GPS jamming, spoofing, military, LORAN article

[Let'sgoflying!]

The experts among us will say it is nothing new, and perhaps inaccurate but I think some will enjoy reading.
http://www.csmonitor.com/World/Passcode/2016/0510/Why-GPS-is-more-vulnerable-than-ever

 

[Dr. O]

We will regret ending LORAN which was all but impossible to jam.

 

[Lachlan]

Can't spoof a pencil and paper chart...

 

[Velocity173]

Pencil, paper chart...and Doppler nav.

 

[ARFlyer]

It's insanely easy to jam as the signal sits at around -118dBm at your receiver.

 

[jkaduk]

...and Doppler nav.

I don't imagine too many people know what that is. INS is better anyway.

 

[Velocity173]

I don't imagine too many people know what that is. INS is better anyway.

http://www.baesystems.com/en-us/product/doppler-radars-for-helicopter-navigation

Secure (PPS) GPS gets jammed / spoofed, you fall back on Doppler. That somehow gets jammed, you fall back on paper. Of course, GPS, Doppler and INS combo would be the best, gotta work with what you're given.

 

[Somedudeintn]

I don't imagine too many people know what that is. INS is better anyway.

I understand the concept, but are there any commercial INS products for GA?

 

[MAKG1]

I understand the concept, but are there any commercial INS products for GA?

Yes, but not for light piston singles.

GA includes anything that flies Part 91. Including our 747. Honeywell sells a "micro INS" for the bizjet crowd.

 

[jkaduk]

I understand the concept, but are there any commercial INS products for GA?

I was speaking tongue firmly in cheek. Don't think there's much in the way of doppler either.

 

[Clark1961]

I was speaking tongue firmly in cheek. Don't think there's much in the way of doppler either.

These guys could probably whip something up:
http://www.sbg-systems.com/applications/avionics

 

[Velocity173]

Won't be long before a GPS/INS combo will be offered for small GA. Cost & maint will be the major issue.

 

[Clark1961]

Won't be long before a GPS/INS combo will be offered for small GA. Cost & maint will be the major issue.

I don't see the addition of INS as necessarily increasing maintenance costs. Sure, there's always software updates but the hardware should be robust. How often do AHRS fail?

 

[Velocity173]

I don't see the addition of INS as necessarily increasing maintenance costs. Sure, there's always software updates but the hardware should be robust. How often do AHRS fail?

Well, I won't mention the company that used make our EFIS, but our AHRS failed about every other year. Mech told me the AHRS box was 16K to replace.

I'm sure some company will come out with a box that's compact, cheap and with incredible reliability for small GA. I just haven't seen it yet. Not sure an INS backup is all that important when ground based NAVAIDs are still plentiful.

 

[Everskyward]

Our AHRS came from the factory with a glitch, on a new airplane, but that was probably infant mortality. They traced the fault to one, but they replaced both for good measure (obviously under warranty). The replacements have been fine for 6 years.

 

[Clark1961]

Well, I won't mention the company that used make our EFIS, but our AHRS failed about every other year. Mech told me the AHRS box was 16K to replace.

I'm sure some company will come out with a box that's compact, cheap and with incredible reliability for small GA. I just haven't seen it yet. Not sure an INS backup is all that important when ground based NAVAIDs are still plentiful.

I'm sure the failures are there but I haven't heard of folks replacing the AHRS on G-1000 or Aspens very often. Aspen did have a batch of bad sensors early in production. Haven't heard of major problems from the experimental guys and there are a lot of those systems out there.

 

[Velocity173]

I'm sure the failures are there but I haven't heard of folks replacing the AHRS on G-1000 or Aspens very often. Aspen did have a batch of bad sensors early in production. Haven't heard of major problems from the experimental guys and there are a lot of those systems out there.

I agree. Our G500H has been flawless in 4 years. Experimental, well for the most part, yes pretty reliable, that it unless you still have Blue Mountain. One of the reasons I don't fly IFR in my Velocity anymore is because of its BM EFIS.