The following info came from: https://www.aopa.org/news-and-media/all-news/2020/january/14/gps-jamming-expected-in-southeast-during-military-exercise#.XiCoDqIicoo.link
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The FAA has posted a?ÿflight advisory?ÿfor the exercises that will require jamming of GPS signals for periods of several hours each day of the event. Navigation guidance, ADS-B, and other services associated with GPS could be affected for up to 400 nautical miles at Flight Level 400, down to a radius of 180 nm at 50 feet above the ground.
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The flight advisory encourages pilots to report any GPS anomalies they encounter. Reports may be submitted using this?ÿonline form.
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AOPA?ÿreported?ÿon a similar event in the southeastern United States in 2019.
AOPA is aware of hundreds of reports of interference to aircraft during events around the country for which notices to airmen were issued, and we consider the risks to GA aircraft highly concerning.
In one example, an aircraft lost navigation capability and did not regain it until after landing. Other reports have highlighted aircraft veering off course and heading toward active military airspace??and the wide range of reports makes it clear that interference affects aircraft differently. In some cases, recovery from signal interference may not occur until well after the aircraft exits the jammed area.
In a January 2019 AOPA survey, more than 64 percent of 1,239 pilots who responded noted concern about the impact of interference on their use of GPS and ADS-B.
AOPA continues to advocate for officials to place more focus on efforts to address the well-documented safety concerns raised by such events.
I was driving along the Gulf Coast adjacent to Eglin AFB a few years back and my navigation GPS (Garmin) was showing me way offshore.?ÿ I have no doubt they were spoofing the signal. Back when GPS was a military only system I could see how they could justify it. But now, since EVERYONE depends on GNSS for so many things, including aviation, they should not be screwing with it. At least if a receiver is multi constellation it should be OK, but I know that the Garmin 430, which we have in all three planes, is GPS only. My smartphone is at least GPS+Galileo+Glonass.
I wonder how jamming one constellation would affect the others? I guess if the jamming signal was wide enough it could affect other constellations.?ÿ
What will happen when we start seeing a lot of autonomous vehicles on the road? And in the air and on the seas...
Well, since the military started it and it's their property so it's hard to complain...
Consider an unforeseen event in which gps could be denied or dithered without warning!
and solar activity and geomagnetic storms.
So always have plan B.?ÿ
