Dangerous GPS jamming?

On 2/28/2013 6:00 PM, Don Johnstone wrote:
I sometimes wonder if some people have a grip on reality. The GPS system as
we know it is a military system, designed to help our forces in times of
conflict. We use it for free and over the years the civilian use has
improved, we no longer have position errors created by the system.
Given it's primary pupose do we really want the pilots who fight using the
system to experience jamming for the first time in real combat? Might it
not be a good idea to train for the eventuality in a realistic fashion? A
small inconvieniece to contests and soaring claims is a small price to pay
to save lives of military pilots and civilians who might collect an
explosive delivery if the first time they see a jammed GPS is in combat.
Stop whining about it, deal with it in an adult fashion for pitys sake.


Couldn't the military pilot accomplish the same thing just by turning
off the GPS on his plane?

No.
He needs to be able to recognize when the system is being jammed and how to work around it.
The fail safe for the pilot navigation system is that the GPS feed into the INS exceeds the kalman filter limits and is disregarded. However, there are weapons that rely on GPS for terminal guidance. the pilot has to learn and adapt by making realtime in the air decisions and act.

I agree that as the FAA moves toward relying more and more on ADS-B, which requires WAAS data quality, the GPS recievers have to be more secure to reject any jamming inputs. Jamming can introduce false data into the GPS navigator, or totally block the signal.

BT

On Thursday, February 28, 2013 7:33:33 PM UTC-7, Greg Arnold wrote:
On 2/28/2013 6:00 PM, Don Johnstone wrote:

I sometimes wonder if some people have a grip on reality. The GPS system as

we know it is a military system, designed to help our forces in times of

conflict. We use it for free and over the years the civilian use has

improved, we no longer have position errors created by the system.

Given it's primary pupose do we really want the pilots who fight using the

system to experience jamming for the first time in real combat? Might it

not be a good idea to train for the eventuality in a realistic fashion? A

small inconvieniece to contests and soaring claims is a small price to pay

to save lives of military pilots and civilians who might collect an

explosive delivery if the first time they see a jammed GPS is in combat.

Stop whining about it, deal with it in an adult fashion for pitys sake.





Couldn't the military pilot accomplish the same thing just by turning

off the GPS on his plane?

"Couldn't the military pilot accomplish the same thing just by turning
off the GPS on his plane?"


I think GPS testing may also include misinformation broadcasted to confuse the enemy. While flying during GPS testing some soaring pilots have noticed position errors, up to one hundred miles or so.

Are we surprised?... http://en.wikipedia.org/wiki/Battle_of_the_Beams

Did Churchill really have English scientists divert WW2 German aircraft so that they bombed Dublin? Just think what we could do with jammed GPS - precision guiding weapons to the wrong target!

Mike