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        <observations epoch_first="Tue Jun 22 23:00:00 2010"
                      epoch_last="Tue Jun 22 23:59:59 2010"
                      epochs="3578"
                      epochs_ratio="99.39">
          <mask elevation="03 degrees"
                obs_expected="42812"
                obs_have="36898"
                obs_ratio="86.19" />
          <mask elevation="10 degrees"
                obs_expected="31588"
                obs_have="30298"
                obs_ratio="95.92" />
          <mask elevation="15 degrees"
                obs_expected="27110"
                obs_have="26936"
                obs_ratio="99.36" />
        </observations>
      </control>
    </file>
  </station>
</QC>
