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A Doppler velocity sensor (DVS) is a specialized Doppler radar that uses the Doppler effect to measure the three orthogonal velocity components referenced to the aircraft. When aircraft true heading , pitch and roll are provided by other aircraft systems, it can function as a navigation sensor to perform stand-alone dead reckoning navigation ...
Classic-style hook echo of the F5 1999 Bridge Creek-Moore tornado.. A hook echo is a pendant or hook-shaped weather radar signature as part of some supercell thunderstorms.It is found in the lower portions of a storm as air and precipitation flow into a mesocyclone, resulting in a curved feature of reflectivity.
A wind profiler is a type of weather observing equipment that uses radar or sound waves to detect the wind speed and direction at various elevations above the ground. Readings are made at each kilometer above sea level, up to the extent of the troposphere (i.e., between 8 and 17 km above mean sea level).
Look-down/shoot-down radars have been enhanced with electronic programs that process the radar image and search for moving objects, which are detected by looking for Doppler shifts in the radar return. See moving target indication. The radar removes all stationary objects (e.g. the ground and buildings) from the display and shows only moving ...
The First Anglo–Powhatan War lasted from 1609 to 1614 between the Powhatans and the colonists. [6] De La Warr sent George Percy and James Davis with 70 men to attack the Paspahegh town on August 9, 1610, burning houses and cutting down cornfields.
Powhatan was the flagship of the South Pacific Squadron 1866–1869, commanded by Rear Admiral John A. Dahlgren from 12 December 1866 to 14 July 1868. In March 1866 she was sent to Valparaíso to protect U.S. interests during the Chincha Islands War .
Delay Doppler coordinates are coordinates typically used in a radar technology-inspired approach to measurement. [1] [2] When used in wireless communication, the Delay Doppler domain mirrors the geometry of the reflectors comprising the wireless channel, which changes far more slowly than the phase changes experienced in the rapidly varying time-frequency domain.
Radar Doppler Multitarget (RDY in its French acronym) is a multimode Look-down/shoot-down Pulse-Doppler radar designed by Thomson-CSF (now Thales) for the Mirage 2000-5 fighter. The RDY-3 derivative has been fitted to Moroccan Mirage F1s .
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