==== Case D3: Aerosol layer (spherical) ====

This case includes the same setup as case D1 but including spherical aerosol particles, the same as in case A3.

//Setup://

  * typical water soluble aerosol for 50% relative humidity at 500 nm from OPAC database 
  * aerosol optical thickness: 0.2
  * aerosol optical properties: {{:intercomparisons:phase_a:waso.mie.cdf|netCDF}}, {{:intercomparisons:phase_a:waso.mie.dat|ascii}} \\ The variable "phase" includes the phase matrix, as a function of the scattering angle (variable "theta"). The 4x4 scattering phase matrix for spherical droplets has four non-zero elements, which are stored in the following order: 
$ P = \begin{pmatrix} P1 &  P2 &  0 & 0 \\ P2 & P1 & 0 & 0 \\ 0 & 0 & P3 & P4 \\ 0 & 0 & -P4 & P3 \end{pmatrix} $  \\ The corresponding Legendre polynomials ("pmom") and the single scattering albedo ("ssa") are also included in the file.
{{ :intercomparisons:phase_a:waso.mie.png?600 |}}
The expansion moments over generalized spherical functions for the phase matrix have been provided by S. Korkin and are available {{:intercomparisons:phase_a:XK_A3.txt|here.}} 
  
  * Earth radius: 6371 km
  * Thickness of layer: 120 km

  * Sun-observer geometries as defined in general settings:
      * //viewing zenith angles// (deg): [0, 9, 18, 26, 34, 41, 48, 54, 60, 65, 70, 74, 78, 81, 84, 86, 88, 89, 90] (up-looking at bottom of atmosphere, down-looking at top of atmosphere]
      * //viewing azimuth angles// (deg): 0-180, 10° increment 
      * //solar zenith angles// (deg): [30, 60, 80, 87, 90, 93, 96, 99]
      * //solar azimuth angle// (deg): 0
      * //sensor altitude// (km): 0, 120