y 



i 



SCATTERING RESULTS 



Figure 4 shows the angular distribution of scattered rays. The sum of rays :.n each 

 2-degree angular bin >s expressed as a decibel by taking -10 log of he ratio of the ray sum in a 

 bin to the total rays launched. Keel disinbuhop A of Fig. 3 was used. The surprising tesult hce 

 is that almost ail rays are scattered into the forward direction. Very small backsumerir.g lobes 

 can be seen for the steeper rays. Note ako that a significant specular component does not show 

 up for angles of incidence below 6 degrees. 



3 



»."> 



% 





Figure 4 Energy scartered into 2-degree bins as a fraction of 

 total energy m a plane wave striking keel set A at the designated 

 angle (grazing ang'e for a ray) 



