Check 900MHz noise. We have two sites with high 900MHz noise and those are the ones that have GPS issues.
On Fri, Dec 1, 2017 at 10:30 AM, Wireless Administrator <[email protected]> wrote: > Ok …… > I got it now. This was a test.(Tongue-in-cheek)Answer: “It radiation > from a nearby star”Steve B. > > > > > > *From:* Af [mailto:[email protected]] *On Behalf Of *Wireless > Administrator > *Sent:* Friday, December 01, 2017 10:26 AM > *To:* [email protected] > *Subject:* Re: [AFMUG] GPS visible vs tracked > > > > Is it possible to place duplicate equipment at the site to see if the > problem occurs on duplicate? > > > > Steve > > > > *From:* Wireless Administrator [mailto:[email protected] <[email protected]>] > > *Sent:* Friday, December 01, 2017 9:55 AM > *To:* '[email protected]' > *Subject:* RE: [AFMUG] GPS visible vs tracked > > > > I’ve had problems like that caused by water/condensation in the GPS > antenna or coax. > > > > Steve B. > > > > *From:* Af [mailto:[email protected] <[email protected]>] *On > Behalf Of *Eric Muehleisen > *Sent:* Friday, December 01, 2017 9:51 AM > *To:* [email protected] > *Subject:* [AFMUG] GPS visible vs tracked > > > > We have a site where we see unusual GPS issues. I've been graphing the > CMM4 and it visually sees between 10-15 satellites consistently. However, > tracked satellites will go from 8-10 and drop to zero for hours at a time, > then fully recover. This happens randomly a few times a week. It's gotten > worse over the past month. > > > > See attached. If you notice, there is an FM antenna right next to our > equipment. We have occasional ethernet related issue as well. This tends to > get worse when it rains, but overall hasn't been a major issue. > > > > Could our GPS issues be related to the FM station? We plan on moving the > GPS antenna to another location next week. Has anyone seen anything like > this before? >
