GNSS data abbreviations

Some of the most fundamental GNSS measurements retrieved from GNSS receivers include:

  • CNR: carrier to noise ratio or C/N0. The estimation technique varies between receivers. Typical values in the range 30..50 [dB Hz]
  • PSR: Psuedorange [meters]
  • ADR: accumulated Doppler range–carrier phase measurements [cycles]

Using networks of GNSS receivers along with appropriate post-processing techniques, estimated maps of vertical TEC (integrated electron density) can be derived:

Haystack TEC map

Haystack TEC map