Recently I have came across two different equations for the estimation of Remote Sensing Reflectance (Rrs), i.e.
1 - Rrs equation by Mobley, (1999) is
Rrs(λ) = Lu(λ) - ρLsky(λ) / Ed(λ)
2 - Rrs equation mentioned in the articles by Dorji et al. (2016 and 2017) is
Rrs(λ) = Lu(λ) x ρLsky(λ) / Ed(λ)
I have a confusion about the numerator of this equation, I would like to know that the terms Lu(λ) and ρLsky(λ) are being multiplied with each other or subtracted? Because in Mobley 1999 article the term ρLsky(λ) is being subtracted from Lu(λ), i.e. Rrs(λ)= Lu(λ) - ρLsky(λ) / Ed(λ)
Looking forward for the advice.
http://onlinelibrary.wiley.com/doi/10.4319/lo.1985.30.2.0286/pdf
Mobley‘s definition is correct.
Above-water reflectance should be in units of [radiance/irradiance], not in units of [radiance*radiance/irradiance].
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