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Signal Jamming

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Jim in AZ
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Anyone ever encounter a signal jamming issue? Our crew ran into a location where only GLONASS satellites were visible. They moved to a different location and had all the US sats back. Back to the first location and only GLONASS visible. Crew chief realized that they were close to a golf course and on a whim called them to see if their golf carts had radio communication or used GPS. He was told "No, but no one can get GPS signals on that hole. There is a neighbor who runs a jammer that blocks all the US satellites."

 

Did not expect that...

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Williwaw
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A military exercise few years back messed with us on and off for a week. They were flying F-22s overhead practicing operating in GPS jammed environment. We got to practice ourselves but not by choice.

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Rover83
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Uh, that's a federal violation. FCC will drop the hammer if someone would simply file a complaint with some info about where it's coming from.

Have seen this before. Complaint filed, federal offender smacked down, work resumed.

(ETA: for an idea of how seriously the FCC takes this, you can check out some of the fines on the sidebar on this page.)

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Jitterboogie
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@rover83 

Depends. They do routinely schedule and plan jamming and testing events, and post the MOA information as needed.  

We had a hell of a fun time doing lidar/OrthoPhoto when no one had bothered to check the FAA FCC and other adjuncts on one operation.

Planes are expensive to fly when you're not collecting data to charge any clients.

 

Check out the dates and verify you weren't in a shadow of predetermined jamming, but also file complaint if you're sure you weren't in their expected operations area.

Fun stuff.

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RADAR
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Jamming Prohibited

 

looks like they could be in for a slap on the wrist; better be careful. 

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Firestix
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Richard Imrie
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Just out of curiosity, a friend is asking how would one jam a satellite signal?

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dmyhill
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Shelby H. Griggs PLS
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@richard-imrie you wipe out ability to track on ground, not actually jamming at the satellite level. They are very weak signals. With my old (two generations back) receivers my then satellite phone could not be turned on within 300 feet of a receiver or I lost lock (they both operate in the L band). Maybe better RF rejection these days, but it is pretty easy to prevent tracking of a weak signal.

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