Got up early to take a crack at Jupiter and Saturn. I mistakenly thought that the GRS would be visible (mistook today for yesterday, I think.) Anyway, I'm focusing a lot more carefully than I'd been and have decided that a major portion of what's left in terms of fuzziness is coming from vibrations in the ETX clock drive. This morning I tried 'jogging' the guide button. This causes the drive to "burp" a bit, making for a potential bad frame if it gets taken during the move, but followed by a couple of good frames as the drive waits to start up again. At 15 arcsec per second, a 1/30 sec exposure only drifts .5 arcsec while the drive is just sitting there, which is acceptable.
September 10, 2000
Anyway, this is my current theory, and I'm sticking with it until I change my mind.
Oh, and I'm displaying images twice as big as I've been. Halving the sizes makes them look sharper, but it seems like a crutch.
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