Originally Posted by
43Inches
……..GNSS, it can be turned off, jammed, hacked, whatever.
As was often the case when operating across southern and central Turkey during the Syrian crisis. It was not unusual to have minimal GPS satellites available and a
NAV GPS FAULT and GPS PRIMARY LOST for periods of time.
Some reading I did at the time surprised me:
The GPS signal is a low power signal. It is comparable to the power emitted by a 60W light-bulb located more than 20,000 km away from the surface of the earth. This means that the signal could easily be disturbed by any ground source located near an aircraft and emitting in the GPS L1 frequency band (1575.42 MHz +/-10 MHz), leading to the loss of GPS data