Re: My problem or yours?/test

[Chris Albertson <chrisalbertson90278@yahoo.com>]

Tom,

Here is one test:

1) ask DS-9 how big the image is.  Does it match the number
of image pixels on the CCD chip?  This is not the same as
the number read out.

2) Look at the edges of the image.  Does the image extend to
all four edges or is there a "frame" showing?  You may need
to enlarge the image 4x or more to see it.

If the size is correct and there is no frame then DS-9 must
have figured out how to find the "good" pixels, likely by
reading the header.

Andrew has told us all how we can mass-edit an entire directory
of FITS files to corect the header line.

         hedit *.fit datasec '[ 17:2041, 3:2033]'

Is the image realy that size? I'd expect it to be square.



--- Tom Droege <tdroege@veriomail.com> wrote:
> I have been using DS-9 to read the images.  They come up with DS-9
> with the 
> right orientation, and the right coordinates.  To a degree or so.  It
> is 
> good enough that even with a pretty bland field (no really bright
> stars) I 
> can match the fields up to the sky atlas.
> 
> This is my test of the fits header.  If anyone has a better test, I
> will 
> start using it.
> 
> Tom Droege


=====
Chris Albertson 
  Home:   310-376-1029  chrisalbertson90278@yahoo.com
  Cell:   310-990-7550
  Office: 310-336-5189  Christopher.J.Albertson@aero.org

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