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technofetishism
30-07-2012, 11:07 PM
Has anyone here had a play with this piece of software for plate-solve syncs?

Looks to be a good way to improve goto accuracy for those ascom inclined.

Just waiting to get a copy of the astrometry.net index files before hopefully testing it out next clear night.
technofetishism
07-08-2012, 11:19 PM
completly sold on this for polar alignment, sub arc minute without too much work.
alistairsam
08-08-2012, 07:46 AM
Hi
It does sound good and i do want to try it out.
Is the astrometry.net index a paid product or open source?
Is there a windows version? Didn't see the link for the index files on the site
technofetishism
08-08-2012, 09:43 AM
the index files for astrometry.net are free, but not opensource.

http://trac.astrometry.net/browser/trunk/src/astrometry/GETTING-INDICES


Astrotortilla iteslf runs under windows and uses cygwin to do the astrometry.net platesolves.
http://sourceforge.net/p/astrotortilla/home/Home/

The install guide is worth reading as it gets you past a couple potential sticking points.
SteveInNZ
10-08-2012, 02:58 PM
Do you have a standalone (no internet required) installation with local indices ? How much disk space does it require all up ?
technofetishism
13-08-2012, 10:10 AM
Yeah, standalone. I dont think astrotortilla currently does web lookup.

Im only using the first 1 Gb worth of index files, down to 11 arcminutes, the whole index for all sky down to 2 arcminutes is about 26Gb I think. I might even be able to get away with less, but 1Gb is nothing in the scheme of things


From the README on astrometry.net

---------------------------------------------------------------
Index Filename Range of skymark diameters File Size
(arcminutes) (MB)
---------------------------------------------------------------
index-210+.tar.bz2 60 - 2000 29
index-209.tar.bz2 42 - 60 30
index-208.tar.bz2 30 - 42 61
index-207.tar.bz2 22 - 30 125
index-206.tar.bz2 16 - 22 255
index-205.tar.bz2 11 - 16 526
index-204.tar.bz2 8 - 11 1,023
index-203.tar.bz2 5.6 - 8.0 2,089
index-202.tar.bz2 4.0 - 5.6 4,260
index-201.tar.bz2 2.8 - 4.0 5,878
index-200.tar.bz2 2.0 - 2.8 10,058
--------------------------------------------------------------