Multi-channel GPS/GLONASS common-view between NIST and USNO

Both National Institute of Standards and Technology (NIST) and United States Naval Observatory (USNO) now operate a commercial 12-channel common-view receiver. The receiver tracks the GPS (Global Positioning System) satellites and the GLONASS (Global Navigation Satellite System) satellites. In this paper, we evaluate the receiver's performance using the common-clock, common-view calibration data. We also study the performance of multichannel GPS/GLONASS common-view between NIST and USNO. The common-clock, common-views using multichannel GLONASS C/A (Coarse/Acquisition) code and single-channel GLONASS P-code (precise code) contained very little transfer noise. A diurnal effect was noticed in the multi-channel GPS C/A code common-clock, common-view calibration. For the common-view comparison between NIST and USNO, the increased number of daily common-view tracks and the more precise measurements with GLONASS P-code reduced the transfer noise in short term. The multi-channel GPS/GLONASS common-view was influenced by some periodic systematic errors in long term.