Paul Leyland
unread,Oct 20, 2021, 12:08:20 PM10/20/21Sign in to reply to author
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Since running ANSVR on my telescope control system syncing the telescope
has become a doddle. The scope is pointed at a random bit of sky and a
5-30s exposure taken depending on how many stars are picked up. Plate
solving shows where the scope is pointing and the control software
(Maxim DL at present) then takes over from there. It is rare that
slewing is more than 5 arcmin away from the target and that error is
reduced to under 1 arcmin after another solve or two taken a good few
degrees away.
The main limitation is plate solving time. The server is configured to
use likely plate scales, corresponding to native image scale at typical
binning levels and the image is down-scaled as well. The supplied image
has target RA and Dec in its FITS headers but I have yet to find out how
to make use of them. Does anyone know?
It wouldn't work for the very first solve because the FITS headers will
not have usable coordinates, but subsequent ones could be made much more
efficient. Even for the first solution, I know roughly where I am
pointing (for instance, roughly due south, 45 degrees altitude, at known
latitude & longitude) and the UTC time. Again, any clues on how to
exploit this information? So far I have thought only of using
planetarium software to locate that piece of sky to 30 degrees, say, and
to solve the image "by hand". That is laborious and takes at least as
long as searching the entire database automagically.
No big deal but it would be nice to wait only 15 seconds instead of 150
seconds each time.