[time-nuts] Re: GPS Elevation Mask Values.

[Dana Whitlow]

Dan, could it be that you have a spoofer in the area?

Dana


On Sun, Nov 14, 2021 at 4:27 PM Dan Kemppainen <dan at irtelemetrics.com>
wrote:

> Hi,
>
> Still trying to sort out the cause of that 'finger' of signal.
>
> Hooked up two more different GPS modules. A ZED-F9P, and a Jackson Labs
> LTE-LITE eval board.
>
> The F9P sees the same finger in the north as the other Ublox GPS module.
> The Venus receiver in the LTE Lite does not report signal above the
> north pole. See attached images.
>
> The data for these images was all recorded concurrently. All three GPS
> Modules are attached to a splitter on the same antenna, with nearly the
> same length jumper cables running from the splitter to each module.
>
> Currently running the same test again with the Ublox Timing module, the
> LTE Lite, and an adifruit "Ultimate GPS Breakout board V3" (MediaTek
> MT3339).
>
> Dan
>
>
>
> On 11/11/2021 3:30 AM, time-nuts-request at lists.febo.com wrote:
> > Message: 1
> > Date: Wed, 10 Nov 2021 09:54:09 -0500
> > From: Dan Kemppainen<dan at irtelemetrics.com>
> > Subject: [time-nuts] Re: GPS Elevation Mask Values.
> > To:time-nuts at lists.febo.com
> > Message-ID:<aa2e648c-79b5-f680-e573-53da374e5957 at irtelemetrics.com>
> > Content-Type: text/plain; charset=utf-8; format=flowed
> >
> > Hi,
> >
> > So, that finger of signal appearing above the north pole shows up even
> > after the GPS survey is done. Any ideas on how to figure out what's
> > causing that?
> >
> > My first thought is to try look at it with a different model of GPS unit.
> >
> > Is it possible it could be a signal reflection in the cable or something
> > weird going on in the feed???
> >
> > Another thought would be to log the GPS data, to sort out which birds
> > the GPS thinks is up there. Comparing to where they actually are would
> > help sort out what the signal might be bouncing off of.
> >
> > Dan
> >
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