I've had loss of GPS signals in an open sky situation near military bases and major electrical grid facilities. But Federal law prohibits the operation, marketing, or sale of any type of jamming equipment that interferes with authorized radio communications, including Global Positioning Systems (GPS). If you have reason to believe that someone is using a jammer you may file a complaint or submit an inquiry through the FCC Consumer Complaint Center by visiting the FCC Consumer Complaint Center at www.consumercomplaints.fcc.gov
It's no joke for them and they *will* follow up with an investigation with authority to arrest. Twice in the last 20 years I've been accosted by FCC enforcement in full regalia including body armor and sidearms in my boat's marina with a goofy looking handheld antenna searching for an illegal 1.5kw marine VHF booster which was stuck in transmit & splattering nearby airport comms. Turned out it was a recently arrived Mexican sport fishing boat who had no idea the rules were different in the US. The other sitch' was some guy running his ham rig on the marine SSB channels without a license.
It makes sense GPS was jammed but GLONASS came through given GLONASS is a multifrequency system and would require a different more complex jammer to bollix it. GPS jammers are small, available on the black market and can be powered by a car cigarette lighter DC supply and jam GPS signals for miles around their deployment. Witness:
Maybe Putin was there playing a round of golf.
Worked at a trucking terminal where the drivers were using these. Apparently company policy was fleet tracking that monitored speed etc. and this was their way to avoid being tracked.
Definitely made it hard to use the RTK. Would instantly lose all satellites once one came on site.
I submitted a report to the FCC and received an email thanking me and informing me that they do not investigate individual complaints. Government helps me once again...