[Beowulf] Re: Re: blackbox on Mars?
James.P.Lux at jpl.nasa.gov
Mon Oct 30 17:34:20 PST 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.
More information about the Beowulf