We present three methods for deriving water-leaving radiance L w (λ) and remote-sensing reflectance using a hyperspectral tethered spectral radiometer buoy (HyperTSRB), profiled spectroradiometers, and Hydrolight simulations. Average agreement for 53 comparisons between HyperTSRB and spectroradiometric determinations of L w (λ) was 26%, 13%, and 17% at blue, green, and red wavelengths, respectively. Comparisons of HyperTSRB (and spectroradiometric) L w (λ) with Hydrolight simulations yielded percent differences of 17% (18%), 17% (18%), and 13% (20%) for blue, green, and red wavelengths, respectively. The differences can be accounted for by uncertainties in model assumptions and model input data (chlorophyll fluorescence quantum efficiency and the spectral chlorophyll-specific absorption coefficient for the red wavelengths, and scattering corrections for input ac-9 absorption data and volume scattering function measurements for blue wavelengths) as well as radiance measurement inaccuracies [largely differences in the depth of the L u (λ, z) sensor on the HyperTSRB].
© 2003 Optical Society of America
(010.4450) Atmospheric and oceanic optics : Oceanic optics
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(120.4640) Instrumentation, measurement, and metrology : Optical instruments
Grace C. Chang, Tommy D. Dickey, Curtis D. Mobley, Emmanuel Boss, and W. Scott Pegau, "Toward Closure of Upwelling Radiance in Coastal Waters," Appl. Opt. 42, 1574-1582 (2003)