==== Case B2: Rayleigh scattering and molecular absorption ====

This test checks whether molecular absorption is correct. The setup is the same as for case B1 but with molecular absorption and at a different wavelength.

//Setup://

  * model atmosphere with 30 layers, scattering optical thicknesses provided in {{:intercomparisons:phase_b:tau_rayleigh_325.dat|}}, absorption optical thickness in {{:intercomparisons:phase_b:tau_molabs_325.dat|}} 
  * wavelength: 325 nm 
  * Rayleigh depolarization factor: 0.03
  * surface albedo: 0

  * ouput altitudes: 0 km, 1 km, 30 km
  * sun position  (//sza//=60°, //saa//=0°)
  * viewing zenith angles: 
    * at 0 km : //vza//: 0° - 85°, 5° increment
    * at 1 km: //vza//: 0° - 180°, 5° increment (without 90°)
    * at 30 km: //vza//: 95° - 180°, 5° increment 
  * viewing azimuth angle //vaa//: 0° - 180°, 5° increment	     

//Output format://

  * The output should be provided in the same format as for case A1 ([[intercomparisons:a1_rayleigh|Rayleigh scattering]]). 



=== Results ===

//Difference plots// between the models IPOL, 3DMCPOL, SPARTA (previously named TROPOS), SHDOM, PSTAR and MYSTIC for the full radiation field:\\
{{:intercomparisons:phase_b:b2:diff_b2_3dmcpol.pdf|3DMCPOL}}\\
{{:intercomparisons:phase_b:b2:diff_b2_ipol.pdf|IPOL}}\\
{{:intercomparisons:phase_b:b2:diff_b2_tropos.pdf|SPARTA}}\\
{{:intercomparisons:phase_b:b2:diff_b2_shdom3.pdf|SHDOM}}\\
{{:intercomparisons:phase_b:b2:diff_b2_pstar.pdf|PSTAR}}\\

//Data// of all models (MYSTIC and 3DMCPOL include also standard deviation):\\
{{:intercomparisons:phase_b:b2:iprt_case_b2_mystic.dat|MYSTIC}}\\	 
{{:intercomparisons:phase_b:b2:iprt_case_b2_3dmcpol.dat|3DMCPOL}}\\
{{:intercomparisons:phase_b:b2:iprt_case_b2_ipol.dat|IPOL}}\\
{{:intercomparisons:phase_b:b2:iprt_case_b2_tropos.dat|SPARTA}}\\
{{:intercomparisons:phase_b:b2:iprt_case_b2_shdom3.dat|SHDOM}}\\
{{:intercomparisons:phase_b:b2:iprt_case_b2_pstar.dat|PSTAR}}\\