text: # Constants file supporting pyPI: Potential Intensity Calculation in Python
  #
  # Last updated 5/14/20
  # 
  
  #
  #   ***  Define constants   ***
  #
  
  # Thermodynamic Constants
  CPD=1005.7       # [J/kg.K] Specific heat of dry air at constant pressure
  CPV=1870.0       # [J/kg.K] Specific heat of water vapor at constant pressure
  #CL=4190.0       # [J/kg.K] Specific heat of liquid water
  CL=2500.0        # [J/kg.K] Modified specific heat of liquid water
  CPVMCL=CPV-CL
  RV=461.5         # [J/kg.K] gas constant of water vapor
  RD=287.04        # [J/kg.K] gas constant of dry air
  EPS=RD/RV        # [unitless] epsilon, the ratio of gas constants
  ALV0=2.501e6     # [J/kg] latent heat of vaporization at 0 degrees C
  
  # pLCL Empirical Parameters
  A=1669.0
  B=122.0
  
  # PI Auxiliaries
  b=2.0        # Exponent for estimating azimuthal velocity in the eye, V=V_m(r/r_m)**b (Emanuel 1995, EQN. 25)
  ptop=50      # Pressure below which sounding is ignored (hPa)