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-   -   IR (infrared) night vision video - amazing! (https://www.pprune.org/tech-log/257837-ir-infrared-night-vision-video-amazing.html)

RobertS975 3rd Jan 2007 01:11

Cat C aircraft approach minimums at KASE are 2400 and 3. So the last minute or two of any approach will be visual at Aspen.
http://www.fboweb.com/dpp/05889LDE.PDF

http://www.fboweb.com/fb40/airport/ASE.html

formulaben 3rd Jan 2007 02:24


Originally Posted by npasque (Post 3041602)
very nice. from watching the video, i believe the IR provides somewhat of an illusion which leads you to believe that you are higher than you actually are. comparing the two (IR and normal), i would have placed at least a 500ft difference between the two at many stages of the approach (again, that illusion).

Part of that is the misalignment of the cameras, and part of it is the difference in the field of view (FOV) in each. Look at the video after they land and notice the difference. The "witness" camera (the one on the right side of the video) could have been better aligned.

formulaben 3rd Jan 2007 02:32


Originally Posted by Double Zero (Post 3041671)
It might be of interest to know these night vision devices have a short life - less than 50 hours - and fail without warning...might have been better off without them !

Luckily mine failed ( somewhat prematurely I felt regarding the cost, though naturally about a second after the guarantee expired ) on my boat so I was able to pull up in time, but I'd think long & hard before flying even with latest standard NVG's.

As mentioned, they also give a wierd aspect, and are notorious in the military for restricting peripheral vision - important if one's trying to hover a Harrier - no, the nearest I'll get to that is a sim, but I knew Test Pilots who complained about it...

Also the cabin lighting has to be compatible.

DZ

The technology you are talking about is NVS. This video is EVS which is an Infra-Red based video which is TOTALLY DIFFERENT. The MTBF (meam time between failures) for modern (uncooled) EVS technology is measured in THOUSANDS of hours.

Old Smokey 3rd Jan 2007 02:42

So, if there is a modestly high (but acceptable) failure rate, simply do what is done with Radar and Transponder/TCAS, carry a second system!

Regards,

Old Smokey


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