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          <mask elevation="03 degrees"
                obs_expected="28251"
                obs_have="21923"
                obs_ratio="77.60" />
          <mask elevation="10 degrees"
                obs_expected="26914"
                obs_have="21923"
                obs_ratio="81.46" />
          <mask elevation="15 degrees"
                obs_expected="21572"
                obs_have="19575"
                obs_ratio="90.74" />
        </observations>
      </control>
    </file>
  </station>
</QC>
