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          <mask elevation="10 degrees"
                obs_expected="27938"
                obs_have="14705"
                obs_ratio="52.63" />
          <mask elevation="15 degrees"
                obs_expected="24817"
                obs_have="12637"
                obs_ratio="50.92" />
        </observations>
      </control>
    </file>
  </station>
</QC>
