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          <mask elevation="10 degrees"
                obs_expected="34750"
                obs_have="29580"
                obs_ratio="85.12" />
          <mask elevation="15 degrees"
                obs_expected="29979"
                obs_have="27532"
                obs_ratio="91.84" />
        </observations>
      </control>
    </file>
  </station>
</QC>
