by NoelC » Tue Aug 28, 2007 10:33 pm
What caught my eye was the sharpness of the edges of the satellite, where it meets black space. It's pretty round, and seems to have a relatively believable brightness falloff for a satellite with an atmosphere. It is likely wavelet and/or deconvolution processing parameters were chosen to accentuate this edge sharpness.
I doubt very seriously that anyone selected 409 frames by hand, but rather used software to statistically select the sharpest frames by comparison to the others. That's how Registax can be set to work, for example.
Regarding resolution of surface detail on a satellite of Jupiter... I see quite a bit of surface detail on Ganymede in
the APOD of March 29. Certainly not in a completely different ballpark from that in the more recent APOD.
Personally I see no reason not to believe the detail shown on Ganymede is real.
P.S., Case, the image you point to is shown as a "Simulation" on CloudyNights.com. Have you any info how that image was created?
-Noel
What caught my eye was the sharpness of the edges of the satellite, where it meets black space. It's pretty round, and seems to have a relatively believable brightness falloff for a satellite with an atmosphere. It is likely wavelet and/or deconvolution processing parameters were chosen to accentuate this edge sharpness.
I doubt very seriously that anyone selected 409 frames by hand, but rather used software to statistically select the sharpest frames by comparison to the others. That's how Registax can be set to work, for example.
Regarding resolution of surface detail on a satellite of Jupiter... I see quite a bit of surface detail on Ganymede in [url=http://antwrp.gsfc.nasa.gov/apod/ap070329.html]the APOD of March 29[/url]. Certainly not in a completely different ballpark from that in the more recent APOD.
Personally I see no reason not to believe the detail shown on Ganymede is real.
P.S., Case, the image you point to is shown as a "Simulation" on CloudyNights.com. Have you any info how that image was created?
-Noel