The third stage is studying the diffused radiances (outgoing radiation intensity)
dependences on the optical thickness. There are questions:
Input viewing directions - zenith angles and azimuths (grad):
The viewing zenith angle (m is the cosine), and azimuth j determine one viewing
direction. Thus the couple of values are input, i.e. for two viewing directions input
two couple (four values). Two directions are recommended: e.g. nadir direction:
180.0_0.0 are in most common use in remote sensing; and decline direction:
135.0_90.0. Take attention that for viewing of upward radiance the zenith angle
exceeds 90
. Then there are questions:
Input sun zenith angles (grad):
Input single scattering albedo values:
Input phase function parameters:
Answers are considered above. It is recommended to restrict one-two input
values for result amount will be reasonable.
Input surface albedo:
Input one-two surface albedo values, e.g. for snow 0.9, for vegetation and soils
0.25, for water surface 0.03.
Then the program calculates the outgoing radiances as function of the optical
thickness for the set of all input parameters and output the result in fixed file.
The program is terminated.
14.6.4 Requirements to the Report
Compile a concise report reflecting the principal stages and the obtained results of
the performed exercise in form of tables and plots (graphs). It is necessary:
– Plotting obtained dependences (diagrams present the result in case of distribution over interaction ratio).
– Describing (and physically interpreting if possible) obtained dependences.
146
14 Calculating Radiative Characteristics with the Single Scattering Approximation
dependences on the optical thickness. There are questions:
Input viewing directions - zenith angles and azimuths (grad):
The viewing zenith angle (m is the cosine), and azimuth j determine one viewing
direction. Thus the couple of values are input, i.e. for two viewing directions input
two couple (four values). Two directions are recommended: e.g. nadir direction:
180.0_0.0 are in most common use in remote sensing; and decline direction:
135.0_90.0. Take attention that for viewing of upward radiance the zenith angle
exceeds 90
. Then there are questions:
Input sun zenith angles (grad):
Input single scattering albedo values:
Input phase function parameters:
Answers are considered above. It is recommended to restrict one-two input
values for result amount will be reasonable.
Input surface albedo:
Input one-two surface albedo values, e.g. for snow 0.9, for vegetation and soils
0.25, for water surface 0.03.
Then the program calculates the outgoing radiances as function of the optical
thickness for the set of all input parameters and output the result in fixed file.
The program is terminated.
14.6.4 Requirements to the Report
Compile a concise report reflecting the principal stages and the obtained results of
the performed exercise in form of tables and plots (graphs). It is necessary:
– Plotting obtained dependences (diagrams present the result in case of distribution over interaction ratio).
– Describing (and physically interpreting if possible) obtained dependences.
146
14 Calculating Radiative Characteristics with the Single Scattering Approximation