dbname:             ../adcpdb/a_ex
           output:             a_ex
           step_size:          1
           ndepth:             20
           time_ranges:        separate
           year_base=          2017

           option_list:
             pg_min=           50
           navigation:
             reference_bins  2  to   20
             end
           statistics:       mean
             units=          0.01       /* cm/s instead of default m/s */
             end
           flag_mask:        ALL_BITS
             end
           end
          2017/02/17  17:14:09 to 2017/02/18  03:34:10                 /* the whole time range */