News and Updates

2016/04/15 - Release of GAPS v6.0.0
  • GAPS re-branded as GNSS Analysis and Positioning Software
  • Added the capability to process both Galileo and BeiDou observables
    • User-selection of GPS, Galileo, and/or BeiDou processing options
    • User-selection of IGS MGEX orbit and clock products for Galileo/BeiDou integration
  • Added calculation of orthometric height based on use of EGM2008
  • User-selection of available coordinate reference frame transformations
2015/09/01 - Release of GAPS v5.9.1
  • GAPS "Basic" and "Advanced" user submission pages.
  • GAPS "Basic" user submission page allows for quick and easy submission of observation files for users who frequently use GAPS' default processing options.
  • GAPS "Advanced" user submission page includes:
    • User-selection of the orbit and clock products to be used.
    • User-selection of the carrier-phase and pseudorange observables to be used.
    • Optional use of GPS L2C in place of P2 for all satellites currently transmitting L2C.
    • Optional use of GPS L5 in place of L2 for all satellites currently transmitting L5.
    • Optional use of static-mode satellite clock interpolation (if 30s clock product is used and logging rate < 30s).
    • User-selection of GDOP cutoff threshold.
    • User-selection of positional convergence condition and maximum number of iterations for least-squares filter.
    • User-selection of all available NAD prediction model and mapping function combinations.
    • Optional use of GPT2.1w and ESA 2.5 NAD prediction models.
    • User option to not estimate NAD.
    • User option to not estimate tropospheric gradients.
    • Optional use of a user-provided receiver antenna calibration.
  • NAD estimation automatically terminated if receiver rises above tropospheric threshold (50,000 ft).
  • Added option to estimate integrated water vapor (if a meteorological file is submitted).
  • Enhanced the cycle-slip detection algorithm (following Blewitt, 1990).
  • A minimum of 4 satellites per epoch are required before estimation begins.
  • New .ion, .nad, .cmp, and .DOP output files as well as modified formatting of the .par file.
  • Improved reporting of processing parameter options and results in the HTML output.
  • Added receiver clock and DOP plots.

2015/03/01 - Release of GAPS v5.5.0
  • Compressed files accepted: 7z,  BZIP2, GZIP, TAR, ZIP, CAB, ISO, MSI, RAR, and Z.
  • Added support for RINEX 3.
  • Raw receiver files accepted: Trimble DAT and RT17; Ashtech R, U, B-, E-, S-, and D-; Leica LB2, MDB, and DS; Topcon/Javad JPS; Septentrio SBF; Navcom; Conanbinary; TurboBinary; u-blox UBX; Canadian Marconi Binary;  Rockwell Zodiac Binary; Motorola Oncore; ARGO; and Texas Instruments 4100 GESAR, BEPP/CORE, and TI-ROM.
  • KML (Keyhole Markup Language) file in the output.
  • Minor bug fixes (header alignment, submit page text,...).
  • Periodical check of IGS ANTEX files for updated versions.
  • Code optimization and cleaning.
  • Quality check of every submitted file.
  • NRCan (Natural Resources Canada) precise products (final and rapid) added for triple redundancy.
  • 30-second precise clock files now the default for static and kinematic processing.

2013/02/01 - Release of GAPS v5.2.0

2011/09/10 - Release of GAPS v5.0

  • Ocean Tide corrections has been include to GAPS corrections.
  • Earth Tide corrections has been include to GAPS corrections.

2010/06/28 - Release of GAPS v4.1.2

  • Source of precise products has been changed to the Crustal Dynamics Data Information System. IGS ftp now used as backup.
  • GAPS can now process RINEX files with a latency of ~17 hours. Due to orbit arcs in the past the latency was ~34 hours.

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