RT Codes Comparison Project


3. Mixed atmosphere Comparison


• Conditions of the comparison (RT3, MODTRAN, & SHARM vs. 6SV1) 


To create a mixed atmosphere, a molecular US62 atmosphere was added to each aerosol model. The molecular optical thickness depended on the wavelength:


 λ= 412 nm, τmol= 0.30319;

 λ= 440 nm, τmol= 0.2322;

 λ= 670 nm, τmol= 0.04172;


The aerosol profile was exponential with the scale height of 2 m for all codes except MODTRAN. The molecular profile was exponential with the scale height of approximately 8 m. The surface was simulated as Lambertian with the reflectance ρsurf= {0.0; 0.05}.


• Results of the comparison (RT3, MODTRAN, & SHARM vs. 6SV1) 


Figure 5. Some results of the comparison of RT3, MODTRAN, and SHARM for a mixed atmosphere with the AS aerosol constituent, bounded by black surface.


UI: Resultssurf= 0.0); Resultssurf= 0.05).

AF: Resultssurf= 0.0); Resultssurf= 0.05).

AS: Resultssurf= 0.0); Resultssurf= 0.05).


• Conditions of the comparison (6SV1 vs.Monte Carlo) 


To create a mixed atmosphere, a molecular US62 atmosphere was added to each aerosol model. The molecular optical thickness depended on the wavelength:

 λ= 412 nm, τmol= 0.30319;

 λ= 440 nm, τmol= 0.2322;

 λ= 670 nm, τmol= 0.04172;


The aerosol profile was exponential with the scale height of 2 m for all codes except MODTRAN. The molecular profile was exponential with the scale height of approximately 8 m. Only black surface cases were simulated for this part of the comparison.


• Results of the comparison (6SV1 vs.Monte Carlo) 


Figure 6. Results of the comparison of 6SV1 and Monte Carlo for a mixed atmosphere with the AS aerosol constituent.



The MC geometric configuration is explained in captions for Fig. 2 ('Results of the comparison (6SV1 vs. Monte Carlo)' in the 'Molecular atmo-sphere' section.


UI: Resultssurf= 0.0)

AF: Results.surf= 0.0)

UI: Results.surf= 0.0)