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<div class="section" id="biasbat-command">
<span id="index-0"></span><span id="id1"></span><h1>biasbat (command)<a class="headerlink" href="#biasbat-command" title="Permalink to this headline">¶</a></h1>
<p>utility for bias correction</p>
<div class="section" id="synopsis">
<h2>Synopsis<a class="headerlink" href="#synopsis" title="Permalink to this headline">¶</a></h2>
<p>biasbat [ options ] <em>bias-file</em> <em>input-files</em> ...</p>
</div>
<div class="section" id="description">
<h2>Description<a class="headerlink" href="#description" title="Permalink to this headline">¶</a></h2>
<p>The <strong class="command">biasbat</strong> command applies bias correction to a set of source frames.
The bias correction is applied in advanced calibration scheme only, please refer to documentation about
the calibration of CCD frames.</p>
<p>The source frames and the bias frame must be in the FITS format and of same dimensions. The output
file is written in the FITS format too.</p>
</div>
<div class="section" id="input-files">
<span id="biasbat-input-files"></span><h2>Input files<a class="headerlink" href="#input-files" title="Permalink to this headline">¶</a></h2>
<p>Names of input files can be specified directly on a command-line as command arguments; it is allowed to use the
usual wild-card notation. In case the input files are placed outside the working directory, you have to specify
the proper path relative to the current working directory.</p>
<p>Alternatively, you can also prepare a list of input file names in a text file, each input file on a separate line.
It is not allowed to use the wild-card notation here. Use the -i option to instruct the program to read the file.</p>
</div>
<div class="section" id="output-files">
<span id="biasbat-output-files"></span><h2>Output files<a class="headerlink" href="#output-files" title="Permalink to this headline">¶</a></h2>
<p>By default, output files are stored to the current working directory. Their names
are derived from the command name followed by a sequential number starting by 1.
Command options allows a caller to modify the default naming of output files.</p>
<p>The -o option sets the format string; it may contain a path where
the files shall be stored to. Special meaning has a sequence of question marks, it
is replaced by the ordinal number of a file indented by leading zeros to the same
number of decimal places as the number of the question marks.</p>
<p>By means of the -i option, you can modify the initial value of a counter.</p>
<p>On request, the program can write a list of output files to a text file, use the -g option
to specify a file name.</p>
</div>
<div class="section" id="options">
<h2>Options<a class="headerlink" href="#options" title="Permalink to this headline">¶</a></h2>
<p>Options are used to provide extra information to customize the execution of a command. They are specified as command
arguments.</p>
<p>Each option has a full form starting with two dashes and an optional short form starting with one dash only. Options
are case-sensitive. It is allowed to merge two or more successive short options together. Some options require a value;
in this case a value is taken from a subsequent argument. When a full form is used, an option and its value can also
be separated by an equal sign. When a short form is used, its value can immediately follow the option.</p>
<p>Whenever there is a conflict between a configuration file parameter and an option of the same meaning, the option
always take precedence.</p>
<dl class="option">
<dt id="cmdoption-biasbat-i">
<tt class="descname">-i</tt><tt class="descclassname"></tt><tt class="descclassname">, </tt><tt class="descname">--read-dirfile</tt><tt class="descclassname"> <filepath></tt><a class="headerlink" href="#cmdoption-biasbat-i" title="Permalink to this definition">¶</a></dt>
<dd><p>read list of input files from specified file; see the <a class="reference internal" href="#biasbat-input-files"><em>Input files</em></a> section for details.</p>
</dd></dl>
<dl class="option">
<dt id="cmdoption-biasbat-g">
<tt class="descname">-g</tt><tt class="descclassname"></tt><tt class="descclassname">, </tt><tt class="descname">--make-dirfile</tt><tt class="descclassname"> <filepath></tt><a class="headerlink" href="#cmdoption-biasbat-g" title="Permalink to this definition">¶</a></dt>
<dd><p>save list of output files to specified file, existing content of the file will be overwritten;
see the <a class="reference internal" href="#biasbat-output-files"><em>Output files</em></a> section for details.</p>
</dd></dl>
<dl class="option">
<dt id="cmdoption-biasbat-o">
<tt class="descname">-o</tt><tt class="descclassname"></tt><tt class="descclassname">, </tt><tt class="descname">--output-mask</tt><tt class="descclassname"> <mask></tt><a class="headerlink" href="#cmdoption-biasbat-o" title="Permalink to this definition">¶</a></dt>
<dd><p>set output file mask (default=:file:<cite>bout????.fts</cite>), see the <a class="reference internal" href="#biasbat-output-files"><em>Output files</em></a> section for details.</p>
</dd></dl>
<dl class="option">
<dt id="cmdoption-biasbat-c">
<tt class="descname">-c</tt><tt class="descclassname"></tt><tt class="descclassname">, </tt><tt class="descname">--counter</tt><tt class="descclassname"> <value></tt><a class="headerlink" href="#cmdoption-biasbat-c" title="Permalink to this definition">¶</a></dt>
<dd><p>set initial counter value (default=1), see the <a class="reference internal" href="#biasbat-output-files"><em>Output files</em></a> section for details.</p>
</dd></dl>
<dl class="option">
<dt id="cmdoption-biasbat-h">
<tt class="descname">-h</tt><tt class="descclassname"></tt><tt class="descclassname">, </tt><tt class="descname">--help</tt><tt class="descclassname"></tt><a class="headerlink" href="#cmdoption-biasbat-h" title="Permalink to this definition">¶</a></dt>
<dd><p>print list of command-line parameters</p>
</dd></dl>
<dl class="option">
<dt id="cmdoption-biasbat-q">
<tt class="descname">-q</tt><tt class="descclassname"></tt><tt class="descclassname">, </tt><tt class="descname">--quiet</tt><tt class="descclassname"></tt><a class="headerlink" href="#cmdoption-biasbat-q" title="Permalink to this definition">¶</a></dt>
<dd><p>quiet mode; suppress all messages</p>
</dd></dl>
<dl class="option">
<dt id="cmdoption-biasbat--version">
<tt class="descname">--version</tt><tt class="descclassname"></tt><a class="headerlink" href="#cmdoption-biasbat--version" title="Permalink to this definition">¶</a></dt>
<dd><p>print software version string</p>
</dd></dl>
<dl class="option">
<dt id="cmdoption-biasbat--licence">
<tt class="descname">--licence</tt><tt class="descclassname"></tt><a class="headerlink" href="#cmdoption-biasbat--licence" title="Permalink to this definition">¶</a></dt>
<dd><p>print software licence</p>
</dd></dl>
<dl class="option">
<dt id="cmdoption-biasbat--verbose">
<tt class="descname">--verbose</tt><tt class="descclassname"></tt><a class="headerlink" href="#cmdoption-biasbat--verbose" title="Permalink to this definition">¶</a></dt>
<dd><p>verbose mode; print debug messages</p>
</dd></dl>
</div>
<div class="section" id="examples">
<h2>Examples<a class="headerlink" href="#examples" title="Permalink to this headline">¶</a></h2>
<div class="highlight-python"><pre>biasbat -oout.fts bias.fts in.fts</pre>
</div>
<p>The command applies the bias correction to the input file <tt class="file docutils literal"><span class="pre">in.fts</span></tt> using
the file <tt class="file docutils literal"><span class="pre">bias.fts</span></tt> as a correction frame. The output is written to the output
file <tt class="file docutils literal"><span class="pre">out.fts</span></tt>.</p>
</div>
<div class="section" id="exit-status">
<h2>Exit status<a class="headerlink" href="#exit-status" title="Permalink to this headline">¶</a></h2>
<p>The command returns a zero exit status if it succeeds to process all specified files. Otherwise, it will stop
immediately when an error occurs and a nonzero error code is returned.</p>
</div>
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<h3><a href="index.html">Table Of Contents</a></h3>
<ul>
<li><a class="reference internal" href="#">biasbat (command)</a><ul>
<li><a class="reference internal" href="#synopsis">Synopsis</a></li>
<li><a class="reference internal" href="#description">Description</a></li>
<li><a class="reference internal" href="#input-files">Input files</a></li>
<li><a class="reference internal" href="#output-files">Output files</a></li>
<li><a class="reference internal" href="#options">Options</a></li>
<li><a class="reference internal" href="#examples">Examples</a></li>
<li><a class="reference internal" href="#exit-status">Exit status</a></li>
</ul>
</li>
</ul>
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