[Beowulf] Re: Re: blackbox on Mars?
James.P.Lux at jpl.nasa.gov
Mon Oct 30 20:34:20 EST 2006
At 04:55 PM 10/30/2006, steve_heaton at iinet.net.au wrote:
>With my astronomy hat on...
>Of course what works in your favour for Earth imaging is that you're not
>struggling to grab photons. Looking up instead of down means your
>limited by the
>Reynolds number. On near-perfect conditions I think Keck can at best get about
>200mm of clear air. This is where that expensive, whizz bang
>Adaptive Optics kit
>gets the nod. Need to straighten those wavefronts!
>Looking down I suspect you face similar atmos problems. All those 'little
>lenses'. Not sure if the sodium layer would be a lot of help for a guide star.
>Can't remember the altitude. Hmmm... could be from LEO. Regardless,
>to straighten wavefronts if you know how they're bent in real time.
I think they do blind deconvolution of multiple frames of the same
subject. A notoriously compute intensive task, and one suitable for
a nice cluster. Who will be the first to image astronauts doing EVA
with a backyard telescope, firewire camera, and a home
cluster? Maybe you could do it when transiting the moon or sun?
Might hurt, might help.. certainly increases the contrast. The
background of the moon might give you a calibration target to work
with for your image processing (like the guide star). Probably
depends on the scale of the atmospheric irregularities you're trying
to calibrate out.
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