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                obs_ratio="100.00" />
        </observations>
      </control>
      <control date="Sat Oct 31 03:07:31 2020"
               level="3">
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                         size="9509621"
                         time_creation="Wed Oct 28 01:51:27 2020"
                         time_modification="Fri Oct  2 00:48:46 2020" />
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                      epochs_ratio="100.00">
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          <mask elevation="15 degrees"
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                obs_have="24100"
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  </station>
</QC>
