3 ms·
> GPS could be degraded or shut off, but of course everyone noticed that weakness so we now have Russia's GLONASS, China's BDS and EU's Galileo. All of which u
by throw0101a 4y ago
> GPS could be degraded or shut off, but of course everyone noticed that weakness so we now have Russia's GLONASS, China's BDS and EU's Galileo.
All of which use the same very small, very narrow, band of frequencies—sometimes the exact same frequency of GPS:
* https://gssc.esa.int/navipedia/index.php/GNSS_signal https://gssc.esa.int/navipedia/index.php/GNSS_signal
You jam L1 (1575.42 MHz) and you take out a whole bunch of services out.
It's one of the reasons why there's L2, L5/E5, and E6. But everything is in the Aeronautical Radio Navigation Service and Radio Navigation Satellite System bands.