hi tiki: i>im>i'\<;\tio!n kksk vkcii 



27 



ating, detecting, and measuring radiation in the part 

 of the frequency spectrum under consideration. 



.'}. Required field strengths necessary for satisfac- 

 tory operation of systems employing this range of 

 frequencies. 



4. Types of equipment suitable for determining 

 location, intensity, and movement of storms, and 

 distinguishing them from permanent echoes. 



5. Handbooks of standard and nonstandard propa- 

 gation and of standard performance of radar equip- 

 ment. 



Some of the points listed are not strictly propa- 

 gation questions, but their investigation will require 



the active assistance of propagation experts for 

 solution. It is expected that systematic investigation 

 will do much to eliminate the factors of uncertainty 

 in siting and operation as well as in design of radio 

 equipment operating in the frequency bands con- 

 sidered, particularly when better methods and 

 apparatus have been developed for determining the 

 performance of the equipment itself. Such methods 

 and apparatus were by no means satisfactory during 

 the war, with the result that uncertainty as to the 

 actual condition and performance of equipment in 

 the field further complicated the already formidable 

 problem of determining propagation characteristics. 



