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        <observations epoch_first="Sun Aug 19 23:00:00 2007"
                      epoch_last="Sun Aug 19 23:59:59 2007"
                      epochs="3600"
                      epochs_ratio="100.00">
          <mask elevation="03 degrees"
                obs_expected="31281"
                obs_have="28474"
                obs_ratio="91.03" />
          <mask elevation="10 degrees"
                obs_expected="24163"
                obs_have="24154"
                obs_ratio="99.96" />
          <mask elevation="15 degrees"
                obs_expected="20798"
                obs_have="20798"
                obs_ratio="100.00" />
        </observations>
      </control>
    </file>
  </station>
</QC>
