11.7 Practice 10
11.7.1 Objectives
Calculating radiative characteristics (diffuse irradiance outgoing from cloud layer,
diffuse irradiance within layer at four levels, diffuse radiance at boarders and within
cloud layer and radiative divergence) for the input optical model and geometry of
illuminating. It is to study variations of irradiances and radiative divergence versus
the optical model (optical thickness, single scattering albedo, phase function
parameter, surface albedo) and solar zenith angle, to plot obtained dependencies
and to prepare the report.
11.7.2 Sequential Steps of the Exercise Implementation
Calculation is accomplished with compute program compiled in Borland 4 Cþþ.
The file “ASYMP.exe” propose the following dialog when questions are output at
the screen sequentially.
1. Input number of wavelength
It is recommended to input the number of calculation variants;
If the dependency on one parameter is studied (e.g. optical thickness) the set of
several (e.g. 10) parameter values is input and other parameters are repeated.
2. Input number of viewing zenith angles
It is recommended to input the number of viewing angles if the intensity is
calculated;
3. Input optical thickness
It is recommended to input the optical thickness, if there are several variants
input all needed values pressing the button “Enter”
4. Input single scattering albedo
It is recommended to input the single scattering albedo (SSA), if there are
several variants input all needed values pressing the button “Enter”. If only
optical thickness is varied, input the same value of SSA several times;
5. Input asymmetry parameter
It is recommended to input the phase function parameter, if there are several
variants input all needed values pressing the button “Enter”.
6. Input ground albedo
It is recommended to input the ground (surface) albedo, if there are several
variants input all needed values pressing the button “Enter”
7. Input solar zenith angles (degrees)
It is recommended to input the zenith solar incident angle (degrees), if you’d
like to study the dependence on solar angle it is necessary to repeat the program
several times with the same optical parameters and varying solar angle.
8. Input viewing zenith angles (degrees)
11.7 Practice 10
117
11.7.1 Objectives
Calculating radiative characteristics (diffuse irradiance outgoing from cloud layer,
diffuse irradiance within layer at four levels, diffuse radiance at boarders and within
cloud layer and radiative divergence) for the input optical model and geometry of
illuminating. It is to study variations of irradiances and radiative divergence versus
the optical model (optical thickness, single scattering albedo, phase function
parameter, surface albedo) and solar zenith angle, to plot obtained dependencies
and to prepare the report.
11.7.2 Sequential Steps of the Exercise Implementation
Calculation is accomplished with compute program compiled in Borland 4 Cþþ.
The file “ASYMP.exe” propose the following dialog when questions are output at
the screen sequentially.
1. Input number of wavelength
It is recommended to input the number of calculation variants;
If the dependency on one parameter is studied (e.g. optical thickness) the set of
several (e.g. 10) parameter values is input and other parameters are repeated.
2. Input number of viewing zenith angles
It is recommended to input the number of viewing angles if the intensity is
calculated;
3. Input optical thickness
It is recommended to input the optical thickness, if there are several variants
input all needed values pressing the button “Enter”
4. Input single scattering albedo
It is recommended to input the single scattering albedo (SSA), if there are
several variants input all needed values pressing the button “Enter”. If only
optical thickness is varied, input the same value of SSA several times;
5. Input asymmetry parameter
It is recommended to input the phase function parameter, if there are several
variants input all needed values pressing the button “Enter”.
6. Input ground albedo
It is recommended to input the ground (surface) albedo, if there are several
variants input all needed values pressing the button “Enter”
7. Input solar zenith angles (degrees)
It is recommended to input the zenith solar incident angle (degrees), if you’d
like to study the dependence on solar angle it is necessary to repeat the program
several times with the same optical parameters and varying solar angle.
8. Input viewing zenith angles (degrees)
11.7 Practice 10
117