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intercomparisons:intercomparisons
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intercomparisons:intercomparisons [2025/07/21 21:29] 127.0.0.1 external edit |
intercomparisons:intercomparisons [2026/02/16 09:18] (current) claudia |
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| * The viewing azimuth angle is defined clockwise | * The viewing azimuth angle is defined clockwise | ||
| * The sun position is the position of the sun in the sky defined by solar zenith angle sza and solar azimuth angle saa. Note that the direction vector (vza, vaa) is then opposite to the solar beam travel direction (vaa = saa indicates that the sensor looks into the direction of the sun, vaa-saa = 180° means that the sun is in the back of the sensor) | * The sun position is the position of the sun in the sky defined by solar zenith angle sza and solar azimuth angle saa. Note that the direction vector (vza, vaa) is then opposite to the solar beam travel direction (vaa = saa indicates that the sensor looks into the direction of the sun, vaa-saa = 180° means that the sun is in the back of the sensor) | ||
| + | * Please note that all phase matrices should be interpolated linearly in scattering angle | ||
| * The output format is ascii, details are provided for the individual test cases | * The output format is ascii, details are provided for the individual test cases | ||
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| ==== Phase III - 1D spherical geometry ==== | ==== Phase III - 1D spherical geometry ==== | ||
| - | === General conventions === | + | === General conventions and settings === |
| {{ :intercomparisons:phase_d:spherical_system.png?400 |Figure from Gao et al. 2023, https://doi.org/10.5194/amt-16-5863-2023}} | {{ :intercomparisons:phase_d:spherical_system.png?400 |Figure from Gao et al. 2023, https://doi.org/10.5194/amt-16-5863-2023}} | ||
| - | * Definition of angles for all simulations in spherical geometry: We refer to the angles at the position of the observer, i.e. at the top of the atmosphere VZA=θ<sub>v</sub>' and SZA=θ<sub>0</sub>'. For the observer at the surface VZA=θ<sub>v</sub> and SZA=θ<sub>0</sub>. The azimuth angles also refer to the position of the observer. The figure is taken from [[https://doi.org/10.5194/amt-16-5863-2023|Gao et al. 2023]]. | + | * Definition of angles for all simulations in spherical geometry: We refer to the **angles at the position of the observer**, i.e. at the top of the atmosphere VZA=θ<sub>v</sub>' and SZA=θ<sub>0</sub>'. For the observer at the surface VZA=θ<sub>v</sub> and SZA=θ<sub>0</sub>. The azimuth angles also refer to the position of the observer. The figure is taken from [[https://doi.org/10.5194/amt-16-5863-2023|Gao et al. 2023]]. |
| - | * For all cases normalized radiances are compared (i.e. Stokes vector components devided by the extraterrestrial irradiance). | + | * Results should be provided as **normalized radiances** (i.e. Stokes vector components divided by the extraterrestrial irradiance). |
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| - | * For all cases except E6, the same sun-observer geometries are calculated: | + | * For all cases except E6, the same **sun-observer geometries** should be calculated: |
| - | + | * //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 zenith angles (degrees): [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 |
| - | * viewing azimuth angles (degrees): 0-180, 10 degress increment | + | * //solar zenith angles// (deg): [30, 60, 80, 87, 90, 93, 96, 99] |
| - | * solar zenith angles (degrees): [30, 60, 80, 87, 90, 93, 96, 99] | + | * //solar azimuth angle// (deg): 0 |
| - | * solar azimuth angle (degrees): 0 | + | * //sensor altitudes// (km): 0, 120 |
| - | * sensor altitude (km): 0, 120 | + | |
| + | * Please note that all phase matrices should be interpolated linearly in scattering angle | ||
| + | * The **output format is netcdf**, results of all cases (D and E) shall be included in a single netcdf file using {{:intercomparisons:phase_d:iprt_phase3_model.nc|iprt_phase3_XXX.nc}} as template. Please include normalized radiance and the standard deviation (if you calculate it) for each case: | ||
| + | - radiance_//case//(//case//_zout, //case//_sza, //case//_saa, //case//_vza, //case//_vaa, stokes) | ||
| + | - std_//case//(//case//_zout, //case//_sza, //case//_saa, //case//_vza, //case//_vaa, stokes) | ||
| + | | ||
| === D - Test cases for fully spherical geometry with one layer === | === D - Test cases for fully spherical geometry with one layer === | ||
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| - [[intercomparisons:d4_aerosol_spheroid|Spheroidal aerosols]] | - [[intercomparisons:d4_aerosol_spheroid|Spheroidal aerosols]] | ||
| - [[intercomparisons:d5_water_cloud|Liquid water cloud]] | - [[intercomparisons:d5_water_cloud|Liquid water cloud]] | ||
| - | - [[intercomparisons:d6_mixed|Mixed particle types]] | + | - [[intercomparisons:d6_ocean|Ocean surface]] |
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| - [[intercomparisons:e6_ocean_planet|Ocean planet]] | - [[intercomparisons:e6_ocean_planet|Ocean planet]] | ||
| - | The results of all cases (D and E) shall be included in a single netcdf file using this template: {{:intercomparisons:phase_d:iprt_phase3_model.nc|iprt_phase3_MODELNAME.nc}}. | + | |
intercomparisons/intercomparisons.1753133369.txt · Last modified: 2025/07/21 21:37 (external edit)
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