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          <mask elevation="10 degrees"
                obs_expected="26428"
                obs_have="22038"
                obs_ratio="83.39" />
          <mask elevation="15 degrees"
                obs_expected="22190"
                obs_have="19469"
                obs_ratio="87.74" />
        </observations>
      </control>
    </file>
  </station>
</QC>
