An analysis of propagation measurements made at 418 megacycles per second well beyond the radio horizon (a digest). Article Swipe
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· 1960
· Open Access
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· DOI: https://doi.org/10.6028/jres.064d.028
· OA: W2327557601
During an I S-mon th period in 1952 and 1953, t ransmission loss measuremen ts at 41S megacycles were m ad e over a 134-mile p ath betwee n Cedar R apids, I owa, a nd Qilin cy, Illi nois.Continu ous r ecordings m ad e simultaneously at severa l receiving a n tenna heigh ts from 30 to 665 feet yield ed information on diurn al and seasonal variations in both the hourl y m edian bas ic transmiss ion loss a nd in height gain .These data are com pa red to p red ictions made using t he m ethod d evelop ed by Rice, Longley, a nd No r to n a nd a re found to be in good agreem en t, particularl y at t he lower a ntenn a heights.An a nalysis of the correlation of short-term signal level variations observed at horizon tall y and ver ticall y spaced antennas is d escribed .
