Detector perturbation of ocean radiance measurements

Burns Macdonald; William S. Helliwell; James Sanborn; Kenneth John Voss

doi:10.1117/12.48875

1 December 1991 Detector perturbation of ocean radiance measurements

Burns Macdonald, William S. Helliwell, James Sanborn, Kenneth John Voss

Proceedings Volume 1537, Underwater Imaging, Photography, and Visibility; (1991) https://doi.org/10.1117/12.48875
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

The effect of a detector on the ocean radiance field being measured has been investigated -- first, in a simple model that accounts for perturbations in the radiance field introduced by the detector shadow and by light reflecting from the detector, and second, by a complete three- dimensional solution of the radiation transfer equation that calculates the perturbations by using a computer model of a 4(pi) radiance detection system (RADS²) with sky and ocean parameter choices to match California coastal water. Results show that the presence of the detector has little influence on downwelling measurements nor do changes in detector reflectance. There is a substantial change due to the detector of upwelling radiance values. This may cause measured values to be reduced by as much as 30% below the unperturbed radiance for systems of the size of RADS (0.5 m) for light coming from the region of the detector shadow. The upwelling irradiance for this case is reduced 10%. Results are given for sensor 0.5 m high and having diameters from 0.125 m to 2 m.

Citation Download Citation

Burns Macdonald, William S. Helliwell, James Sanborn, and Kenneth John Voss "Detector perturbation of ocean radiance measurements", Proc. SPIE 1537, Underwater Imaging, Photography, and Visibility, (1 December 1991); https://doi.org/10.1117/12.48875

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available