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      <control date="Sun Apr 17 00:34:31 2011"
               level="3">
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                         size="3831788"
                         time_creation="Sun Apr 17 00:34:18 2011"
                         time_modification="Thu Sep 4 01:08:33 2008" />
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                      epochs_ratio="100.00">
          <mask elevation="03 degrees"
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          <mask elevation="15 degrees"
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  </station>
</QC>
