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对光脉冲测距例如人造卫星测距所产生的误差的修正作了一般的分析。分析表明:关于测距误差的修正问题可用大气修正、空间修正、电子线路中的误差修正的代数和来描述。提出了用一个标准目标对所测距离进行标定和修正的方法。实际上在短距离测距中,修正距离很容易地用两个标准目标决定,即便是大气折射率和计数器时基的精度是未知的。在地面上100米到10公里的范围内用激光系统做了测距实验。在激光脉冲宽度为50毫微秒(7.5米)以及时间间隔计数器的分辨率为10毫微秒(1.5米)的情况下,用两个标准目标所修正的距离与用光电测距仪精确测定的距离很好的一致。
A general analysis of the correction of optical pulse ranging such as satellite ranging has been made. The analysis shows that the correction of ranging errors can be described by the algebraic sum of atmospheric correction, space correction, and error correction in electronic circuits. A method of calibrating and correcting the measured distance with a standard target is proposed. In practice, in short distance surveys, the correction distance can easily be determined using two standard targets, even if the accuracy of atmospheric index and counter time base is unknown. In the range of 100 meters to 10 kilometers on the ground using the laser system made a ranging experiment. With a laser pulse width of 50 nanoseconds (7.5 meters) and a time interval counter resolution of 10 nanoseconds (1.5 meters), the distance corrected with two standard targets is exactly the same as that measured with a photodetector The distance is very consistent.