On Jan 17, 2:25*pm, JS wrote:
On Jan 17, 9:28 am, Marc Ramsey wrote:

Bill Daniels wrote:
It seems as if GPS interference testing is becoming more widespread.

* As Marc noted, China Lake have been conducting these tests for a
while. It started out mostly on weekdays,

Bill and all,

Yes, this has been reality in the US for several years.
I managed to warn the 1-26 Nationals about 3 seasons ago, when they
faced blanking/testing for their national contest from Moriarty, NM.
I offered guidance for conversations, and they worked wtih the staff
at
White Sands to adjust the local tests to be prior to launch/flight/
task times.
Otherwise, you are right. Achieving turns could only have been
verified by cameras, again.

I raised the discussion to IGC level, about the possibility of world
record attempts
(which are possible from my site) having pre-launch authorization
possible for
antiquated validation/recording devices ( analog equipment!), but was
pooh-poohed as not having an authentic concern. At that point in
time,
we were hosting the Perlan glider with Fossett/Enevoldsen and it
was a VERY real concern for us. And it still is.

We are fortunate to have a close working relationship, and know on
any given week if jamming will occur for the following calendar week,
locally. It adds to the flight planning considerations.
I can have world class weather, military airspace permission and IGC
approved recording devices, and have a data file that is worthless
for
record documentation.

So, yes, we have tried for contingency planning. They work, within
the US.
And yes, your SSA airspace and technical folks ARE trying to serve
glider pilot interests in the larger sense.

Cindy Brickner
Region 12 Director
SSA Airspace Committee