In telecommunication, radio horizon is the locus of points at which direct rays from an antenna are tangential to the surface of standard horizon vhf radio the Earth. If the Earth were a perfect sphere and there were no atmospheric anomalies, the radio horizon would be a circle. To compute radio horizon calculator the radius of the circle drawn on the earth in such a case use the formula:
This is the geometric, straight line of sight horizon. For an equivalent formula for an antenna height in metres and a radio horizon in kilometres would be
The radio horizon of the transmitting and receiving antennas can be added together to increase the determine radio horizon effective communication range.
Antenna Heights above 1 million feet (1966 miles - 3157 kilometres) standard horizon intrepid vhf radio will cover the entire hemisphere and not increase the horizon radio radio horizon.
VHF the horizon jazz radio new mexico and UHF radio radio horizon calculation signals will bend slightly replacement radio for plymouth horizon toward the earth's surface. This bending effectively increases the radio horizon and therefore slightly increases the formula constant. radio horizon The ARRL Antenna Book gives a constant of 1.415 for the feet/miles formulat for weak signals during normal tropospheric conditions. This can usefully be approximated as:
In radio shack satellite horizon to horizon practice, radio wave propagation is affected by radio horizon and compute atmospheric conditions, and the presence of obstructions, nicad battery for standard horizon hx-350s radio for example mountains or trees. The simple formula above gives a best-case approximation radio horizon plots of the maximum propogation distance but is not sufficiently adequate for determining the quality of service at any location.
References:
- The ARRL Antenna Book, 19th Edition, R. Dean Shaw, pp 22-25
- Federal Standard 1037C, in support of MIL-STD-188
Electronics Topics
The field of electronics is the study and use of systems that operate by controlling the flow of electrons or other electrically charged particles in devices such as thermionic valves and semiconductors. The design and construction of electronic circuits to solve practical problems is part of the fields of electronic engineering, and the hardware design side of computer engineering. The study of new semiconductor devices and their technology is sometimes considered as a branch of physics.
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