REFLECTOR: NextGen NAV

[Mark Magee]

Hi Bill,
I posted about this in the past, it's probably in the archive: but to
summarize I was making a leg from KDVT (Phoenix area) to my home in KBBD in
central Texas in N34XL when I lost GPS halfway across southern New Mexico
eastbound and had to dead reckon to beyond ELP, about 45 mins. I had just
bought N34XL and was relocating it to my home, it only has GPS in the panel
and I had a backup Nav  for my IPad, both went down. On with ELP APP I
heard the controllers calling vectors for the SKED Airliners, and with SWAL
B37 drivers responding to controllers that they had lost primary nav. As
well I heard the controllers working F-18's, and finally after quite a
while flying dead reckoning (sandwiched in a corridor inside Restricted
Airspace) a controller on APP announced that GPS jamming was occurring in
the area, with no known time at which it would stop. I was just south of
White Sands NM when I lost GPS initially. I think I drove out of the
jamming area and regained GPS about 35 NM east of ELP, probably 145nm
without GPS.  Apparently US Military was conducting drills over White Sands
and was jamming GPS. I'm glad is was CAVU that day.
After this event, I reviewed this with a few B37 drivers at SWAL I know,
and they said that if close to restricted airspace in certain parts of the
country, GPS jamming is common. And the jamming spills out way beyond the
perimeter of the Restricted airspace. So the more active military OPS and
Restricted airspace you have in your local area the better chance you have
of losing your GPS in flight.
That's it in a nutshell.

Mark
On Sat, Dec 1, 2012 at 4:50 PM, Stockman, Bill <bill.stockman at daytonaero.com
> wrote:

> Mark
>
> I'm late to the discussion.   How did you know you were actually being
> jammed?
> ________________________________________
> From: reflector-bounces at tvbf.org [reflector-bounces at tvbf.org] On Behalf
> Of Mark Magee [edjonesbrady at gmail.com]
> Sent: Saturday, December 01, 2012 3:20 PM
> To: Velocity Aircraft Owners and Builders list
> Subject: Re: REFLECTOR: NextGen NAV
>
> On Dec 1, 2012, at 12:18 PM, James Lotspeich <jlotspeich34 at gmail.com>
> wrote:
>
> > On the flip side, GPS jamming is not exactly a common problem.
>
> True. Yet the fact it is so easily (and inexpensively) jammed is
> concerning. The first time you encounter your own personal session of being
> GPS jammed in-flight while PIC, behind  a panel with no VOR, NDB, ADF
> installed it greatly changes your perspective. Having my GPS jammed for
> almost 45 mins in-flight has turned me into an activist on this issue.
>
> Mark B. Magee
> Sent from IPhone 4S
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