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          <mask elevation="10 degrees"
                obs_expected="28113"
                obs_have="26032"
                obs_ratio="92.60" />
          <mask elevation="15 degrees"
                obs_expected="22816"
                obs_have="22145"
                obs_ratio="97.06" />
        </observations>
      </control>
    </file>
  </station>
</QC>
