This document describe the method we used to measure Ed and Lw by HyperPro and Ed, Lsky and Lt by HyperSAS, respectively.

For both instruments, the dark signal was already subtracted. Data records with tilting larger than 5 degree are removed.

For HyperPro:
We used method by Lee et al. (Applied Optics, Vol. 52, No. 8, 1693-1701, 2013). A cone was mounted to the Lu sensor for blocking sky light. Ideally, Lu sensor is supposed to
measure Lw directly. So Rrs can be calculated by Lw/Ed directly.

For HyperSAS:
Ed sensor was mounted vertically on the top of the vessel, Lsky sensor was configured as 40 degrees from zenith, and Lt sensor was 40 degrees from nadir. To calculate the Lw,
we usually use RHOsky=0.028 to correct the effect of sky radiance on Lt, that is, Lw=Lt-0.028*Lsky. However, you could try other RHOsky coefficient. Overall, 
Rrs=(Lt-RHOsky*Lsky)/Ed.

Contributors:

Instructors: Emmanuel Boss and Mary Jane Perry 每 UMaine
Curt Mobley 每 Sequoia Scientific
Collin Roesler 每 Bowdoin College
Ken Voss 每 U. Miami
Jeremy Werdell 每 NASA Goddard
Ron Zaneveld 每 WET Labs

TA: Ali Chase 每 UMaine

Students:
Eli Aghassi, Matt Beck, Erin Black, Javier Concha, Lino de Carvalho, Shungu Garaba, Aya Hozumi, Ishan Joshi, Grace Kim, Thomas Leeuw, Linhai Li, Lei Liu, Morgaine McKibben,
Marta Ramires Perez, Sophie Renaut, Jing Tan, Jing Tao, Elizabeth, Sam Wilson, Ashley York

Help from: Nathan Briggs, Ivona Cetinic, Jim Loftin  每 UMaine