confusion to the transmittances in calculating rhos using SeaDAS

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zhigang
Posts: 65
Joined: Tue Nov 10, 2020 8:03 pm America/New_York

confusion to the transmittances in calculating rhos using SeaDAS

by zhigang » Mon May 24, 2021 10:20 pm America/New_York

Hi,

In the old post of ocean color forum (https://oceancolor.gsfc.nasa.gov/forum/ ... l?tid=2229), I learn about that SeaDAS made adjustments for variours transmittances in calculating rhos (surface reflectance):
rhos = PI / F0 / mu0 * (Lt / tg_sol / tg_sen - Lr) / t_sol / t_sen / t_o2 / t_h2o.
As such, it is slightly different with the simple Rayleigh corrected reflectance (e.g., Rrc in Hu et al.).

In this equation, I was wondering what is the content of t? Does it include the aerosol transmittance? Or, it only includes the gas and water vapor contribution?

Regards,
Zhigang

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jared
Posts: 8
Joined: Thu Jul 09, 2020 1:29 pm America/New_York

Re: confusion to the transmittances in calculating rhos using SeaDAS

by jared » Tue May 25, 2021 11:20 am America/New_York

Hi Zhigang,

Aerosol transmittance is not included in t_sen and t_sol when calculating rhos.

Minwei

zhigang
Posts: 65
Joined: Tue Nov 10, 2020 8:03 pm America/New_York

Re: confusion to the transmittances in calculating rhos using SeaDAS

by zhigang » Wed May 26, 2021 11:11 am America/New_York

Thanks for your reply, Minwei.--zhigang

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