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When I was working with the guidance systems on John Deere tractors we had occasions where we lost RTK guidance. The tractors use 900 Mhz radios and, while we couldn't prove it, we lost signal sometimes when oil field trucks went by. I assumed they were running hot radios to make up for the remote areas they cover. The oil field also control pump jacks, etc. remotely now and will send out a "clearing signal" to drop all signals so they can send their signal through. We had the biggest problem in the Lamesa area. I don't think it is supposed to be aimed at every body but just the oil field radios but it seems to bleed over sometimes. It also seemed to be isolated to small, seemingly random, areas. I spent about three years chasing after it off and on but could never get a definitive source, just too large an area and not frequent enough in one area. I bugged John Deere about it for those three years and John Deere shifted their signal to a less populated band and it seems to have helped. I don't know if my pestering had anything to do with it or it was just coincidence.

White Sands also throws out some jamming signals sometimes but I think it stays within GPS signals and not radio bands. I know some of our western stores had to deal with it occasionally.

We do have frequent Air Force traffic out this way so that could also be a possibility.