Modernized CSRS-PPP Service

In order to fully support multi-GNSS data, generate ambiguity resolved PPP (PPP-AR) solutions, and move towards faster convergence, the Canadian Geodetic Survey (CGS) is transitioning to a modern GNSS processing engine in August 2018.

What are the user benefits?
  • Height bias correction (4-5 mm)
  • Improved single frequency positioning (code & phase) solution
  • Support for RINEX v3
  • Machine-readable summary text file format allowing for easier automation
  • Capable of processing all GNSS constellations and signals (once IGS or NRCan precise products become available)
  • Improved integration with existing CGS transformation tools
  • This software upgrade is also the first step towards PPP-AR and co-operative PPP solutions allowing for faster convergence and shorter observation requirements in the future.
What will be the impact on users?
  • Submission interfaces and options will not change
  • Some outputs will change, with the most significant being the format of the summary text file (.sum)
  • Small height discontinuity (due to bias correction) for users analyzing static time-series

CSRS-PPP Outputs

For CSRS-PPP website users, the solution is returned via email at the address provided on the submission page. For PPP direct (desktop app) users, CSRS-PPP outputs can be returned via email and/or downloaded directly to a user-selected folder.

The new CSRS-PPP outputs
  • A solution report (.pdf) presenting the PPP results in a combination of textual and graphical information. For report descriptions see:
  • A summary file (.sum) which contains the parameters and the results of the PPP processing in (a machine-readable) text format. See summary description.
  • A position file (.pos) containing the positioning information for each epoch processed. See position file description.
  • A comma-separated (.csv) format text file containing the positioning and clock information for each epoch processed.
  • A JSON format residual file (.res) containing the solution residuals for each epoch/signal pair. See residual file description. Note that a tool to transform residual files from JSON format to text (ASCII) format is available here.
  • An error file in text (.txt) format containing any errors or warnings from the processing.

Sample Output Files:

Static Solution, Kinematic Solution, Residual File

Use of Canadian Geodetic Survey products and data is subject to the Open Government Licence - Canada

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