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intercomparisons:d1_rayleigh
Case D1: Rayleigh scattering
The most simple setup contains only one layer with scattering (non-absorbing) molecules. Radiance shall be calculated for various sun-observer geometries, for twilight conditions and for limb observation geometries. We use the same model setup as for case B1, only change from plane-parallel to spherical geometry.
Setup:
- optical thickness of layer: 0.5
- Rayleigh depolarization factor: 0.03
- no molecular absorption
- Earth radius: 6371 km
- Thickness of layer: 100 km
- D1_1: Twilight radiance field (normalized to incident irradiance) at the bottom of the layer:
- sun position: sza:92°, saa:65°
- viewing zenith angles: vza: 0° - 90°, 5° increment (up-looking)
- viewing azimuth angles: vaa: 0° - 360°, 5° increment
- D1_2: Limb radiance at top of atmosphere for 20 km tangent height
- viewing zenith angle at TOA: vza: 81.9°
- viewing azimuth angle at TOA: vaa: 30°
- solar zenith angles: sza: 0° - 90°, 5° increment
- solar azimuth angles: saa: 0° - 360°, 5° increment
Output format:
Please include your data in the netcdf file IPRT_phase3_MODELNAME.nc.
intercomparisons/d1_rayleigh.txt · Last modified: 2025/07/17 19:23 (external edit)
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