[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [TASS] Non-Linearity of Mk IV Images
Tom Droege wrote:
> Ted and all,
> This must be a solved problem. All those astronomers out there already
> have this problem so there must be programs out there that have worked this
> out. The problme is probably adopting them to our particular situation and
> putting them into our software control system. ;^)
Tom's right. I think astronomers have been doing this from
the days of glass plates. There is a pair of functions in the
CFITSIO library that will convert x,y on a CCD to ra,dec and
the other way around. The routines handle the polar area,
rotated CCD chips and the projection of a shpere onto a plane.
There are likely many more libraries with this function.
--Chris Albertson home: firstname.lastname@example.org
Redondo Beach, California work: email@example.com