Design and validation of a shipborne multiple-field-of-view lidar for upper ocean remote sensing

摘要

The oceanic lidar, which has the advantage of profiling the properties of the upper ocean, is a promising active remote sensing tool for complementing the passive ocean color remote sensing in the three-dimensional observation of ocean. This paper introduces the design and validation of a shipborne multiple-field-of-view (MFOV) lidar. With the input of simultaneous in situ data, the lidar signals and the retrieved lidar attenuation coefficient α are validated quantitatively using simulation results. The simulation methods include quasi-single-scattering lidar equation, Monte Carlo (MC) method, and analytical model. The experimental lidar signals are consistent with the simulated lidar signals with coefficient of determination R~2>0.91, and α retrieved from experimental lidar signals corresponds well with the simulated values with root mean square (RMS) of relative error δ<0.18. The results at different field of view (FOV) indicate the relationship between the beam attenuation coefficient c, diffuse attenuation coefficient K_d, and α. This work is beneficial to the research on the mechanism, retrieval and application of oceanic lidar.