Over-the-horizon radar (OTH), sometimes called beyond the horizon radar (BTH), is a type of radar system with the ability to detect targets at very long ranges, typically hundreds to thousands of kilometres, beyond the radar horizon, which is the distance limit for ordinary radar.

2021年3月25日 · ROTHR is a long-range, land-based, wide-area surveillance system that tracks aircraft and surface ships within designated surveillance zones off the US coastline. It is now …

A series of adaptive waveforms have been developed to deal with the problem of Spread Doppler Clutter and its impact on Relocatable Over-the-Horizon Radar (ROTHR) systems for the ARPA sponsored Counterdrug Surveillance and Interdiction Program.

detects aircraft and ships, within designated surveillance zones off the U.S. coastline. Designed to operate without violating other nations’ sovereignty, ROTHR tracks each target’s speed, course, and position with high probability.

Raytheon offers a next-generation over-the-horizon radar to answer the U.S. and Canada’s call for a system that can detect and track low-altitude cruise missile threats. Over-the-Horizon Radars use high frequency radio raves and bounce the signal off the ionosphere to look for targets using a “top-down” approach.

AN/TPS-71 – R elocatable O ver- T he- H orizon R adar (ROTHR) is an HF frequency, tactical, land-based, bistatic ionospheric backscatter radar designed to provide a wide area over-the-horizon surveillance of both aircraft and ships in support of …

ROTHR supports SOUTHCOM’s drug interdiction mission as a detection and monitoring asset. Successes in detection and monitoring of air traffic have pushed traffickers to maritime/land methods. Participated in 95% of all detected trafficking events. Initial detection asset in 85% of all detected trafficking events.

超视距雷达，又称 天波雷達 （英語： Skywave OTH radar, Skywave Over-the-horizon radar 、 BTH, beyond the horizon）、 天波（Skywave）是指從 電離層 (上層大氣的帶電層)反射或折射回地球的無線電波的傳播，由於它不受地球曲率的限制，天波傳播可以用於在洲際距離上超越地平線。 它主要使用短波頻段，通常為1.6-30MHz兆赫（187.4-10.0m米）。 它使 雷达 系统能够发现非常远的目标，通常长达数千公里。 几个OTH雷达系统在20世纪50年代和60年代开始部署，用 …

2021年4月1日 · Originally developed to track long-range targets for aircraft and ships, ROTHR is now the primary detection system for border security and drug smuggling interdiction for the Joint Interagency Task Force South. In 2020 alone, ROTHR contributed to the seizure of 26 metric tons of cocaine from drug smugglers attempting to cross into U.S. territory.

2024年4月19日 · Relocatable Over-the-Horizon Radar (ROTHR), also known as AN/TPS-71, is an OTH Radar used by the United States Navy that uses bistatic ionospheric backscattering for wide area surveillance. The Radar system was developed by the US Navy with assistance from Raytheon. Three ROTHR systems are in use, in Virginia, Texas and Puerto Rico.