英语词汇“Secondary surveillance radar”字怎么读，Secondary surveillance radar的拼音、意思释义、用法及组词造句例句翻译-英语翻译词典-学习充电-依恋情感网

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词汇	Secondary surveillance radar
分类	英语词汇英语翻译词典
释义	Secondary surveillance radar 英语百科 Secondary surveillance radar Secondary surveillance radar (SSR) is a radar system used in air traffic control (ATC), that not only detects and measures the position of aircraft i.e. range and bearing, but also requests additional information from the aircraft itself such as its identity and altitude. Unlike primary radar systems that measure only the range and bearing of targets by detecting reflected radio signals, SSR relies on targets equipped with a radar transponder, that replies to each interrogation signal by transmitting a response containing encoded data. SSR is based on the military identification friend or foe (IFF) technology originally developed during World War II, therefore the two systems are still compatible. Monopulse secondary surveillance radar (MSSR), Mode S, TCAS and ADS-B are similar modern methods of secondary surveillance.
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