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Old 25-12-2017, 12:29 PM
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LewisM
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Join Date: Aug 2012
Location: Somewhere in the cosmos...
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Quote:
Originally Posted by OzEclipse View Post
...the sonic boom, we mutually agreed it was 2-3 minutes after the visible burn up. 3 minutes equates to 90km



Joe
Are you sure on that math Joe?

I get roughly 200,000ft / 61km altitude. Using a mean speed of sound of 661.06 knots / 343 m/s (taking into account temperature RISE above the stratopause in the mesosphere, and temperature drop in the stratosphere).

That's a vertical distance, ignoring slant range, which simply complicates things WAY too much as it introduced many more variables.
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