From: Steve Larson [slarson@pirl.lpl.Arizona.EDU]
Sent: Tuesday, December 23, 2003 12:00 PM
To: mgordon@mail.arc.nasa.gov
Cc: slarson@pirlserver.lpl.arizona.edu
Subject: Re: WHT Ring Plane Crossing Archive

Mitch-

I have looked at (finally) the WHT RPX disc and have these 
problems/comments:

I was unable to access the .img binary files from IRAF (what I usually 		corrected header problem?
use for data analysis) - I get an error message "ERROR: Seek error on 
file...". Used the aareadme treatment to fix the line termination for 
UNIX and got the same error. The .lbl file claims good fits format 
(2880 byte blocks) and # records in header. 
Does it matter that the header is ascii and the images is binary? I seem to recall that fits images in the PDS/SBN required concatenating header and image files that IRAF could then display, but that is not the case here. IRAF does 
not display the headers with the imhead command. Looks like a problem 
recognizing the files within IRAF. Unfortunately, I am not aware of 
any other fits display on my Linux machine. I had this same problem 
with the images in the calib, e_ring and mainring directories. Maybe I 
am doing something dumb.

I had no problem seeing the gif browse images. I looked at all the 
ascii files (.lbl, .txt, .tab,.cat, etc) and they seem to be in order 
and provide very useful information (I learned some things about the 
WHT from insthost.cat).


Calib: calinfo.txt the .lbl files have all the necessary entries to 
understand the flat-field image files. Was very happy to see PDF files 
included showing the filter curves, although some of the .ps files 
would crash the Red Hat Linus "Konqueror". This may be a problem with 
my machine, and I can access all the .pdf equivalents.

Let me know if there is something I should do and I will finish this 
review before your deadline. 

Best wishes for the holidays.

-Steve

======================================================

From: Steve Larson [slarson@pirl.lpl.Arizona.EDU]
Sent: Monday, December 29, 2003 9:43 AM
To: mgordon@mail.arc.nasa.gov
Cc: slarson@pirlserver.lpl.arizona.edu
Subject: RE: WHT Ring Plane Crossing Archive

Mitch-
 By copying CDROM images to disc, I can access the images from DS9 and 		corrected header problem?
read the headers, but not through IRAF. It is entirely possible that I 
have a corrupted IRAF, and I will be looking into that next week. In 
principle, I still think that one should be able to access the data 
directly from the CDROM rather than to have to copy them to disc 
first. 

For now, I can say that looking at about 40 images in the ering 
and mainring/ rawimages, I did not note one problem (Gawd those WHT 
headers are long - a clear challenge to the HST headers ;-) I think 
the WHT disc is ready for prime time.

I will be out of email contact for the next three days, but let me 
know if you need more on this.

Happy New Year!

-Steve