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sequence of one to nine photos is obtained on each of four ranges after which 

 the system turns off until the next scheduled observation. 



Wave images show single and multiple long-crested wave trains permitting 

 observation of wave refraction and shoaling. The information content in the 

 radar images is similar to that in aerial photos. However, radar images can 

 be collected at night, during overcast, and in light rain conditions. Radar 

 imagery is more limited than aircraft imagery in geographical coverage and in 

 the quality of the imagery. 



Good agreement was found between estimates of wave direction and length 

 obtained with radar and those obtained with other observational techniques. 



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