500 bite APPENDIX 
NUMBER OF MODES 
TR AREED 
“30 -20 40 0 WW 20 “30 -20 -10 0 
OB ABOVE FREE SPACE 
Vicure 6. Number of modes trapped. 
Figure 4. Signal types on one-way link for low in- 
version (trapping). 
N a 
3 aNs6oxio : 
ig e 
ESSE PA = 
HALE 
= 
DECIBELS 
89° \3714 89°18 69°20' 89° 2!" 
89°I0 
© 100 200.300 400.500 600 700 
D_ STRATUM THICKNESS 
A WAVELENGTH 
Ficure 5. Signal types for high inversion. Note the 
low level of the 547-me signal. Figure 7. Reflection ratio. 
