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AN/FPS-19 long-range search radar; AN/FPS-20 20A, 20B; AN/FPS-23 fluttar radar; AN/FPS-24 long range search radar; AN/FPS-26 height finder radar; AN/FPS-27 Long Range search radar; AN/FPS-30 long-range search radar; AN/FPS-35 long range search radar; AN/FPS-41 meteorological radar; AN/FPS-49 Ballistic Missile Early Warning System (BMEWS ...
Maps (マップス) is a Japanese manga series written and illustrated by Yuichi Hasegawa. It was serialized in the Gakken magazine Monthly Comic Nora from 1985 to 1994. The series was adapted into two anime original video animations (OVAs): the 1987 original, fully titled Maps: Densetsu no Samayoeru Seijintachi (マップス 伝説のさまよえる星人たち, lit.
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.
Imaging radar is an application of radar which is used to create two-dimensional images, typically of landscapes. Imaging radar provides its light to illuminate an area on the ground and take a picture at radio wavelengths. It uses an antenna and digital computer storage to record its images.
Long-distance radars use the lower microwave frequencies since at the upper end of the band atmospheric absorption limits the range, but millimeter waves are used for short-range radar such as collision avoidance systems.
Microwave signals are normally limited to the line of sight, so long-distance transmission using these signals requires a series of repeaters forming a microwave relay network. It is possible to use microwave signals in over-the-horizon communications using tropospheric scatter , but such systems are expensive and generally used only in ...
Microwave imaging is a science which has been evolved from older detecting/locating techniques (e.g., radar) in order to evaluate hidden or embedded objects in a structure (or media) using electromagnetic (EM) waves in microwave regime (i.e., ~300 MHz-300 GHz). [1]
The radar footprint (the size of the surface area which is illuminated by the radar) must be small in comparison with all ocean wavelengths of interest. The radar spatial resolution is determined by the bandwidth of the radar signal (see radar signal characteristics) and the beamwidth of the radar antenna. The beam of a microwave antenna diverges.