Oudie N GPS signal lost

[Sarel Venter]

I have deleted my airspace file like I said in an earlier post, but a few flights after that the Oudie N started playing up. The little Green GPS indicator on the screen would turn to Red and it says something like waiting for GPS signal. The IGC trace shows a gap until it picks up the signal again sometimes up to 30 minutes later. 

It is mounted with the bar code reader to the top and on my canopy so with clear view to the sky.

Has anyone had similar issue and found a solution for it?

I have an open support ticket with Naviter about the issue and will post back here if they manage to solve the issue.

Thank you,

Sarel Venter.

[Eric Greenwell]

Does it happen when Oudie N is out of the cockpit and away from the glider? Does your phone have GPS problems at the same time?

Eric

[Sarel Venter]

Eric,

It happens during flight, attached to the canopy inside the cockpit. The terrain where we fly is relatively flat with very few high mountains around.

I will check my phone's GPS signal when it happens again, but my lx9070 did not loose the signal. 

I will probably fly again later in the week again. 

Thank you, 

Sarel Venter. 

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[Jeff Stetson]

I haven't noticed interruptions with mine, yet. But several factors come into play. First, our cockpits tend to get cluttered with GPS devices. Too close, and they interfere with each other. Garmin, for example, states "When practical, installers should use 12 inch center-to-center spacing between antennas. If 12 inch spacing is not practical use a maximum center-to-center spacing from

adjacent antennas, but never less than 9 inch center-to-center spacing. Spacing less than 9 inches center-to-center results in unacceptable GPS/WAAS antenna pattern degradation." I found this to be true when I tried mounting my Sentry receiver next to the S-100 antenna; they didn't like that at all.   Additionally, Garmin states: "To limit degradation by windscreen effects, avoid mounting the antenna closer than 3 inches from the windscreen."

Second, GPS signal blocking and spoofing has become rampant. Notams will sometimes alert one to this, but I've run into it everywhere. Why? Anti-drone "guns" have spread from the military to many police departments where their use seems to be casual. Too, the kind of people who think it's fun to light up planes at night with lasers can easily get signal jammers to prove their manhood with. 

Spoofing is the worst of the two. Jammed and the avionics just quit. Spoofed, and they don't, but show you in the wrong location. Here's an example that I caught on my Foreflight track log. Calculated velocity and altitude are all over the place. This gave sink rate and terrain alarms in the cockpit. And no, my airspeed wasn't 238 kt.