Typical optical parameters are presented in Chap. 12.
But for studying dependences of interest optical parameters might be varied
regardless of the real atmosphere values. The incident solar flux is assumed F 0 ¼ 1.
14.6.3 Sequential Steps of the Exercise Implementation
The computer program “ODNOKRAT.exe” calculates desired characteristics.
After running, the dialog is opened. The first question is
Input filename for results:
It is recommended to input name of the resulting file. Calculation results are
output to this file, while program rerunning the file content is rewritten. It is open till
the program is terminated.
The three stages are accomplished:
The first stage is studying the dependency of the transmitted irradiance (downward flux) on the solar incident angle (Sun zenith angle). There are sequent
questions:
Input optical depths:
It is recommended to input two-three values of the optical thickness t 0 , e.g.
corresponding to the low aerosol content 0.1, mean 0.3 and high 0.7.
Attention! Several values divided by space in one line. For proposed example:
0.1 _0.3_0.7 “Enter”. Here the symbol “_” means space.
Input single scattering albedo values:
It is recommended to input two-three values of the single scattering albedo o, e.g.
nearly conservative aerosols 0.9999, weak absorption 0.9, and strong absorption 0.6.
Input phase function parameters:
It is recommended to input two-three values of the phase function asymmetry
parameter g, e.g. values corresponded to near isotropic phase function 0.2 for fine
aerosol particles, extended phase function 0.6 for 1–2 micron-sized particle, and
strongly extended 0.75 for big aerosol particles.
The program calculates the transmitted irradiance as function of solar zenith
angle for the set of all input parameters and output the result to fixed file.
The second stage is studying the transmitted irradiance dependence on the
atmosphere optical thickness. There are questions:
Input solar zenith angles (grad):
Input two-three values of solar zenith angle (degrees). It is recommended values
correspond to high solar position 45.0, mean value 65.0, and low Sun 80.0.
Input single scattering albedo values:
Input phase function parameters:
Answers are considered above.
The program calculates the transmitted irradiance as a function of the optical
thickness for set of all input parameters and output to the fixed file.
14.6 Practice 13
145
But for studying dependences of interest optical parameters might be varied
regardless of the real atmosphere values. The incident solar flux is assumed F 0 ¼ 1.
14.6.3 Sequential Steps of the Exercise Implementation
The computer program “ODNOKRAT.exe” calculates desired characteristics.
After running, the dialog is opened. The first question is
Input filename for results:
It is recommended to input name of the resulting file. Calculation results are
output to this file, while program rerunning the file content is rewritten. It is open till
the program is terminated.
The three stages are accomplished:
The first stage is studying the dependency of the transmitted irradiance (downward flux) on the solar incident angle (Sun zenith angle). There are sequent
questions:
Input optical depths:
It is recommended to input two-three values of the optical thickness t 0 , e.g.
corresponding to the low aerosol content 0.1, mean 0.3 and high 0.7.
Attention! Several values divided by space in one line. For proposed example:
0.1 _0.3_0.7 “Enter”. Here the symbol “_” means space.
Input single scattering albedo values:
It is recommended to input two-three values of the single scattering albedo o, e.g.
nearly conservative aerosols 0.9999, weak absorption 0.9, and strong absorption 0.6.
Input phase function parameters:
It is recommended to input two-three values of the phase function asymmetry
parameter g, e.g. values corresponded to near isotropic phase function 0.2 for fine
aerosol particles, extended phase function 0.6 for 1–2 micron-sized particle, and
strongly extended 0.75 for big aerosol particles.
The program calculates the transmitted irradiance as function of solar zenith
angle for the set of all input parameters and output the result to fixed file.
The second stage is studying the transmitted irradiance dependence on the
atmosphere optical thickness. There are questions:
Input solar zenith angles (grad):
Input two-three values of solar zenith angle (degrees). It is recommended values
correspond to high solar position 45.0, mean value 65.0, and low Sun 80.0.
Input single scattering albedo values:
Input phase function parameters:
Answers are considered above.
The program calculates the transmitted irradiance as a function of the optical
thickness for set of all input parameters and output to the fixed file.
14.6 Practice 13
145