Bernese GPS Software Version 5.0 - Bernese GNSS Software

10. Station Coordinates and Velocities
2cm/Jahr
Figure 10.4: Velocity field obtained from the weekly coordinates solutions at CODE within
the years 2002 to 2006.
For short time intervals, e.g., half a year, it may make sense to estimate only the horizontal
velocity components. This can be achieved by defining the geodetic datum with a station
sigma file. The file should contain North, East, and Up constraints for the reference sites
just as usual but in addition very tight Up constraints for all additional stations.
Program ADDNEQ2 allows to save site velocities in normal equations and manipulate and
combine velocities from input normal equations.
Figure 10.4 shows the velocity field obtained from the weekly coordinates solutions at CODE
within the years 2002 to 2006.
10.3.5 Use of the Station Information File
The station information file (see Section 22.8.3) plays a central role for the coordinate
estimation with ADDNEQ2. The most important applications of this file are (see also Section
9.4.6):
• Change station names:
Station names can be changed based on the first section of the file (TYPE 001). In this
way, station names from different normal equation files can be unified or a new set
of coordinates can be set up, e.g., after an equipment change (see Section 10.3.3) or
a displacement of the antenna. Note that ADDNEQ2, contrary to RXOBV3, does not
support wildcards in station names.
The stations are renamed immediately after reading the normal equation file. Consequently,
the new name must be used for all consecutive manipulations (e.g., for datum
definition or in the other sections of the station information file).
Page 224 AIUB