300 



250 



200 



cc 



D 

 I- 

 < 

 CC 



lU 



a. 



5 



SEA 



— (VERTICAL 

 POLARIZATION) 



150 



I- 

 I 



tr 

 m 



> 



< 

 S 

 o 

 cc 

 o 



100 



50 



WOODEN 

 VESSEL 



(B) 



SEA 

 (HORIZONTAL 

 POLARIZATION) 



(A) 

 PERFECTLY 

 REFLECTING ^ 



VESSEL • 



/ 



/ 



V 



20 40 60 80 



ANGLE OF INCIDENCE — degrees 



NOTE: Both horizontal and vertical polarization 

 are equal. 



FIGURE 6 MICROWAVE BRIGHTNESS TEMPERATURE OF THE SEA 

 COMPARED WITH A PERFECTLY REFLECTING VESSEL 

 AND A PERFECTLY ABSORBING VESSEL AT 20 GHz 

 (Sea Temperatures from Reference 10) 



53 



