Correction of the Ionospheric Delay on GLONASS using the GPS Navigation Message
1999 Volume 1999 Issue 93 Pages 1-9
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1999 Volume 1999 Issue 93 Pages 1-9
The navigation message of a GLONASS (GLObal NAvigation Satellite System) does not include ionospheric parameters. So we can not correct the ionospheric delay when we use a L1-GLONASS receiver. This paper shows a correction of the ionospheric delay of a L1-GLONASS signal by using ionospheric parameters in the GPS navigation message.
We placed L1-GLONASS receivers of 8 channels in different places of Japan (Sapporo, Tokorozawa, Fukuoka, and Naha). These receivers include a GPS receiving unit. The ionospheric delay at the GLONASS frequency was calculated from the delay at a GPS frequency. We corrected GLONASS pseudorange by using the ionospheric delay at the GLONASS frequency.
The GLONASS vertical bias error was reduced to a few meters from a few ten meters by using the ionospheric delay correction.
