reference sites of your network. In the case of ITRF
(currently ITRF 2000, from ftp://lareg.ensg.ign.fr/pub/itrf/itrf2000) or preferable
IGS-reference frame (currently IGS 00b) you can start with the corresponding SINEX
file. The program SNX2NQ0 (”Menu>Conversion>SINEX to normal equations”, see Section 4.6.2 for
a program description) extracts the information from SINEX-files into Bernese coordinate
resp. velocity files (apart from writing a normal equation file). The input SINEX file has to
be copied into the SOL-directory of the campaign.
The coordinate and velocity files for the reference sites of the IGS00 realization are available
at http://www.aiub.unibe.ch/download/BSWUSER50/STA (filenames: IGS 00 R.CRD and
IGS 00 R.VEL). These files are already in the Bernese coordinate resp. velocity file format
and can be copied directly into the STA-directory of the campaign.
Using the ”Menu>Campaign>Edit station files>Station coordinates” resp. ”Menu>Campaign>Edit station files
>Station velocities” the Bernese coordinate and velocity files can be edited in an input mask.
Use this menu item to check and adapt the downloaded files or to create the files manually.
It is recommended that these files contain only the reference sites or stations with very
accurate (one centimeter level) a priori coordinates and velocities. The remaining stations
will be added by a PPP procedure described below.
The eccentricity files providing local tie information for the processing are still available in
Version 5.0 of Bernese GPS Software. Use this file with care and only in the cases where it
is indispensable. Local ties will be handled in ADDNEQ2 in future versions of the Bernese
GPS Software.
3.4.2 Create Station Information File
Two sections of the station information file (description in Section 22.8) are important at
this point:
TYPE 001: RENAMING OF STATIONS to get the correct station names for the processing
and
TYPE 002: STATION INFORMATION to make sure that the correct receiver resp. antenna
types and antenna heights are used in the processing.
Page 48 AIUB