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| 二次监视了望雷达 | |||
| 副监视雷达; 二次监视雷达 (需要飞机应答机协同工作的一种雷达系统。应答机生成一个编码的应答信号回答地面站“询问机”发射的信号。因为这套系统依赖应答机生成的信号而不是飞机的反射信号，不像一次雷达,所以它拥有特定的优势,如更远的探测范围) | |||
| 二次监视雷达; 航管二次雷达 | |||
| 次级监视雷达; 二次［辅助］监视雷达 | |||
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| A radar system that requires complementary aircraft equipment transponder. The transponder generates a coded reply signal in response to transmissions from the ground station interrogator. Since this system relies on transponder-generated signals rather than signals reflected from the aircraft, as in primary surveillance radar, it offers significant operational advantages such as increased range and positive identification. | |||
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secondary surveillance radar : 7 phrases in 3 subjects |
| Aviation | 1 |
| Electronics | 3 |
| Space | 3 |
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