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          <mask elevation="10 degrees"
                obs_expected="28141"
                obs_have="22582"
                obs_ratio="80.25" />
          <mask elevation="15 degrees"
                obs_expected="25383"
                obs_have="21373"
                obs_ratio="84.20" />
        </observations>
      </control>
    </file>
  </station>
</QC>
