Hiking in California? They be messin' with your GPS...

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Hiking in California? They be messin' with your GPS...

Postby ribuck » Wed 08 Jun, 2016 8:08 pm

The US Navy is messing with GPS on selected days this month for users in California. FAA notification here:
https://www.faasafety.gov/files/notices ... visory.pdf
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Re: Hiking in California? They be messin' with your GPS...

Postby Gadgetgeek » Wed 08 Jun, 2016 8:32 pm

Reasons to keep your map and compass skills up. Its easy to get in the habit of relying on GPS, but its a toy we get to play with only at the pleasure of the US military.
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Re: Hiking in California? They be messin' with your GPS...

Postby GPSGuided » Wed 08 Jun, 2016 9:09 pm

'Weapon testing' out of China Lakes. How interesting!

So what's their expected outcome? A bunch of aircrafts crashing and traffic congestion in LA/SF due to failed GPS systems? Fortunately GLONASS will be still up and running. LOL
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Re: Hiking in California? They be messin' with your GPS...

Postby Mark F » Wed 08 Jun, 2016 10:19 pm

Don't worry about GLONASS, see if the BeiDou gps system (Chinese) is still operational.
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Re: Hiking in California? They be messin' with your GPS...

Postby Hallu » Wed 08 Jun, 2016 11:17 pm

What a bunch of morons... What if a guy is lost and his life depends on his GPS ? Can't they test it on a smaller range ?
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Re: Hiking in California? They be messin' with your GPS...

Postby GPSGuided » Thu 09 Jun, 2016 12:23 am

Beidou hasn't completed global coverage, has it?


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Re: Hiking in California? They be messin' with your GPS...

Postby Gadgetgeek » Thu 09 Jun, 2016 8:50 am

They are probably testing there as most of the airports won't be reliant on GPS for anything besides lost tourists. The size of the area probably has a lot to do with the laws of physics, line of sight and all that. Also reasons why its a listed NOTAM, since autopilot systems don't have to use GPS. I'd suspect that they would also be testing to see if what they are doing disrupts the international systems as well, or rather that might be the primary goal of the testing.

Hallu, if someone is lost and their life depends on their GPS then they should have stayed in bed that morning. And I say that as someone who relies on my GPS for street nav far too much.

Keep in mind that the EPIRB system will still work since the sats can get a general triangulation, and the search aircraft can get a closer fix.
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Re: Hiking in California? They be messin' with your GPS...

Postby GPSGuided » Thu 09 Jun, 2016 11:24 am

More reason why I look forward to the general availability of the European Galilleo system along with a diversified network from GLONASS and BeiDou. I never liked the idea of how the US can easily disrupt US owned GPS network when they care to.
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Re: Hiking in California? They be messin' with your GPS...

Postby icefest » Thu 09 Jun, 2016 11:51 am

From the map given by the link in the OP's post, I think this is testing an interference based electronic countermeasure.

Probably testing whether they can block Galileo/GLONASS/Civillian GPS while still maintaining use of military signals.

I suspect this is ground and not satellite based (the remote site are only not working at high elevation).
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Re: Hiking in California? They be messin' with your GPS...

Postby GPSGuided » Thu 09 Jun, 2016 12:07 pm

It's GPS specific by the advisory. Who knows what they are testing, classified.
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Re: Hiking in California? They be messin' with your GPS...

Postby walkon » Thu 09 Jun, 2016 1:08 pm

In one of the gulf wars the us moved the goal posts then as well. Had users going all over the place. Marine users and hikers were getting lost then too
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Re: Hiking in California? They be messin' with your GPS...

Postby GPSGuided » Thu 09 Jun, 2016 1:20 pm

I recall that the US GPS has been legislated or whatever since that time, in that the US military is no longer allowed to alter the signal to induce location errors. So in theory that users will no longer get to the wrong destination. The current testing seemed to be more about jamming, where users won't be able to receive the necessary GPS signal to achieve a location lock, a scenario where the user knows he/she is lost and can not get assistance from the GPSr.
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