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          <mask elevation="10 degrees"
                obs_expected="34903"
                obs_have="33617"
                obs_ratio="96.32" />
          <mask elevation="15 degrees"
                obs_expected="33426"
                obs_have="32991"
                obs_ratio="98.70" />
        </observations>
      </control>
    </file>
  </station>
</QC>
