Some tests of GLONASS precise-code time transfer

The current GLONASS constellation presently comprises 15 active satellites which can be used for time transfer. Most characteristics of the GLONASS signal are similar to those of GPS. In addition the GLONASS P-code, unlike the GPS P-code, is available to civil users and it is of great interest to take best advantage of it. GLONASS P-code pseudo-range measurements are considerably more precise than comparable GPS or GLONASS C/A-code measurements. In this paper we describe several tests of the GLONASS P-code for one-site comparison and continental and intercontinental time transfer.