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Precision approach radar or PAR is a type of radar guidance system designed to provide lateral and vertical guidance to an aircraft pilot for landing, until the landing threshold is reached. [1] Controllers monitoring the PAR displays observe each aircraft 's position and issue instructions to the pilot that keep the aircraft on course and ...
The equivalent radius allows the use of analytical formulas or computational or experimental data derived for antennas constructed from small conductors with uniform, circular cross-sections to be applied in the analysis of antennas constructed from small conductors with uniform, non-circular cross-sections.
For a traditional PAR, the ability to track the aircraft position is dependent on the aircraft radar cross section. TLS is based on transponder multilateration and trilateration and consequently tracks all aircraft that respond to the interrogations. Omnidirectional antenna surveillance coverage of the TLS extends to 100 nautical miles. [2]
AN/MPN-25 ITT product that scans the PAR coverage area and capable of scanning 360 degree using the same antenna. The system then process the raw target data to form a data word sending it to a computer display operating on Solaris. It is a 30 nmi (56 km) asr coverage and 20 nmi (37 km) PAR coverage.
Typical GSM sector antenna outdoor unit. A sector antenna is a type of directional microwave antenna with a sector-shaped radiation pattern.The word "sector" is used in the geometric sense; some portion of the circumference of a circle measured in degrees of arc. 60°, 90° and 120° designs are typical, often with a few degrees 'extra' to ensure overlap and mounted in multiples when wider or ...
An NVIS antenna configuration is a horizontally polarized (parallel with the surface of the earth) radiating element that is from 1 / 20 th wavelength to 1 / 4 wave above the ground. The optimum height of such an antenna is about 1 / 4 wavelength, and high angle radiation declines only slightly for heights up to about ...
The antenna is a 22.0 ft × 4.6 ft (6.7 m × 1.4 m) elliptical reflector of open lattice construction, mounted on a small two-wheeled trailer. Rotation rate is 20 rpm, the BCC – Battery Control Central and the CWAR are synchronized by the PAR revolutions and the PAR system trigger. AN/MPQ-50 (Improved Hawk to Phase III)
The AN/FRD-10 is a United States Navy circularly disposed antenna array (CDAA), built at a number of locations during the Cold War for high frequency radio direction finding and signals intelligence. In the Joint Electronics Type Designation System , FRD stands for fixed ground, radio, direction finding. 14 sites were originally constructed as ...