Bernese GPS Software Version 5.0 - Bernese GNSS Software

10. Station Coordinates and Velocities
fore, epoch-wise pre-elimination and resubstitution of epoch parameters (description see Section
7.5.6) is preferable for most applications. It is enabled when the option “Pre-Elimination”
in panel “GPSEST 5.1” is set to EVERY EPOCH for kinematic coordinates.
The way formal errors of kinematic coordinates and normalized residuals are computed in
the case of epoch-wise pre-elimination and resubstitution depends on the setting for option
“Var-covar wrt epoch parameters” in panel “GPSEST 3.2: General Options 2”. If the option is set to
SIMPLIFIED formal errors are computed based on the epoch solution only, with the non-epoch
parameters introduced without error. With the option set to CORRECT the formal error is
computed correctly but the processing time and memory consumption may become very
large. For option SIMPLIFIED it is then preferable to scale normalized residuals with the a
priori variance (NORM APRIORI instead of NORMALIZED in option “Type of computed residuals”
in panel “GPSEST 3.1: General Options 1”). We refer to Section 7.5.6 for more information.
10.4.3 Program Output and Result File
The results of the kinematic coordinate estimation are included in the GPSEST program
output. An example is given in the left hand panel of Figure 10.6. The first line gives the
a priori coordinates for the station (degrees, minutes, and seconds of arc for latitude and
longitude, meters for height) as it is given in the input static coordinate file. For each epoch
one line is printed containing the following information:
EPO : Epoch number.
EPOCH (MJD): Epoch of the kinematic position in modified Julian date.
#OBS: Number of observations that contributed to the epoch parameter (observations
from different baselines are counted separately).
STA : First four characters of the station name.
CORRECTION AND RMS IN METER:
Estimated correction and formal error in north, east, and up components in meters.
The corrections refer to the a priori coordinates used.
ESTIMATED POSITION WRT. FIXED COORD.:
Estimated trajectory in north, east, and up components in meters. The columns
contain the difference between the position estimated for the particular epoch and
the constant coordinate from the coordinate input file.
The output for different kinematic stations is separated by a blank line.
A minimum number of observations contributing to the kinematic position of an epoch can
be defined in panel “GPSEST 6.5: Kinematic Coordinates”. If less observations are available the
corresponding value is labeled with the flag S instead of flag K in the kinematic result file
and is marked in the program output by an asterisk in the column containing the number
of observations.
The program output section looks slightly different for LEOs (see the right hand example
in Figure 10.6). In that case only the estimated corrections in the X,Y,Z-components in the
Earth-fixed system are printed together with their formal error.
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