Sample data line (all on one line):

WXT-1.0,20090831,123500,Dn=091D,Dm=098D,Dx=107D,Sn=7.4N,Sm=8.2N,Sx=9.3N,
  Ta=28.9C,Tp=29.0C,Ua=67.9P,Pa=1014.5H,Rc=42.86M,Rd=43810s,Ri=0.0M,
  Hc=0.0M,Hd=40s,Hi=0.0M,PT=34.1C,BV=13.04V

Field Definitions:
  Format identifier, "WXT-1.0"
  Date as YYYYMMDD
  Time as HHMMSS
  Dn = Wind Direction, min, degrees (D)
  Dm = Wind Direction, average, degrees (D)
  Dx = Wind Direction, max, degrees (D)
  Sn = Wind Speed, min, knots (N)
  Sm = Wind Speed, average, knots (N)
  Sx = Wind Speed, max, knots (N)
  Ta = Air Temperature, C (C)
  Tp = Internal Temperature, C (C)
  Ua = Relative Humidity, %RH (P)
  Pa = Air Pressure, hPa (H)
  Rc = Rain Accumulation, mm (M)
  Rd = Raid Duration, seconds (s)
  Ri = Rain Intensity, mm/h (M)
  Hc = Hail Accumulation, hits/cm^2 (M)
  Hd = Hail Duration, seconds (s)
  Hi = Hail Intensity, hits/cm^2*hour (M)
  PT = Panel Temperature (CR1000), C (C)
  BV = Battery Voltage, volts (V)