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        <observations epoch_first="Wed Jun 23 23:00:00 2010"
                      epoch_last="Wed Jun 23 23:59:59 2010"
                      epochs="3566"
                      epochs_ratio="99.06">
          <mask elevation="03 degrees"
                obs_expected="43388"
                obs_have="36179"
                obs_ratio="83.38" />
          <mask elevation="10 degrees"
                obs_expected="31376"
                obs_have="29970"
                obs_ratio="95.52" />
          <mask elevation="15 degrees"
                obs_expected="26440"
                obs_have="26186"
                obs_ratio="99.04" />
        </observations>
      </control>
    </file>
  </station>
</QC>
