Introduction


Version 5.0 of the Bernese GPS Software was released in May 2004. Meanwhile, a lot of model updates, processing improvements, and other developments were brought to our currently running version of the Bernese GNSS Software.


Even if we have numerous development projects for the software (see, e.g., Meindl et al., 2006 or Dach et al., 2008) still not closed, we thought that it was time to share the current status of the software development with you:


We decided to derive from our currently running version the new version 5.2 for the user community.


The following presentation by Dach and the Bernese GNSS Software development team, 2010 is the official announcement of this new version.


New name


In order to indicate the extension of the processing capabilities of the software to GNSS other than just GPS, we decided to replace "GPS" by "GNSS" in the name. Starting with version 5.2 the software will be named


Bernese GNSS Software.


New features


The list below is not exhaustive, it contains only a selection of the most important improvements of version 5.2 with respect to version 5.0. Numerous improvements have already been published as patches for version 5.0. Only additional improvements are listed below:


New processing capabilities:

  • FODITS: Find Outliers and Discontinuities in Time Series
    A new program of Bernese GNSS Software (see PhD thesis Ostini, 2012)
  • GLONASS ambiguity resolution
  • GLONASS clock estimation (including PPP)
  • GNSS-specific receiver antenna corrections
  • 1/4-cycle shift for L2C is considered in ambiguity resolution
  • improved support for satellite-wise antenna offset/pattern estimation
  • flexible multi-year GNSS-satellite antenna offset/pattern estimation
  • update a priori values for satellite antenna parameters in ADDNEQ2
  • receiver antenna parameters are supported in ADDNEQ2 (also GNSS-specific)
  • support of individually calibrated receiver antennas including the corresponding check of the RINEX header information
  • optional exclusion in RXOBV3 and ADDNEQ2 of stations due to equipment changes
  • improved philosophy for station and observation exclusions in ADDNEQ2 and RXOBV3
  • stochastic pulses may be estimated when fitting orbits in ORBGEN
  • accelerations due to solid Earth tides are considered for orbit integration in ORBGEN
  • arc spilt definition with system dependent limit definitions
  • flexible observation sampling, in particular for epoch parameters in GPSEST
  • clock RINEX files may be introduced in GPSEST as a priori (receiver) clock
  • interpolation of the a priori clock from given input file values
  • improved constraining of zero- and single-difference reference ambiguities
  • acceleration parameters for LEO orbit determination
  • automated adaption of pre-processing options in MAUPRP according to the baseline length
  • detect "cycle slips" at every epoch during a certain interval
  • handle receiver clock events in RNXSMT
  • solve for Helmert-parameters when combining solutions in ADDNEQ2
  • improved SINEX import capabilities
  • possibility to exclude specific receiver types when selecting baselines
  • dual frequency use for Galileo, SBAS, Compass, and QZSS is prepared (not yet fully tested for all systems because of lack of data)

Observation and processing models:

  • troposphere: GMF/GPT and VMF1
    Mendes-Pavlis for SLR
  • ionosphere: higher order terms (2nd and 3rd order and ray bending) including scaling factors
  • geophysical deformation models can be introduced as grids and validated by estimating scaling factors
  • mean pole handling according to IERS2010 standards
  • interpolation of ocean tidal loading to 342 constituents (HARDISP) according to IERS2010 conventions
  • S1/S2 tidal corrections
  • center of mass corrections for ocean and atmospheric tidal loading
  • DE405 ephemeris series for planets in ORBGEN

Improvements in output/results files:

  • print the full station name in the repeatability section of ADDNEQ2
  • report intervals with connected phase measurements for each GNSS in GPSEST
  • extraction for clock estimation results and Allan deviation in GPSXTR
  • PLT-file for coordinate repeatability with covariance information in space from ADDNEQ2
  • report repeatability for all parameter types in a separate result file in ADDNEQ2
  • list pre-eliminated parameters due to station problems
  • more digits for station coordinate related program output and result files
  • detect the first epoch with an outlier problem in CODXTR, helpful for detection of the epoch for a repositioning event

Technical improvements:

  • use Makefile to compile the Fortran source code
  • executables and libraries from different compilers may be hold in parallel
  • dynamic memory allocation for the most important variables in GPSEST
  • reduced memory consumption and speed up parameter pre-elimination in ADDNEQ2
  • option to compute no solution in GPSEST and ADDNEQ2, to only generate a resulting NQ0 file
  • break the limitation of a scratch file in GPSEST for high-rate data by splitting the file
  • increase formats in different output files to consider more measurements, satellites, and systems
  • CPU consumption statistics for each program run and for the BPE
  • all variables are explicitly defined (no IMPLICIT NONE statements anymore)
  • all routines are defined as modules for a strict check of the parameter lists

Menu/BPE related improvements:

  • now based on QT4
  • memory optimized reporting of BPE status
  • reprocessing mode: automatically create campaigns for each session in case of a multi-session BPE
  • flexible suspension of PCFs to optimize the usage of computer resources
  • continue the BPE in case of an error in specifically indicated scripts
  • accept a certain number of erroneous sessions in case of a multi-session BPE
  • force to keep menu variables when storing the input file (e.g., when changing general options)
  • show UNIX process IDs for BPE server and clients
  • show defined PARAM1..PARAM9 with their values in BPE client protocol file
  • reconnect BPE client if the TCP/IP connection to the server was lost
  • "remote mode" for slow data connections


Updates of the processing examples


From the feedback from the users we have seen that the BPE processing examples were highly appreciated. Therefore, we decided to enhance the set of example BPEs by adding examples for LEO-processing and SLR-analysis. We also brought the following improvements for the example BPEs:

  • update the existing three examples to the latest models
  • add more ambiguity resolution strategies
  • prepare for a bigger number of stations
  • default combined GPS/GLONASS processing
  • include an hourly processing scheme
  • allow for a re-processing scheme


File format changes


New file types:

  • grid files for VMF1 and geophysical models
  • atmospheric tidal loading corrections (extracted from a grid by a program)
  • solid Earth tide model for ORBGEN (as done for ocean tides in Version 5.0)
  • event list file, Earthquake file (used by FODITS)
  • SLR corrections

Files with new formats, converter needed:

  • station information/problem file (conversion program STA2STA)
  • antenna phase center correction file (ATX2PCV generates the new format)
  • satellite information file (download the new version)

File with new formats, old format still readable:

  • normal equation (NQ0)
  • standard orbit (STD,RPR)
  • coordinate/velocity files (CRD,VEL) with more digits
  • observation files (PZH,CZH,PSH,CSH,and RZH for SLR)
  • DCB-file may contain new types

File types not supported anymore:

  • file formats prior version 5.0: NEQ, STN, HTR, TRN, etc.
  • ELE-file from version 5.0 cannot be integrated with version 5.2


Updating


New: single and dual workstation license upgrades will not only be available for windows but also for UNIX/LINUX systems.


Please use the "forms to upgrade your version to the current version of the software" at the Order page to order the update to version 5.2. Choose the form either for research or commercial users.


All users who have purchased a new license of version 5.0 or ordered an upgrade to version 5.0 after November 1st, 2010 will get the update to version 5.2 for free.


If you have any questions concerning the update or the new version in general, please send an email to the Bernese Support.