code: def water_temp_prob(self):
          
          temp_const = 4.0  # degrees C
          water_temp = self.temp_water()
          return (water_temp - self.tirs1) / temp_const
docs: Temperature probability for water
          Equation 9 (Zhu and Woodcock, 2012)
          Parameters
          ----------
          water_temp: float
              82.5th percentile temperature over water
          swir2: ndarray
          tirs1: ndarray
          Output
          ------
          ndarray:
              probability of cloud over water based on temperature