. The Bell System technical journal . (r9iii3j; Fi([. 26—Monthly avcraRvs of (liuriial variation of sijjnal to noise ratio; Rocky Point, L. I. (2 X S) reccivi-il at New SoiitliKati-, Knuland; KW radiated Power —57,000 t vcles—5480 Km—1)23-24 491. 3 S 7 9 It I 3 3 Fig. 27—Monthly averages of diurnal variation of signal to noise ratio, Northolt,Eng. (GKB) received at Belfast, Maine— K\V radiated power—4980 Km—52,000 cycles—1924 492 BELL SYSTEM TECH SIC AL decline than is the lower frequency. During the summer time,afternoon rec
. The Bell System technical journal . (r9iii3j; Fi([. 26—Monthly avcraRvs of (liuriial variation of sijjnal to noise ratio; Rocky Point, L. I. (2 X S) reccivi-il at New SoiitliKati-, Knuland; KW radiated Power —57,000 t vcles—5480 Km—1)23-24 491. 3 S 7 9 It I 3 3 Fig. 27—Monthly averages of diurnal variation of signal to noise ratio, Northolt,Eng. (GKB) received at Belfast, Maine— K\V radiated power—4980 Km—52,000 cycles—1924 492 BELL SYSTEM TECH SIC AL decline than is the lower frequency. During the summer time,afternoon reception in England is belter on the higher frequencychannel. This is Ijecause of the considerably greater static exper-ienced at this time on the lower frequency. The higher signal-to-noise ratio prevailing during the winter month of January as com-pared with the summer month of July is evident. This is due primar-ily to higher summer static. Seasonal Variation in Eni^land and United States. 1-Or the 57-kilocycle channel there is shown in Fig. 20, for each month of theyear, signal-to-noise ratios of two years data. These show a distinctdip corresponding to the sunset dip of the signal field strength. Thenight-time values arc generally high in accordance with the highnight-time signal
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
