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Mini-automatic radar plotting aid (or MARPA) is a maritime radar feature for target tracking and collision avoidance. Targets must be manually selected, but are then tracked automatically, including range, bearing, target speed, target direction (course), CPA (closest point of approach), and TCPA (time of closest point of approach), safe or dangerous indication, and proximity alarm.
A typical shipboard ARPA/radar system. A marine radar with automatic radar plotting aid (ARPA) capability can create tracks using radar contacts. [1] [2] The system can calculate the tracked object's course, speed and closest point of approach [3] (CPA), thereby knowing if there is a danger of collision with the other ship or landmass.
Automatic target recognition (ATR) is the ability for an algorithm or device to recognize targets or other objects based on data obtained from sensors.. Target recognition was initially done by using an audible representation of the received signal, where a trained operator who would decipher that sound to classify the target illuminated by the radar.
Marpa may refer to: Marpa Lotsawa (1012–1097), Tibetan Buddhist teacher credited with the transmission of many Buddhist teachings to Tibet from India; Marpa, Peru, ruins of a pre-Columbian town located along the Cotahuasi Canyon in the Andes range of southern Peru; MARPA, Modification and Replacement Parts Association; Mini-automatic radar ...
The AN/TPQ-43 radar was mounted on a boom that extended upward from the rear of the Gama Goat's trailer. It is a pulse doppler radar that operates in the D band and has a range of about 20 km. Data from the radar was generally not used at the radar site itself, but broadcast over FM radio to the "Target Alerting Data Display Set" (TADDS), a ...
Stationary target indication (STI) is a mode of operation for radar that enables the operator to discriminate between a target and clutter. [1] Contrast with MTI
An Israeli Shilem counter-battery radar Functional principle of counter-battery radar. A counter-battery radar or weapon tracking radar is a radar system that detects artillery projectiles fired by one or more guns, howitzers, mortars or rocket launchers and, from their trajectories, locates the position on the ground of the weapon that fired it.
The PPE PGSR-3i ‘Beagle’ is a unique lightweight man-portable radar designed and produced by Pro Patria Electronics in Hungary. It is capable of intercepting, detecting and tracking targets moving on or close to the ground. It can also classify and differentiate targets based on their size and movement characteristics.
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