==== Case A2: Rayleigh atmosphere with Lambertian surface ==== 

//Setup://
  * similar to case A1, with small modifications
  * surface albedo: 0.3
  * optical thickness: 0.1
  * Rayleigh depolarization factor: 0.03
  * transmittance at bottom and reflectance at top of layer	
  * solar zenith angle //sza//: 50°
  * solar azimuth angle //saa//: 0°
  * viewing zenith angles 
    * at bottom: //vza//: 0° - 80°, 5° increment
    * at top:    //vza//: 100° - 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_a:a2:diff_a2_3dmcpol.pdf|3DMCPOL}}\\
{{:intercomparisons:phase_a:a2:diff_a2_ipol.pdf|IPOL}}\\
{{:intercomparisons:phase_a:a2:diff_a2_tropos.pdf|SPARTA}}\\
{{:intercomparisons:phase_a:a2:diff_a2_shdom3.pdf|SHDOM}}\\
{{:intercomparisons:phase_a:a2:diff_a2_pstar.pdf|PSTAR}}\\

//Data// of all models (MYSTIC and 3DMCPOL include also standard deviation):\\
{{:intercomparisons:phase_a:a2:iprt_case_a2_mystic.dat|MYSTIC}}\\	 
{{:intercomparisons:phase_a:a2:iprt_case_a2_3dmcpol.dat|3DMCPOL}}\\
{{:intercomparisons:phase_a:a2:iprt_case_a2_ipol.dat|IPOL}}\\
{{:intercomparisons:phase_a:a2:iprt_case_a2_tropos.dat|SPARTA}}\\
{{:intercomparisons:phase_a:a2:iprt_case_a2_shdom3.dat|SHDOM}}\\
{{:intercomparisons:phase_a:a2:iprt_case_a2_pstar.dat|PSTAR}}\\