California Surveyors Forums

I was working out in sticks on Tuesday with my RTK unit. It seemed to fix right away in the morning but by mid morning I had a horrible time getting a fix... The radio signal was 100%, number of sats and geometry seemed good enough. But seemed to take forever to get a fix, and when it had one, it wouldn't hold it.

Did anyone else have any problems, I'm suspicious that there was something going on that I was not aware of. FYI this was in extreme northern CA.

Thanks, I really do appreciate any input.

had all 6 up and running all lost at least 17 epochs, 2 of them lost 240 epochs

You might wish to check NOTAMS (below link) before heading to field . . . as the FAA does GPS testing and gives Notices to Airman of a particular testing areas (with radius, altitudes, etc.) as potentially unreliable.

Phil - Sonoma


https://pilotweb.nas.faa.gov/PilotWeb/

PS I don't know if they have "archival" NOTAMS that you may go back in time to see if such testing was done on the day you were having problems.

Did you check the SPACE Weather? Often you will get spikes in radiation from the Sun that will really mess with GPS.

Stephen Johnson wrote:Did you check the SPACE Weather? Often you will get spikes in radiation from the Sun that will really mess with GPS.

I was thinking the problem was either a solar storm or the DOD. How would I check the "SPACE Weather"? Is there a website I can check?

Thanks,

How would I check the "SPACE Weather"? Is there a website I can check?

There are a number of them out there, but here are a couple of the more useful ones:

http://www.swpc.noaa.gov/
http://www.spaceweather.com/

Static solved just fine, even with the missing epochs

Thank you gentlemen for the information.

Jim Frame wrote:There are a number of them out there, but here are a couple of the more useful ones:

http://www.swpc.noaa.gov/
http://www.spaceweather.com/

Jim,

Thanks for your timely and knowledgeable insertion of information.