Bernese GPS Software Version 5.0 - Bernese GNSS Software

20.4 Description of the Processing Examples
starting from broadcast clocks. The result file is a clock RINEX file including both station
and satellite clock corrections. A processing summary file CLKyyssss.PRC is written at the
end of the BPE.
Some important features of this BPE are:
• Observation files with significant gaps or unexpectedly big residuals are automatically
rejected.
• All clock solutions are computed with a zero-mean condition for all estimates of the
receiver clock corrections (GPSEST in PID 301, 302, and 401). The reference clock for
the final clock RINEX file is selected automatically (CCRNXC in PID 411).
• Coordinates with a flag I (IGS00) in the a priori coordinate file are constrained
when clock corrections are estimated together with the station positions (GPSEST
in PID 301). The following runs of GPSEST (PID 302 and 401) improve the remaining
station positions from the previous run because these coordinates are assumed to be
unknown.
If you already have well determined coordinates (e.g., from a double-difference solution
based on phase observations), you may also fix or constrain them when estimating
the clock corrections in GPSEST. This may be done by selecting all non-blank flags in
the a priori coordinate file (select WITH FLAG in panel “GPSEST 4.1: Datum Definition
for Station Coordinates” and # in the subsequent panel in the GPSEST.INP files of the
PIDs 301, 302, and 401).
Note when processing your own data: If you do not have precise coordinates, make
sure that you have at least two or three reference sites (flag I in the a priori coordinate
file) included in your processing.
20.4.4.1 Copy Required Files
Before any program is started, all necessary files must be copied to the respective campaign
directories. In addition the a priori coordinates must be prepared.
#
# Copy required files
# -------------------
001 CLK_COP CLK_GEN ANY 1
002 COOVEL CLK_GEN ANY 1 001
PID 001 CLK COP: This script copies all needed files into the respective campaign directories.
If appropriate, file names will be changed according to the BPE variable V B
(which holds the prefix for input files) and/or a session-specific date. The files dealt
with in this script are:
File type Source directory Destination directory Renaming
RINEX observation files ORX RAW no
IGS precise orbit file ORB ORB yes
IGS pole file ORB ORB yes
DCB files ORB ORB yes
Bernese GPS Software Version 5.0 Page 449