[time-nuts] Water on Enceladus - What does this imply about NASA'a ability to measure frequency?
Dr. David Kirkby
drkirkby at gmail.com
Fri Apr 4 08:01:12 EDT 2014
On 4 Apr 2014 08:55, "Tom Knox" <actast at hotmail.com> wrote:
> 90 microns is approx a freq res of about 1 x 3.66 -12
> Thomas Knox
Since the Doppler shift is prortional to the frequency, I can't see how
one can determine the absolute frequency.
But given light travels at 3e8 m/s and they can resolve 9e-5 m/s, I would
have thought that the frequency resolution needed was 9e-5/3e8=3e-13. We
are differing by more than a factor of 10.
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