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<section id="ers-pre-process">
<span id="index-0"></span><h1>ERS_pre_process<a class="headerlink" href="#ers-pre-process" title="Permalink to this headline"></a></h1>
<section id="synopsis">
<h2>Synopsis<a class="headerlink" href="#synopsis" title="Permalink to this headline"></a></h2>
<p><strong>ERS_pre_process</strong> <em><name_stem></em> <em><near_range></em> <em><earth_radius></em> <em><num_patches></em> <em>[Doppler]</em></p>
</section>
<section id="description">
<h2>Description<a class="headerlink" href="#description" title="Permalink to this headline"></a></h2>
<p><strong>ERS_pre_process</strong> will digest ERS SAR data</p>
</section>
<section id="required-arguments">
<h2>Required Arguments<a class="headerlink" href="#required-arguments" title="Permalink to this headline"></a></h2>
<p><em>name_stem</em></p>
<blockquote>
<div><p>Filename of the .dat and .ldr file</p>
</div></blockquote>
<p><em>near_range</em></p>
<blockquote>
<div><p>Near range (in meters) of the SAR image (put 0 if use default value)</p>
</div></blockquote>
<p><em>earth_radius</em></p>
<blockquote>
<div><p>Local earth radius (in meters) (put 0 if use default value)</p>
</div></blockquote>
<p><em>num_patch</em></p>
<blockquote>
<div><p>Number of patches (put 0 if use default value)</p>
</div></blockquote>
</section>
<section id="optional-arguments">
<h2>Optional Arguments<a class="headerlink" href="#optional-arguments" title="Permalink to this headline"></a></h2>
<p><em>Doppler</em></p>
<blockquote>
<div><p>Doppler value (blank if use default value)</p>
</div></blockquote>
</section>
<section id="example">
<h2>Example<a class="headerlink" href="#example" title="Permalink to this headline"></a></h2>
<blockquote>
<div><div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">ERS_pre_process</span> <span class="n">ERS_pre_process</span> <span class="n">ERS2_356_2925_61332</span> <span class="mf">978992.922</span> <span class="mi">6378000</span> <span class="mi">5</span>
</pre></div>
</div>
</div></blockquote>
<p>This command will preprocess ERS2 SAR data ‘ERS2_356_2925_61332’
then output parameter file ‘ERS2_356_2925_61332.PRM’ and fixed raw data
file ‘ERS2_356_2925_61332.raw’ and LED file ERS2_356_2925_61332.LED
with near range close to 978992.922 meters and earth radius 6378000 meters and 5 patches</p>
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