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异步应答激光测距与传统反射式激光测距相比,接收激光功率仅与距离的2次方成反比,可极大地提高卫星激光测距的作用距离,并可实现星地时差测量。该技术自提出以来一直是激光测距的重点研究方向,但目前尚未应用于卫星激光测距领域。为了验证该体制的工程可行性,掌握测量精度,文中设计并开展了地面演示验证试验,利用两台地面激光器分别模拟位于地面和航天器的终端,充分模拟真实情况下的星地异步应答激光测距。结果表明:异步应答测距体制方法可行,可用于两终端之间距离和主波时差的精确测量,其测距精度介于两个测距终端对应的反射测距精度之间。
Asynchronous response laser ranging Compared with the traditional reflection laser ranging, the received laser power is inversely proportional to the square of the distance, which can greatly improve the range of satellite laser ranging and realize the satellite time difference measurement. The technology has been the focus of laser ranging since its introduction, but it has not been applied in the field of satellite laser ranging. In order to verify the engineering feasibility of the system and to master the measurement accuracy, the ground demonstration verification test was designed and carried out in this paper. Two terrestrial lasers were used to simulate the terminals located on the ground and the spacecraft, respectively. distance. The results show that the method of asynchronous response ranging system is feasible and can be used for the accurate measurement of the distance between two terminals and the main wave time difference. The accuracy of ranging is between the accuracy of reflection ranging corresponding to the two ranging terminals.