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        <observations epoch_first="Mon Jun 21 23:00:00 2010"
                      epoch_last="Mon Jun 21 23:59:59 2010"
                      epochs="3558"
                      epochs_ratio="98.83">
          <mask elevation="03 degrees"
                obs_expected="40876"
                obs_have="39029"
                obs_ratio="95.48" />
          <mask elevation="10 degrees"
                obs_expected="34867"
                obs_have="34440"
                obs_ratio="98.78" />
          <mask elevation="15 degrees"
                obs_expected="27822"
                obs_have="27471"
                obs_ratio="98.74" />
        </observations>
      </control>
    </file>
  </station>
</QC>
