Re: Progress as Usual

[Tom Droege <droege@wwa.com>]

Chris and all,

Well, it gets to be a big deal pretty fast.   I have 40 or so disks in .fts 
format but with the wrong headers.  To change them, I have to load them all 
in a directory (20 GBytes at this point) and then do the global edit, and 
then save them back on CD ROM.  There ae 3200 files and growing every clear 
night.

I am hoping that those 200 disk players can some day be set up to read real 
files.    We just have to convince the music people that they want to 
access all their music on line.

It is a big job that will never be done unless there happens to be 
something or real interest going on on these disks.  Not much of a 
chance.  So it will be best to do it right the first time.   I am doing it 
for practice at this point.  But possibly one of you would like the fun of 
reducing this data.  As Jure has demonstrated, you can even locate asteroids.

I agree, the archive file wants to have everything possible on it.  Seems 
to me that we should process images in real time as we take the data, then 
add all the stuff from processing into the .fts header, then keep the raw 
data with the fixed up header like the WCS addition.

Tom Droege



>Fixing up the FITS header is no big deal even if there are 1000 files to
>be fixed up.  There are a couple programs around that can apply a set of
>changes to an entre directory of files.
>
>On my to do list is to verify that my Mk IV real-time program writes out
>FITS headers as per Jure's suggestion.  I think it does.
>
>One thing I thought of that I'll ssuggest we concider:  I seems that we all
>want to keep the raw image data, Tom is keeping it just as it came off
>the camera and Arne has suggested after 10X compression.  After reading
>Jures tech note I thinkg we should at least modify the header to include
>corrected WCS (ra, dec, image scale and rotation and maybe more) before
>the data is archived.
> >
> > Tom Droege
>
>--
>   Chris Albertson
>
>   calbertson@logicon.com                  Voice: 626-351-0089  x17
>   Logicon, Pasadena California            Fax:   626-351-0699