From: SMTP%"nicholso@astrosun.tn.cornell.edu" 30-SEP-1999 09:08:45.11 To: SHOWALTER CC: Subj: Re: RPX review comments Message-Id: <199909301603.MAA22299@bilbo.tn.cornell.edu> Date: Thu, 30 Sep 1999 12:03:35 -0400 (EDT) From: Phil Nicholson Reply-To: Phil Nicholson Subject: Re: RPX review comments To: SHOWALTER@ringside.arc.nasa.gov MIME-Version: 1.0 Content-Type: TEXT/plain; charset=us-ascii Content-MD5: JA/N5PGtUnPZKg7HVm/VCQ== X-Mailer: dtmail 1.3.0 CDE Version 1.3 SunOS 5.7 sun4u sparc Mark: After reading the other reports, perhaps I should add some additional comments. File formats: I looked at the CD-ROMs using a Sparc Ultra-1 running Solaris. I was able to display the GIF files from the browse directories directly with Sun's image viewer (ie, I just double-clicked on the icons in the File Manager window). However, SOLARIS did not recognise the .TXT files as text (it tried to run them...) so I looked at them with the UNIX 'more' command instead. I have not so far examined the pdf or ps files. I did unzip one of the label files using my local version of 'unzip', after copying the file to disk. FITS images: Since others used IRAF, I should report that I was able to read the FITS image files in IDL 5.1 using the 'readfits' command, directly from the disk and with no problems. I carefully compared several specific images from our own Aug and Nov data sets against my own copies of these images, just to see that everything was labelled correctly. All checked out OK. I even found some images I had forgotten were taken, so the set seems to be very complete. GIF images: I think the fact that you have reassembled all 4 images from each original HST files with their correct orientation and scale in the GIF images is a good thing. I found a sketch of the WFPC2 layout in one of the documentation files. Otherwise the 90 deg rotations of the individual PC or WF images could be very confusing. Perhaps you could note somewhere (in the volume description?) that the orientation on the sky of the HST FOV switches 180 deg at opposition, so the May and Aug images are oppositely oriented to the Nov images. (This is implicit in the CLOCK_ANGLE values, of course.) -- phil.