From pgf@space.mit.edu Wed Aug  4 19:16:35 1993
From: pgf@space.mit.edu (Peter G. Ford)
Newsgroups: sci.astro
Subject: Re: Need Help With CD-ROM Images on explorer.a
Date: 4 Aug 1993 20:04:43 GMT
Organization: MIT Center for Space Research
Distribution: world
Reply-To: pgf@space.mit.edu
NNTP-Posting-Host: mgn1.mit.edu

In article a0s@agate.berkeley.edu, peterme@ocf.berkeley.edu (Peter Merholz) writes:
>The images on the ftp site explorer.arc.nasa.gov are in a format I've
>yet to come across. I'm using a color Mac, and have Photoshop, which can
>read most anything. Anyway, is there some way I can convert those images
>to Mac-readable ones? Those images have high potential--I'd really like
>to see them.

You're correct in saying that many of these images cannot be loaded
into Photoshop.  They can however be read by NASA's version of the NIH
Image program which you can download from the following anonymous ftp
servers:

delcano.mit.edu       18.75.0.80     pub/image1492.hqx
starhawk.jpl.nasa.gov 137.79.108.113 pub/image149.2.hqx

The images on Voyager disks are in a special compressed format. You
must first decompress them with the following program:

delcano.mit.edu       18.75.0.80     pub/PDS.Decompress-1.0.hqx
ames.arc.nasa.gov     128.102.18.3   pub/SPACE/SOFTWARE/PDS.Decompress-1.0.hqx

Once you have loaded the images into Image, you can transfer them to
Photoshop either via the clipboard or by saving them in TIFF format.

Peter Ford
NASA Planetary Data System
Geoscience Node


From martin@helios Thu Aug  5 09:57:50 1993
Newsgroups: sci.astro
From: martin@helios (Martin Connors)
Subject: Re: Need Help With CD-ROM Images on explorer.arc.nasa.gov
Nntp-Posting-Host: helios.space.ualberta.ca
Organization: University Of Alberta, Edmonton Canada
X-Newsreader: TIN [version 1.2 PL1]
Date: Thu, 5 Aug 1993 03:12:24 GMT

Peter Merholz (peterme@ocf.berkeley.edu) wrote:
: The images on the ftp site explorer.arc.nasa.gov are in a format I've
: yet to come across. I'm using a color Mac, and have Photoshop, which can
: read most anything. Anyway, is there some way I can convert those images
: to Mac-readable ones? Those images have high potential--I'd really like
: to see them.

I have posted to Peter the suggestion that he is having trouble due to
the compressed images on many of these CD-ROMs. Now I have my own
question, re the Viking frame number system.
I would like to make a picture of Ceraunius Tholus and it is in frame
516A24 according to a research article from 1982. However the index list
for vo_1008 does not contain this designation. Some other frames in the
article ARE there (341S08) but most are not. How do the frame numbers
relate to CD-ROM filenames?
BTW check out 3rd page of May 1993 National Geographic for a great
image of this area with bried text about SNC (Mars-derived) meteorites.
--
Martin Connors         |
Space Research         | martin@space.ualberta.ca  (403) 492-2526
University of Alberta  |