Radiometer for light in the sea

William Doss; Willard H. Wells

doi:10.1117/12.21457

1 September 1990 Radiometer for light in the sea

William Doss, Willard H. Wells

Proceedings Volume 1302, Ocean Optics X; (1990) https://doi.org/10.1117/12.21457
Event: 1990 Technical Symposium on Optics, Electro-Optics, and Sensors, 1990, Orlando, FL, United States

Abstract

We have built a radiometer that measures ten integral moments of the radiance as functions of depth in natural waters. From these data it is possible to calculate nine spherical moments of the scattering function, providing this function varies slowly in horizontal planes (i.e. the water is fairly stratified). This technique inverts the equations of radiative transfer, which avoids some limitations of conventional instruments. The radiometer does not rely on small samples. Moreover, it measures coefficients that apply directly to radiative transfer, avoiding intercalibration problems from multiple instruments. The instrument is symmetrical about its vertical axis. Reflecting optics look through a cast acrylic tube 20 centimeters outside diameter and 1.6 meters long. Design depth is 150 meters. So far we have tested the radiometer in a pool. Soon we expect to make it seaworthy and take it on a voyage.

Citation Download Citation

William Doss and Willard H. Wells "Radiometer for light in the sea", Proc. SPIE 1302, Ocean Optics X, (1 September 1990); https://doi.org/10.1117/12.21457

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