- CRATER LAKE, AUGUST 5, 1966 



H(O.Om,-) 



0Q01 I ■ ■«■ 1 1 1 1 1 1 ■ i ■ 1 1 ■ 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ■ 1 1 1 1 1 1 1 1 1 ■ 1 1 1 1 1 1 1 1 1 1 ■ 1 1 1 1 1 1 1 1 1 1 1 1 1 1 > t ■ i ■ ■ 



350 400 450 500 550 600 650 700 750 

 X, nm 



Figure 6. Spectral composition of downwelling and upwelling irradiance in lake 

 water with 106- ft Secchi visibility (references 3 and 6). 



The clarity of water in seas and oceans is not a constant, but varies with location, 

 time of the year, and weather conditions. The designer of an underwater solar cell power 

 supply must consider these factors or the solar cell array will be either too big or too small 

 to supply the required electrical power for the electronics in a submerged marine device at 

 a given location. 



Power Output of Submerged Solar Cells 



Approach. To provide general values of power output expected from solar cells sub- 

 merged to different depths in open sea, coastal, and lake waters, a set of solar cell panels was 



11 



