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                obs_ratio="100.00" />
        </observations>
      </control>
      <control date="Sun Apr 28 06:06:18 2019"
               level="3">
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                         size="7649527"
                         time_creation="Thu Apr 25 06:41:16 2019"
                         time_modification="Sat Mar 30 00:12:13 2019" />
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                      epochs_ratio="100.00">
          <mask elevation="03 degrees"
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                obs_have="37485"
                obs_ratio="89.60" />
          <mask elevation="10 degrees"
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          <mask elevation="15 degrees"
                obs_expected="35501"
                obs_have="35501"
                obs_ratio="100.00" />
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  </station>
</QC>
