Breadcrumbs

GNSS Post processing Tools

  • GNSS Post processing has tools to manage:

    image-20250108-164717.png

    • The coordinate system of the project.

    • The antenna calibration sets.

    • The precise ephemeris.

Coordinate system

Antenna manager

  • Antenna manager allows to manage the phase center calibration from different agencies.

  • Click Antenna manager.

    image-20250109-084932.png

  • This command opens a new window.

    image-20250109-085016.png

  • The table shows the available calibration for GNSS antennas from different brands.

It is usually not necessary to perform any operation on this database, since all calibrations are preloaded.

  • In the table there are information on the calibration file.

    • IGS name: the IGS name of the antenna point.

    • Calibration data: the date of the calibration for selected antenna from a specific agency.

    • GPS/GLONASS/Galileo/Beidou/QZSS/SBAS: shows if calibration is specific for a constellation.

    • Calibration set: the agency for the calibration.

  • Click Group antennas image-20250109-085245.png to group the antennas by calibration agency.

    image-20250109-085305.png

  • On the bottom bar there are some commands to manage the calibrations:

    • Import ATX image-20250109-085724.png : allows to import ATX files. These files are available from various agencies including the International GNSS Service (IGS) or National Geodetic Survey (NGS) and have a list of antenna types by manufacturer with their respective offsets and eccentricities.

    • Add image-20250109-085738.png : to manually create an antenna entering the phase center offsets and the antenna name.

    • Delete image-20250109-085752.png : to delete an antenna calibration.

    • Copy to project image-20250109-085809.png : to copy selected antenna models to the current project, within the Antennas page.

Precise ephemeris

The Precise ephemeris command allows to import and use precise ephemeris in SP3-P format to be used in the GNSS processing. The SP3-P format is an internationally accepted standard ASCII format for precise ephemeris.

There are several services that provide precise ephemeris data, like for example:

  • IGN Global Data Center.

  • IGS International GPS Service for Geodynamics.


  • Click Precise ephemeris.

    image-20250109-091129.png

  • This command opens a new window.

    image-20250109-090904.png

  • The table shows the list of available precise ephemeris that was previously imported.

    • Import: to import a file in SP3-P format.

    • Delete: to delete imported file.