"Paul Sengupta"
wrote:

How do you measure altitude at 328k feet? Surely a standard
barometric device isn't going to work?

I set my Tivo to record the CNN coverage and Dick Rutan
mentioned that there were two tracking stations monitoring
the flight that could verify altitude to about "this far"
and he held his hands about 2 feet apart. I "think" he said
they were optical tracking stations. I presume there's
another form of on-board altimeter for measuring low
pressure or perhaps a radar altimeter.
Todd Pattist
(Remove DONTSPAMME from address to email reply.)
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