11-15 



INHOMOGENEOUS HALF-SPACE 



/ INCIDE^4T 

 PLANE WAVE 



FIGURE II-3 LOW FREQUENCY SCATTERING MODEL 



INCIDENT 

 PLANE WAVE 



OBSERVER 



F IGU RE II - 4 HIGH F REQUENC Y SC ATTERING MODE L F OR THE 

 INTERFERENCE RANGE 



^ 



OBSERVER 



NCIDENT 

 PLANE WAVE 



FIGURE II-5 HIGH FREQUENCY SCATTERING MODEL FOR THE 

 FOCUSING RANGE 



S-7 001-03 07 



