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        <observations epoch_first="Sat Feb 24 23:00:00 2007"
                      epoch_last="Sat Feb 24 23:59:59 2007"
                      epochs="3574"
                      epochs_ratio="99.28">
          <mask elevation="03 degrees"
                obs_expected="33624"
                obs_have="31083"
                obs_ratio="92.44" />
          <mask elevation="10 degrees"
                obs_expected="26747"
                obs_have="26569"
                obs_ratio="99.33" />
          <mask elevation="15 degrees"
                obs_expected="23348"
                obs_have="23179"
                obs_ratio="99.28" />
        </observations>
      </control>
    </file>
  </station>
</QC>
