GLONASS Slot and Frequency Numbers

When a GLONASS PRN in a log is in the range 38 to 61, then that PRN represents a GLONASS Slot Number where the Slot Number shown is the actual GLONASS Slot Number plus 37.

Similarly, the GLONASS Frequency shown in logs is the actual GLONASS Frequency plus 7.

For example:

<RANGE COM1 0 82.0 FINESTEERING 1729 155076.000 02004000 5103 11465
46
31 0 24514687.250 0.064 -128825561.494675 0.010 3877.473 45.0 563.310 18109c04
...
46 5 24097664.754 0.213 -128680178.570435 0.014 -3740.543 40.6 10098.600 08119e44
'''
8 0 39844800.076 0.043 -160438471.200694 0.013 -392.547 42.5 12038.660 00349c84

when 31 is a GPS satellite, 8 is a BeiDou satellite and 46 is a GLONASS satellite. Its actual GLONASS Slot Number is 9 and its frequency is -2.

Refer to PRN Numbers for more information about GLONASS PRN numbers. Also, refer to An Introduction to GNSS available on our website at novatel.com/an-introduction-to-gnss for more information.