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        <observations epoch_first="Tue Jun 22 23:00:00 2010"
                      epoch_last="Tue Jun 22 23:59:59 2010"
                      epochs="3556"
                      epochs_ratio="98.78">
          <mask elevation="03 degrees"
                obs_expected="40426"
                obs_have="35111"
                obs_ratio="86.85" />
          <mask elevation="10 degrees"
                obs_expected="34548"
                obs_have="31938"
                obs_ratio="92.45" />
          <mask elevation="15 degrees"
                obs_expected="27540"
                obs_have="27182"
                obs_ratio="98.70" />
        </observations>
      </control>
    </file>
  </station>
</QC>
