Pseudo-random number for the SV, or FCN/OSN number for Glonass. The distinction is made by looking at constellation field. Values should be in the range of:
GPS: 1-32
SBAS: 120-151, 183-192
GLONASS: 1-24, the orbital slot number (OSN), if known. Or, if not: 93-106, the frequency channel number (FCN) (-7 to +6) offset by + 100 i.e. report an FCN of -7 as 93, FCN of 0 as 100, and FCN of +6 as 106.
Content and code samples on this page are subject to the licenses described in the Content License. Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.