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        <observations epoch_first="Wed Jun 23 23:00:00 2010"
                      epoch_last="Wed Jun 23 23:59:59 2010"
                      epochs="3568"
                      epochs_ratio="99.11">
          <mask elevation="03 degrees"
                obs_expected="40881"
                obs_have="35065"
                obs_ratio="85.77" />
          <mask elevation="10 degrees"
                obs_expected="34111"
                obs_have="31584"
                obs_ratio="92.59" />
          <mask elevation="15 degrees"
                obs_expected="26861"
                obs_have="26610"
                obs_ratio="99.07" />
        </observations>
      </control>
    </file>
  </station>
</QC>
