Dear all,

In atmospheric correction, how seadas calculate the interaction term between molecular and aerosol scattering (Rho-ra)? is there any LUT?

Thanks

Assuming you are familiar with the Gordon and Wang 1994 algorithm, there is a geometry-specific quadratic equation that relates single to multiple scattering for each aerosol type (aerosol model).  The coefficients of those quadratics are stored in the aerosol LUTs.

-- bryan

Sorry, would you like to show me the geometry-specific quadratic equation here, please

See Figure 2 of:

Howard R. Gordon and Menghua Wang, "Retrieval of water-leaving radiance and aerosol optical thickness over the oceans with SeaWiFS: a preliminary algorithm," Appl. Opt. 33, 443-452 (1994)
http://www.opticsinfobase.org/abstract.cfm?URI=ao-33-3-443.

I found what I need in your answer for other question.

The poly coefficients are applied to rss (in log space) to derive rms. This is from the routine rhoas_to_rhoa().

   lnrhoas = log(rhoas[iw]*aeroob(sensorID,iw,cf,wv));
   rhoa[iw] = exp(a + b*lnrhoas + c*lnrhoas*lnrhoas);

What the meaning of "aeroob" ?

Thanks

aeroob is a function that performs an out-of-band water-vapor correction.
See the code aerosol.c