. Airborne Man-Made Radio Noise Assessment. Radio noise; Meteor burst communications. ftNTENNA NOISE FACTOR Tea 58 "a 58 I" DISTANCE FROM AREA CENTER (MILES) 158 Figure 8. Daytime 45 MHz man-made "^ .ode f« altitudes of 10 and 80 thousand fee above a buj« o£ Radio noise power, F (dB/KTb), is plotted as distance in miles from the city center. CONTOURS ., i ,-»n nroduce contours of constant The airborne man-made radio noisemodel can prod ^ ^ noise on the operation of MBCS. ^ «. hundred of the nations ^J^ ^^L^O noise in the and military installations are «*" "^'
. Airborne Man-Made Radio Noise Assessment. Radio noise; Meteor burst communications. ftNTENNA NOISE FACTOR Tea 58 "a 58 I" DISTANCE FROM AREA CENTER (MILES) 158 Figure 8. Daytime 45 MHz man-made "^ .ode f« altitudes of 10 and 80 thousand fee above a buj« o£ Radio noise power, F (dB/KTb), is plotted as distance in miles from the city center. CONTOURS ., i ,-»n nroduce contours of constant The airborne man-made radio noisemodel can prod ^ ^ noise on the operation of MBCS. ^ «. hundred of the nations ^J^ ^^L^O noise in the and military installations are «*" "^'Lif for the continental Unrted computer Noise calculation, are contours are cal- sSes on a rectangular grid wifJf^^Ze£tween 30 and 70 MH* at alti- Llated from this grid of ^ '« ^"JJ ^d nlghttime conditions. Figure 9 containing noise l£ ^ on , rop ,f this scale, the 30 dB contours are too small toner 13. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Roy, T. N; Naval Ocean Systems Center (U. S. ). Ft. Belvoir Defense Technical Information Center
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