Bernese GPS Software Version 5.0 - Bernese GNSS Software

9. Combination of Solutions
The point code is incremented from A to B or C for station specific parameters related to
stations with the same 4-character abbreviation but different DOMES code. If 4-character
abbreviation and DOMES code are equal the solution ID is incremented.
Option “Truncate all NEQ station names after position 14” in panel “ADDNEQ2 3.3: Options 3”
(see Figure 9.11) allows it to disregard characters in the station names after position 14 in
order to eliminate characters B, C, etc., following the DOMES code and indicating different
coordinate solutions. Instead of NO and YES a number may be specified giving the position
after which the station names shall be truncated. Truncated station names are used for all
output files, not only for SINEX.
The a priori constraint matrix in the SINEX file (“SOLUTION/MATRIX APRIORI” block) needs
to be regular. This is not the case if the datum is defined using a free network constraint
or if not all stations are constrained. If YES is selected for option “Regularize a priori constraint
matrix” (Figure 9.11), an additional weight of 1e-7 is put to the diagonal of the matrix (as
well as to the solution matrix). Alternatively you may specify another value as regularization
constraint in the same field.
Option “Include ADDNEQ1-style statistics block” allows to include a comment block containing
statistical information in the SINEX output file as it was generated by the old ADDNEQ
program and is available only for backwards compatibility.
9.4.9.2 Import of SINEX Files
The program SNX2NQ0 (”Menu>Conversion>SINEX to normal equations”) allows it to convert a list
of SINEX files to binary normal equation files. The program supports SINEX versions 0.05
to 2.00. See also Section 4.6. The program inverts the (constrained) correlation or covariance
matrix (block “SOLUTION/MATRIX ESTIMATE”) as well as the constraint matrix (block
“SOLUTION/MATRIX APRIORI”) before subtracting the second from the first matrix to obtain
the unconstrained normal equation matrix.
Alternatively the program may read normal equations directly from SINEX if the corresponding
block “SOLUTION/NORMAL EQUATION MATRIX” is available. In option “SOLUTION
block for generating normal equation system” in panel “SNX2NQ0 2: Options” the requested SINEX
source block can be selected.
Option “Reconstruct original NEQ info from Bernese SINEX data” makes it possible to reconstruct
the original normal equation information from SINEX files written by the Bernese GPS
Software. The “SOLUTION/STATISTICS” block is used for Bernese SINEX files written by
the program ADDNEQ2, and the SINEX header information is used for Bernese SINEX files
written by the old program version ADDNEQ. If the SINEX files are not Bernese SINEX
files the statistical information might be not extracted correctly.
The unit weight specified in option “A priori sigma of unit weight” usually corresponds to the
weight of the zero-difference L1 phase observable (at zenith). If you reconstruct the original
normal equation information from Bernese SINEX files, this a priori sigma is not used but
extracted from the SINEX data.
With option “Generate CRD and VEL” in panel “SNX2NQ0 2: Options” enabled station coordinates
and (if available) velocities are extracted from the SINEX “SOLUTION/ESTIMATE”
block and written to file in Bernese format. For each input SINEX file a Bernese coordinate
and velocity file is written with the same name but different extension.
Page 206 AIUB