Xref: utzoo comp.graphics:16972 rec.photo:19661
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!swrinde!cs.utexas.edu!asuvax!noao!stsci!levay
From: levay@stsci.EDU (Zoltan Levay)
Newsgroups: comp.graphics,rec.photo
Subject: Re: Digital Photography
Summary: HST
Message-ID: <2426@ra.stsci.edu>
Date: 1 Apr 91 21:56:40 GMT
References: <1991Mar22.234502.4783@ux1.cso.uiuc.edu> <50815@apple.Apple.COM> <1991Apr01.182950.14843@ima.isc.com>
Organization: Space Telescope Science Institute, Baltimore, MD 21218
Lines: 19

In article <1991Apr01.182950.14843@ima.isc.com>, suitti@ima.isc.com (Stephen Uitti) writes:
> Let's say that the CCD in the camera can be arbitrarily large.
> The Hubble Space Telescope is said to have an 8Kx8K CCD.  Note
> that 35 mm has an aspect ratio of about 3:2, rather than 1:1.

The WF/PC (CCD cameras) on the Hubble Space Telescope uses four 800x800
pixel CCD chips in a two-by-two array, resulting in a mosaic of
1600x1600 pixels.  (Remember that this is relatively old
technology--the original launch dates were early 1980s.)  Each pixel in
the resulting images has a depth of 16 bits (two bytes) so we're
talking ~1.22MB per chip.  A given exposure is monochrome, but there
are filters aboard that allow fields to be exposed in different colors
and multi-color images to be constructed.

-- 

Zolt

                             "f/8 and be there!"  Bill Garrett