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        <observations epoch_first="Thu Jun 17 23:00:00 2010"
                      epoch_last="Thu Jun 17 23:59:59 2010"
                      epochs="3573"
                      epochs_ratio="99.25">
          <mask elevation="03 degrees"
                obs_expected="42348"
                obs_have="39709"
                obs_ratio="93.77" />
          <mask elevation="10 degrees"
                obs_expected="33686"
                obs_have="33429"
                obs_ratio="99.24" />
          <mask elevation="15 degrees"
                obs_expected="30131"
                obs_have="29895"
                obs_ratio="99.22" />
        </observations>
      </control>
    </file>
  </station>
</QC>
