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Method for removal of LIDAR background backscattering by subtraction of multiple-delayed return signal
Method for removal of LIDAR background backscattering by subtraction of multiple-delayed return signal
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机译:减法多次延迟返回信号消除激光雷达本底后向散射的方法
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摘要
In certain light detection and ranging (LIDAR) systems it is necessary to remove the normal aerosol backscattering signal of the atmosphere so that a weak atmospheric turbulence signal of interest, which is present on the backscattering, may be observed. In this disclosure, only one LIDAR pulse is used wherein the return signal is fed equally into four separate delay lines. The four different delayed signals are subtracted to cancel the background and are amplified to give an output signal for which the background is largely removed while retaining the signal of interest. The signal of interest is then amplified and displayed and/or analyzed.
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