title: 'gunzip' is not recognized as an internal or external command, operable program or batch file. System command 'gunzip' failed
body: <p>I am trying to analyse my raw GNSS data on the GNSS Analyser app from here <a href="https://github.com/google/gps-measurement-tools" rel="nofollow noreferrer">https://github.com/google/gps-measurement-tools</a>. The installation guide includes the following step:</p>
  
  <p>4.2 gunzip installation
  The automatic ftp code inside GnssAnalysis will download ephemeris zip files, and attempt to
  <code>unzip</code> them using <code>gunzip</code>.</p>
  
  <ul>
  <li>Download <code>gzip.exe</code> from here <a href="http://ftp.gnu.org/gnu/gzip/gzip-1.9.zip" rel="nofollow noreferrer">http://ftp.gnu.org/gnu/gzip/gzip-1.9.zip</a></li>
  <li>Extract the files from the <code>zip</code> file, rename <code>gzip.exe</code> to <code>gunzip.exe</code></li>
  <li>Move <code>gunzip.exe</code> to somewhere in your Windows path (type <code>path</code> in the Windows
  Command Prompt to see what your path is, typically you will find a directory
  <code>C:\Windows\system32</code> and you can put <code>gunzip.exe</code> there.)</li>
  </ul>
  
  <p>However, upon downloading <code>gunzip</code>, I cant find a <code>gzip.exe</code> file, and hence tried renaming the <code>gzip.c</code> and <code>gzip.h</code> file instead. It did not work and I got this error when attempting to process my own raw data. </p>