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<section id="gnss-enu2los-csh">
<span id="index-0"></span><h1>gnss_enu2los.csh<a class="headerlink" href="#gnss-enu2los-csh" 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>gnss_enu2los.csh</strong> <em>master.PRM master.LED gnss.sllenu dem.grd</em></p>
</section>
<section id="description">
<h2>Description<a class="headerlink" href="#description" title="Permalink to this headline"></a></h2>
<p><strong>gnss_enu2los.csh</strong> will convert given east/north/up GNSS observations to Line-Of-Sight (LOS)</p>
<p>This can be used in three main ways:</p>
<ol class="arabic simple">
<li><p>Converting a single GPS station time series to LOS (one station for every run)</p></li>
<li><p>Converting a set of displacements over a specific time period observed at many GPS station points</p></li>
<li><p>Converting a set of estimated GPS velocities</p></li>
</ol>
<p>The output of this script can be directly input into another script called <a class="reference internal" href="correct_insar_with_gnss.csh.html"><span class="doc">correct_insar_with_gnss.csh</span></a> which can correct an interferogram (or InSAR velocity field if you have run a time series) with GPS data.</p>
<p>GPS displacement and velocity data can be acquired from many sources. Check out these resources to learn more and find data for your area:</p>
<p><em>Scripps Orbit and Permanent Array Center (SOPAC) and NASA MEaSUREs ESESES time series:</em></p>
<p>Interactive Map and time series viewer: <a class="reference external" href="http://mgviz.ucsd.edu/?mission=ESESES">http://mgviz.ucsd.edu/?mission=ESESES</a></p>
<p>Download time series: <a class="reference external" href="http://sopac-csrc.ucsd.edu/index.php/displacements/">http://sopac-csrc.ucsd.edu/index.php/displacements/</a></p>
<p><em>University of Nevada, Reno, Nevada Geodetic Laboratory (NGL):</em></p>
<p>Interactive Map: <a class="reference external" href="http://geodesy.unr.edu/NGLStationPages/gpsnetmap/GPSNetMap.html">http://geodesy.unr.edu/NGLStationPages/gpsnetmap/GPSNetMap.html</a></p>
<p>Home page: <a class="reference external" href="http://geodesy.unr.edu/index.php">http://geodesy.unr.edu/index.php</a></p>
</section>
<section id="required-arguments">
<h2>Required Arguments<a class="headerlink" href="#required-arguments" title="Permalink to this headline"></a></h2>
<p><em>master.PRM</em></p>
<blockquote>
<div><p>PRM file for the master SAR image</p>
</div></blockquote>
<p><em>master.LED</em></p>
<blockquote>
<div><p>LED file for the master SAR image. Ensure that this is the same .LED file listed in your master.PRM file (they must match)</p>
</div></blockquote>
<p><em>gnss.llenu</em></p>
<blockquote>
<div><p>GNSS displacements. Assumes the gnss.llenu file is a list of stations with a specific displacement value (e.g. the displacement between two insar scenes, or the velocity of a single point) per station in millimeters or millimeters/yr.</p>
<p>Format: StationCode Longitude Latitude East North Up</p>
</div></blockquote>
<p><em>dem.grd</em></p>
<blockquote>
<div><p>DEM grid file from your insar processing</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">gnss_enu2los</span><span class="o">.</span><span class="n">csh</span> <span class="n">master</span><span class="o">.</span><span class="n">PRM</span> <span class="n">master</span><span class="o">.</span><span class="n">LED</span> <span class="n">gnss_2019</span><span class="o">-</span><span class="mf">2018.</span><span class="n">sllenu</span> <span class="n">dem</span><span class="o">.</span><span class="n">grd</span>
</pre></div>
</div>
</div></blockquote>
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