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          <mask elevation="10 degrees"
                obs_expected="29392"
                obs_have="16427"
                obs_ratio="55.89" />
          <mask elevation="15 degrees"
                obs_expected="24334"
                obs_have="13486"
                obs_ratio="55.42" />
        </observations>
      </control>
    </file>
  </station>
</QC>
