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<h3><img alt="" src="../sun.gif" align="middle" height="98"
width="100"> SAOImage DS9 Reference Manual</h3>
<blockquote>
<p>DS9 is the next version of the popular <a
href="http://hea-www.harvard.edu/RD/saotng/">SAOtng</a>
display program. It is a Tk/Tcl application which utilizes the
SAOtk widget set. It also incorporates the new X Public Access (<a
href="http://hea-www.harvard.edu/RD/xpa/">XPA</a>) mechanism
to allow external processes to access and control its data, GUI
functions, and algorithms. DS9 supports the direct display
of FITS images and binary tables, multiple frame buffers, region
cursor manipulation, many scale algorithms and colormaps, and
easy communication with external analysis tasks. It is highly
configurable and extensible to meet the evolving needs of the
astronomical community. </p>
<p>DS9 supports advanced features such as multiple frame buffers,
mosaic images, tiling, blinking, geometric markers, colormap
manipulation, scaling, arbitrary zoom, rotation, pan, and a
variety of coordinate systems (including Image, Physical,
Detector, and WCS). DS9 also supports FTP and HTTP access. The
GUI for DS9 is user configurable.</p>
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<td align="center" valign="middle"> <a href="how.html">How
It Works</a></td>
<td align="center" valign="top"><a href="backup.html">Backup
and Restore</a></td>
<td align="center" valign="middle"> <a href="file.html">File
Formats</a></td>
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<tr>
<td align="center" valign="middle"> <a href="keyboard.html">Mouse
and Keyboard</a> </td>
<td align="center" valign="top"><a href="grid.html">Coordinate
Grids</a></td>
<td align="center" valign="middle"> <a href="prefs.html">Preferences</a></td>
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<td align="center" valign="middle"> <a href="command.html">Command
Line Options</a> </td>
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<td align="center" valign="middle"> <a href="3d.html">3-D
Frames</a></td>
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<td align="center" valign="middle"> <a href="xpa.html">XPA
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