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English: The "Radar Next Program Overview" by the National Oceanic and Atmospheric Administration. This document was made in March 2024 and was later removed in February 2025 by an executive order from United States President Donald Trump.
An object at height h above the ground and slant range R forms an angle α that can be calculated through sin α = h / R.By re-arrangement, R = h / sin α, or R = h csc α. The radar equation states that the signal received from an object, P e, varies inversely with the 4th power of range and directly as the square of the antenna gain, G, such that P e ~ G 2 / R 4.
Fluctuation loss is an effect seen in radar systems as the target object moves or changes its orientation relative to the radar system. It was extensively studied during the 1950s by Peter Swerling, who introduced the Swerling models to allow the effect to be simulated.
This page was last edited on 26 September 2019, at 06:28 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
STC addresses this problem by implementing a reverse gain curve with the same characteristics as the radar equation, that is, a / dependency or some function close to that (often there are discrete steps). This dramatically damps down amplification of signals received shortly after the detection pulse is sent, preventing them from saturating ...
Radar is a system that uses radio waves to determine the distance (), direction (azimuth and elevation angles), and radial velocity of objects relative to the site. It is a radiodetermination method [1] used to detect and track aircraft, ships, spacecraft, guided missiles, motor vehicles, map weather formations, and terrain.
David Knox Barton (September 21, 1927 – February 11, 2023) was an American radar systems engineer who made significant contributions to air defense, missile guidance, monopulse radar, low-altitude tracking, air traffic control, and early warning radar. At age 30, he was the first winner of the David Sarnoff Award in Engineering, for his ...
In the past, radar AGC was electronically controlled and affected the gain of the entire radar receiver. As radars evolved, AGC became computer-software controlled and affected the gain with greater granularity in specific detection cells. Radar multipath echoes from a target cause ghosts to appear.