I've experienced loss-of-signal of late, several times. I don't have a
spectrum analyzer here in Norman capable of seeing that frequency, but if
someone knows where we might find one... it could be an interesting fox
hunt.

73 gerry n5jxs

On Wed, Nov 7, 2012 at 9:50 AM, Zac Flamig <[log in to unmask]> wrote:

>  Just in case any of you guys know something...
>
> Zac
>
>
>
> -------- Original Message --------  Subject: Fwd: GPS Interference  Date: Wed,
> 07 Nov 2012 05:33:35 -0600  From: Bob Staples <[log in to unmask]><[log in to unmask]>  To:
> [log in to unmask]
>
> Please note the email from Forest Mitchell ( WFO) and advice me of anyone
> you know or that may be conducting experiments that would interfere with
> the GPS signal ?
>
> Thanks,
> Bob D Staples
>
>
> -------- Original Message --------  Subject: GPS Interference  Date: Wed,
> 07 Nov 2012 04:20:17 -0600  From: Forrest Mitchell
> <[log in to unmask]> <[log in to unmask]>  To: Bob Staples
> <[log in to unmask]> <[log in to unmask]>  CC: David Andra
> <[log in to unmask]> <[log in to unmask]>, [log in to unmask],
> [log in to unmask], John Pike <[log in to unmask]> <[log in to unmask]>,
> Daryl Williams <[log in to unmask]> <[log in to unmask]>, Doug
> Speheger <[log in to unmask]> <[log in to unmask]>, Rick Smith
> <[log in to unmask]> <[log in to unmask]>
>
> In the past week, we have been experiencing interference with acquiring
> a GPS signal for the radiosondes we launch for Upper Air flights. The
> GPS signal is critical towards acquiring accurate wind data aloft.
>
> The interference is centered around the NWC, as measured by coworkers
> using a variety of GPS devices. The interference occurs during the
> afternoons, affecting us
> during our launch window from 5-6:30 pm.  It then disappears around 7
> pm. There is no interference during the morning flights.
>
> Is there some experiment being performed by someone within the NWS
> community that could be causing the interference? We would appreciate
> your efforts to find the source
> so that we may create a solution to allow us to perform our mission in
> its entirety. Thank you.
>
>
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