def dbuv_to_dmw_per_sq_m(dbuv):
  """
  Convert dB(uV) to dB(mW/m^2)

  from http://www.ahsystems.com/notes/RFconversions.php:
  dBmW/m2 = dBmV/m - 115.8

  @param dbuv : dB(uV)
  @type  dbuv : float

  @return: dBm/m^2 as float
  """
  return dbuv - 115.8