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      </control>
      <control date="Mon Mar  7 05:04:37 2011"
               level="3">
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                         size="9120351"
                         time_creation="Sat Mar  5 00:55:35 2011"
                         time_modification="Sun Feb  6 00:11:37 2011" />
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                      epochs_ratio="99.75">
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          <mask elevation="10 degrees"
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</QC>
