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          <mask elevation="10 degrees"
                obs_expected="28657"
                obs_have="26779"
                obs_ratio="93.45" />
          <mask elevation="15 degrees"
                obs_expected="25174"
                obs_have="24209"
                obs_ratio="96.17" />
        </observations>
      </control>
    </file>
  </station>
</QC>
