. The Bell System technical journal . 2:00 RM. 2:30 3:00 _l < 40O 30 20 10 / METERS V _ -^ V V V V V METERS ^-^ \ / AUG. 8, 1935 5:30 STANDARD TIME 6:00 Fig. 10—Comparison of simultaneous slow fading on two slightly different wave-lengths, vertically polarized transmission. superposed on mild rollers, again for and meters. The timescale is here magnified three times. An in and out similarity can beseen, especially for the rollers. In the section on theory these simi-larities are further discussed. 504 BELL SYSTEM TECHNICAL JOURNAL 30 20 10 MET
. The Bell System technical journal . 2:00 RM. 2:30 3:00 _l < 40O 30 20 10 / METERS V _ -^ V V V V V METERS ^-^ \ / AUG. 8, 1935 5:30 STANDARD TIME 6:00 Fig. 10—Comparison of simultaneous slow fading on two slightly different wave-lengths, vertically polarized transmission. superposed on mild rollers, again for and meters. The timescale is here magnified three times. An in and out similarity can beseen, especially for the rollers. In the section on theory these simi-larities are further discussed. 504 BELL SYSTEM TECHNICAL JOURNAL 30 20 10 METERS A n, -^•^ V\r^ fi Xfsr Vvifl \k\u 4^ {r\ u )r\i V DIr MAR. 5, 1935. 4:00 RM 4:30 STANDARD TIME 5:00 RM. Fig. 11—Comparison of simultaneous active fading on two slightly different wave-lengths, vertically polarized transmission. 30 20 Io Z 10 < 2 o ^0 50 < 40 30 METERS J^ ^^-^^Ho/f ^ 0f^ W^ -vw 1 1 MAR. 6. 1935 4,65 METERS \ l\iJJJU /^ V^ W ** 1:30 1:35 RM. 1:40 RM. EASTERN STANDARD TIME 1:45 RM. Fig. 12—Comparison of simultaneous scintillation fading on two slightlydifferent wave-lengths, vertically polarized transmission. The time scale has beenexpanded. Effect of Distance and Antenna Height on Fading In planning this work a survey for a receiving site was made bymeans of a portable receiver in a car. Later, simultaneous reception ULTRA-SHORT-WAVE TRANSMISSION 505 was had at East Moriches and West Sayville, on three days. Thesurvey data were not sufficient to establish any proposition beyondthe statement that the signal strength fell rapidly with distance, withthe intensity of fading coming up as the signal fell
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