Earth bulge In telecommunications , Earth bulge refers to the effect of earth's curvature on radio propagation. It is a consequence of a circular segment of earth profile that blocks off long-distance communications. See more Line-of-sight propagation is a characteristic of electromagnetic radiation or acoustic wave propagation which means waves travel in a direct path from the source to the receiver. Electromagnetic transmission includes … See more Low-powered microwave transmitters can be foiled by tree branches, or even heavy rain or snow. The presence of objects not in the direct line-of-sight can cause diffraction effects that disrupt radio transmissions. For the best propagation, a volume known as … See more • Anomalous propagation • Dipole field strength in free space • Knife-edge effect • Multilateration See more Although the frequencies used by mobile phones (cell phones) are in the line-of-sight range, they still function in cities. This is made possible by a … See more The radio horizon is the locus of points at which direct rays from an antenna are tangential to the surface of the Earth. If the Earth were a perfect sphere without an atmosphere, the radio horizon would be a circle. The radio horizon … See more • • Article on the importance of Line Of Sight for UHF reception • Attenuation Levels Through Roofs • Approximating 2-Ray Model by using Binomial series by Matthew Bazajian See more WebEarth Bulge When planning for paths longer than seven miles, the curvature of the earth might become a factor in path planning and require that the antenna be located higher off the ground. The additional antenna height needed can be calculated using the following formula: 8 D2 H = where H = Height of earth bulge (in feet)
地球中心 - Translation into English - examples Chinese Reverso …
Weba. The measurement of the angle of the main lobe as represented on the azimuth chart. b. The distance between the two points on the horizontal axis where the signal decreases by a third. This distance is measured in degrees. c. The distance between the two -3 dB power points on the horizontal axis, measured in degrees. d. WebSep 11, 2024 · BLOS, beyond NLOS. Beyond-line-of-sight (BLOS) propagation is a special case of NLOS often encountered in very long-distance communication links blocked by earth bulge, terrain, or other obstructions. BLOS and NLOS are virtually identical conditions with BLOS being used by the military to describe much the same conditions as NLOS. chip dip holder
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Web2. 〔 数・量 などの 〕 ( しばしば 一時的な) 増加 ， 膨張; 急騰 〔 in 〕. a bulge in birth statistics 出生 統計 における 増加. 動詞 自動詞. 1. ふくれる ， 突き出る 〈 out 〉. bulging muscles 盛り あ がった 筋肉. 2. 〔…で〕 ふくれている ， いっぱいである 〔with〕. WebSep 5, 2008 · Earth bulge describes the effect of physical earth curvature along a direct path between two points on the earth's surface. The earth surface appears to "bulge … WebOct 10, 2024 · If you push in at one place, the surface will indent. Surrounding that indentation, the ball will bulge outward. Near the end of the last Ice Age, just 20,000 … chip dip easy