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          <mask elevation="10 degrees"
                obs_expected="29494"
                obs_have="29120"
                obs_ratio="98.73" />
          <mask elevation="15 degrees"
                obs_expected="25850"
                obs_have="25602"
                obs_ratio="99.04" />
        </observations>
      </control>
    </file>
  </station>
</QC>
