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               level="3">
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                         size="5112958"
                         time_creation="Sun Sep  1 01:53:31 2019"
                         time_modification="Tue Aug  6 00:08:49 2019" />
        <observations epoch_first="Mon Aug  5 23:00:00 2019"
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                      epochs="3600"
                      epochs_ratio="100.00">
          <mask elevation="03 degrees"
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          <mask elevation="10 degrees"
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          <mask elevation="15 degrees"
                obs_expected="19567"
                obs_have="19567"
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</QC>
