4 ms·
Depends where the plane is. High altitude, away from any precision navigation areas, not a huge risk. Flying a GPS approach to an airport - definite risk. Be
by NickNameNick 6y ago
Depends where the plane is.
High altitude, away from any precision navigation areas, not a huge risk.
Flying a GPS approach to an airport - definite risk.
Bear in mind that a GPS satellite has a power budget of ~4kw, and it's >12,000 miles up.
A jammer may only have a watt or two of transmit power, but it can put all of that into a single channel, and it's only going to be a few miles away from your receiver.
- userbinator 6y agoYou're off by around an order of magnitude: https://apps.fcc.gov/els/GetAtt.html?id=110032&x= https://apps.fcc.gov/els/GetAtt.html?id=110032&x=. Transmitter power is only 25W. EIRP is ~450W.
- sudosysgen 6y agoOf course. But then you'd have to do it while right next to an airport, which is a quick ticket to jail. In practice, the aircraft will do a go around then proceed with ATC vectoring or inertial navigation.
- angry_octet 6y agoAh no. Directional GPS jamming is quite effective with an easily sourced satellite TV dish, a tripod and some straight forward electronics. You can even point it at a plane using their own ADS-B signal. PPDs are omnidirectional, but quite hard to precisely geolocate when intermittent and moving, as was the case in the well known Newark events (which shut down a major airport). Airports with difficult approach (like the old Kai Tak in HK) could easily result in CFIT with only small errors, let alone other aircraft.