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D region

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Archaenon
48847.  Wed Feb 01, 2006 4:17 pm Reply with quote

The area where it's the lowest ionospheric level where radio waves can't be transmitted. I belive it's between 70 and 90km. It's also the only region that the free electrons floating around at night combine back in with the oxygen ions to form oxygen molecules.
So it's like a sort of a 'hole in the sky' for planes to hide in to avoid radar at night. Nifty , eh?
Well , now looking at Wiki , it's 50 to 70km.

Link:
http://en.wikipedia.org/wiki/D_region
http://www.sec.noaa.gov/rt_plots/dregion.html

This came from a debate about the SR-71/Blackbirds flying limits and such compared to the newer stealth bombers.

 
Jenny
48914.  Wed Feb 01, 2006 8:27 pm Reply with quote

I like that as a way of getting into the D series - 'You are now entering the D-region... there will be a period of radio silence. So watch TV instead!'

 
Archaenon
48935.  Wed Feb 01, 2006 10:51 pm Reply with quote

Jenny wrote:
I like that as a way of getting into the D series - 'You are now entering the D-region... there will be a period of radio silence. So watch TV instead!'


Of course it would have to be taped , live in front of a studio audience on a high altitude bomber or transport plane. Like a re-furbished Stratofortress.

 
Gray
48954.  Thu Feb 02, 2006 5:27 am Reply with quote

I'm not sure they do space-suits in elf sizes...

 

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