troll data format:

YYYY/MM/DD HH:MM +TT.TTT +PP.PPP +O.OOO +B.BBB

where YYY/MM/DD = date
      HH:MM     = time
      +TT.TTT   = temperature, C
      +PP.PPP   = pressure, psi
      +O.OOO    = dissolved oxygen, mg/L
      +B.BBB    = battery voltage, volts