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      <control date="Sat Jul 28 08:26:42 2012"
               level="3">
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                         size="8524096"
                         time_creation="Thu Jul 26 00:57:59 2012"
                         time_modification="Fri Jun 29 00:08:57 2012" />
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                      epochs_ratio="100.00">
          <mask elevation="03 degrees"
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          <mask elevation="15 degrees"
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                obs_ratio="100.00" />
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  </station>
</QC>
