Frank's format, as used for AR84-03
for the example of the OS150 data. The OS38 and WH300 data have the same variables.


>> load ar8403a_os150nb_dt.mat
>> whos
  Name                 Size      

  txy               3601x3        time in 2024 decimal days (see note below), lon, lat in decimal degrees
  u                 3601x45       zonal detided velocity
  v                 3601x45       meridional detided velocity
  depth                1x45       bin center depth
  tide_txyuvz       3601x6        from tidal model: time, lon, lat, zonal tides, merid. tides, depth 
  u_notdetided      3601x45       zonal velocity, tides not removed
  v_notdetided      3601x45       meridonal velocity, tides not removed
  
  amp               3601x45       backscatter amplitude, manufacturer's units
  pgood             3601x45       percent_good: the number of good returns in an ensemble average, expressed in percent

  refyear              1x1         decimal day reference year; 2024 here
  spd_u                1x3601      zonal ship speed 
  spd_v                1x3601      meridional ship speed
  readme              44x60        a text variable describing the format
  

 All velocity in meter/second;
 depths in meter;
 time in UTC, using decimal days as format. Decimal days are a zero-based year counter,
    so noon on January 1 is day 0.5, not 1.5
    For 2024, Sept 13 is decimal day 256.