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          <mask elevation="10 degrees"
                obs_expected="29688"
                obs_have="24098"
                obs_ratio="81.17" />
          <mask elevation="15 degrees"
                obs_expected="23453"
                obs_have="19289"
                obs_ratio="82.25" />
        </observations>
      </control>
    </file>
  </station>
</QC>
