pygpsclient 1.5.8 does not honor the central frequency for RF3 in MON-SPAN and plots it over RF2
<UBX(MON-SPAN, version=0, numRfBlocks=3, ..., center_02=1191937500, ... ,center_03=1254906250,...

GNSS/GPS Device
- Device Model/Generation: u-blox ZED-X20P
- Firmware Version: HPG 2.00
- Protocol: 50.02