1206 THE BELL SYSTEM TECHNICAL JOURNAL, SEPTEMBER 1956 



2. The average incident field was determined by a height run with a 

 standard horn. 



3. The decibel gain of the antenna was then calculated by adding the 

 db gain of the standard horn to the db difference in the signal levels 

 determined in (1) and (2). 



The problem of adjusting the 60-foot antenna for maximum received 

 signal at 4 kmc and 9.4 kmc was complicated by the scintillations of the 



/■^'^:^\\^ 









Fi{ij. 9 -A view of the iuitennus at Crawl'uiU Hill used for beyund-t he-horizon 

 propagation studies and showing the 60-foot, a 28-foot and an 8-foot paraboliod, 

 the latter between the two larger ones. 



