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>> You can observe lots of sky once a night, or you can observe a little of
>> sky a lot. Can't do both without a whole lot more money than there
>> is out there for this type of project.
Just need a couple or three similar systems in each hemisphere---
not that big of a deal. I think Pojmanski realizes his current observing
cadence isn't the best, and says as much at his Web site. A simple fix
would be to do blocks of fields that get two visits say an hour or two
apart. Another possiblity is to rig the fields with center-to-corner
overlaps so that any spot shows up in multiple frames in the course
of a night.
In general there's a trade-off between sky-coverage and magnitude
limit. If you want only mag. 8 or 9, just use a full-frame fisheye lens
for 35mm format with a ~25mm square chip, and you can get most of the
sky in a single shot. Pojmanski's system covers a 9x9-deg field and gets
the southern hemisphere on the timescale of 3 days or so down to mag. 14.
Scale cadence speed and magnitude limit from there.
\Brian
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