I know there have been at least 2 threads about this already, but wanted to bring it up again. In addition to seeming fairly deaf to GPS satellites in the first place, we are seeing impressive inaccuracy in the height reporting of the USB GPS puck, in addition to it changing constantly. This is causing issues with stations not being able to maintain “fixed client” status.
See the graph below for an example over the last 20 hours or so for 4 customers. We are seeing reported elevation differences of up to 100 meters over the course of the day, which of course is an issue for the AFC status of these radios if they refresh at the wrong time.
I notice the heigh changing as well and I believe it leading to some of the problems we have periodically.
Everything I have is running 5.8.
I don’t have a graphing mechanism setup but I am sure if I did it would look like the OPs graph.
Often these swings, I think, lead to the SMs getting restricted by the AFC when they previously were not.
I have seen it Change the AFC data the APs get too. I makes it very difficult to troubleshoot when that data always seems to change when I am not looking at it and none of it is recorded in cnMaestro. 90% of the time cnMaestro doesn’t even get the IP or GPS coordinates.
Did anything become of this? We arent necessarily having issues with the fluctuations so much as just what seems to be the quality of the GPS receiver itself. At multiple locations with unimpeded view of the sky we have problems getting adequate signal. Our trucks and other things that rely on GPS signal for different functions have absolutely no issue.
