GIOP preliminary configuration (May 2010)

GIOP preliminary configuration (May 2010)

Governing equations for reference:

$R_{rs} = G \frac{b_b}{a + b_b}$
$a = a_w + A_{dg} a^*_{dg} + A_\phi a^*_\phi$
$b_b = b_{bw} + B_{bp} b^*_{bp}$

Configuration of the eigenvectors and other variables:

Variable	Description	Call to L2GEN
	Transfer Rrs to rrs(0-) using Lee et al. (2002)
	Use Morel f/Q tables	giop_rrs_opt=1
$a^*_{dg}$	exp[-S( $\lambda - \lambda_0$ )]	giop_adg_opt=1
$a^*_{dg}$	S=0.018	giop_adg_s=0.018
$a^*_\phi$	OC chlorophyll into Bricaud et al. (1995)	giop_aph_opt=2
$b^*_{bp}$	$\left(\frac{\lambda}{\lambda_0}\right)^\eta$ , with $\eta$ from QAA v5	giop_bbp_opt=3
	Pope and Fry (1997)
$b_{bw}$	$b_{bw} = 0.0038 (400 / \lambda)^{4.32}$
inversion method	Levenburg-Marquardt	giop_fit_opt=1
wavelength range	400 - 700 nm

PRODFAIL (product failure) flag set when retrieved values outside the following ranges:

Variable	Failure condition
$a_{dg}(\lambda)$	$< -0.05 \: a_w(\lambda)$ or
$a_\phi(\lambda)$	$< -0.05 \: a_w(\lambda)$ or
$a(\lambda)$	$< 0.95 \: a_w(\lambda)$
$b_{bp}(\lambda)$	$< -0.05 \: b_{bw}(\lambda)$ or
$b_b(\lambda)$	$< 0.95 \: b_{bw}(\lambda)$
$R^{diff}_{rs}$

The last statistic provides an index of "goodness of fit" via:

$R^{diff}_{rs} = mean \left( \frac{|R_{rs}^{model}(\lambda) - R_{rs}^{input}(\lambda)|}{R_{rs}^{input}(\lambda)} \right)$ for $400 < \lambda < 600$ nm