In the following, the defined structure of the NetCDF input file [run_id]_uv will be specified.
An example input file can be found under .../model/tests/cases/urban_environment/INPUT/urban_environment_uv .
Dimensions#
Following dimensions are defined in the UV input file. For the LOD1 approach, sun_zenith and wavelength are mandatory, while for the LOD2 approach sun_zenith, wavelength, view_azimuth and view_zenith are mandatory. The dimension size of view_azimuth and view_zenith must correspond to the discrete number of spherical angles along azimuth and zenith in the RTM (see raytrace_discrete_azims and raytrace_discrete_elevs in namelist radiation_parameters).
| Dimension name | Value | Description |
|---|---|---|
sun_zenith |
at least 2 | number of sun-zenith angles. Recommended: >=90 |
wavelength |
64 | number of wavelength. Recommended: >= 120 |
view_azimuth |
at least 1 | number of view azimuth angles. Recommended: >=60 |
view_zenith |
at least 1 | number of view zenith angles. Recommended: >=90 |
Variables#
Following variables are defined in the UV input file. For the LOD1 approach, uv_dir_irradiance and uv_diff_irradiance are mandatory, while for the LOD2 approach uv_radiance is mandatory. All variables are defined as NC_FLOAT.
| Variable name | Unit | Dimension(s) | Description |
|---|---|---|---|
uv_dir_irradiance |
mW m-2 nm-1 | (sun_zenith, wavelength) |
direct spectral irradiance |
uv_diff_irradiance |
mW m-2 nm-1 | (sun_zenith, wavelength) |
diffuse spectral irradiance |
uv_radiance |
mW m-2 nm-1 sr-1 | (sun_zenith, wavelength, view_zenith, view_azimuth ) |
spectral radiance |