User GNSS Receiver Calibration

demetra User GNSS Receiver Calibration

Calibration of GNSS stations for hardware time delay determination.


This Service aims at calibrating GNSS stations for timing applications, i.e. determining the hardware delays in the antenna, cables and receiver. Two methods can be used: absolute or relative. The absolute calibration uses a GNSS signal simulator and a Vector Network Analyzer which compares the simulated signal with the signal measured by the receiving equipment; the uncertainty on the measured delays is at the level of 1 ns. The relative calibration determines the hardware delays of the receiving chain with respect to a reference station already calibrated, with a combined uncertainty lower than 4 ns.


Features and benefits

The user will know the hardware delays of its GNSS receiving station, and will hence be able to determine accurately from the GNSS measurements the offset between its local clock and the GNSS time scale.
This service will allow GNSS time transfer with an uncertainty lower than a few nanosecond.

Time Service Details

Version: 1.0

Company: Royal Observatory of Belgium

Address: Avenue Circulaire, 3 – B-1180 Brussels

Contact with the company: email us




This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 640658. The Commission is not responsible for any use that may be made of the information this web contains.


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