NAFI TR-14J+0 



As Implied from the preceding, the spectral characteristics 

 of r)i(R,f) ejchibit a higher degree of variability than those of Ni(f) 

 by virtue of the propagation loss, H(R,f). Consequently, it is only 

 natural to examine what effect this variation has upon the performance 

 of a passive detection system. 



