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        <observations epoch_first="Tue Jan 23 23:00:00 2007"
                      epoch_last="Tue Jan 23 23:59:59 2007"
                      epochs="3580"
                      epochs_ratio="99.44">
          <mask elevation="03 degrees"
                obs_expected="32394"
                obs_have="31300"
                obs_ratio="96.62" />
          <mask elevation="10 degrees"
                obs_expected="28110"
                obs_have="27956"
                obs_ratio="99.45" />
          <mask elevation="15 degrees"
                obs_expected="24653"
                obs_have="24515"
                obs_ratio="99.44" />
        </observations>
      </control>
    </file>
  </station>
</QC>
