CONCEPT OF THERMAL STABILITY 



259 



en 



2 



1.0 1.5 2.0 2.5 3.0 



LAYER HEIGHT (km) 



1.5 2.0 



LAYER HEIGHT (km) 



2.5 



3.0 



Figure 6.17. Field strength produced by layers of horizontal dimensions 2 km and 10 

 km on the Chicago-Urbana paths for two model profiles. 



