Geoscience Reference
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algorithm or, in other words, the analysis of the coincidence of the calculation
results with the certain expected values is interpreted as code testing (Borovin
et al. 1987). The considered code is related to the class, where the analytical
(“hand”) testing is principally impossible (Borovin et al. 1987), so themainway
of testing is the careful individual verification of the separate blocks during the
program debugging stage. Besides, the comparison of the results of our calcu-
lations with the data presented in the topic by Lenoble (1985, Tables 9-11) has
been carried out. The deviation of the results of the calculation with the tested
code from the “exact” data (Lenoble 1985) has turned out to be less than 1%.
Taking into account that these “exact” data (Lenoble 1985) have been averaged
over independent calculations implementedwith seven different methods with
the accuracy within 1%, the mentioned coincidence of the results of the tested
computer code and the “exact” data could be accepted as the complete one.
Thecomparisonofthecalculationresultswiththeobservationaldatais
shown in Fig. 5.3 as another technical test of the calculation algorithm. These
calculationsareaccomplishedforthemeanmodeloftheatmosphere(Ander-
son et al. 1996) together with the ground aerosol model (Krekov and Rakhi-
mov 1986). We have not naturally expected the coincidence but the qualitative
similarity of the spectra shapes, the widths and positions of the molecular
Fig. 5.3.
Comparison of the calculation results (
dotted lines
) with the experimental data
(
solid lines
). The airborne sounding 16th May 1984, water surface, incident solar angle
43
◦
.Verticalprofilesofthedownwelling(
upper group of the curves
)andupwelling(
lower
group of the curves
) irradiances. Each group consists of 6 curves from 500 mbar (
uppers
)to
1000 mbar (
lowers
) at every 100 mbar
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