星载海洋激光雷达最佳工作波长分析

刘群; 刘崇; 朱小磊; 周雨迪; 乐成峰; 白剑; 贺岩; 毕德仓; 刘东

doi:10.3788/CO.20201301.0148

Volume 13 Issue 1

Feb. 2020

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Article Contents

Chinese Optics > 2020 > 13(1): 148-155.

LIU Qun, LIU Chong, ZHU Xiao-lei, ZHOU Yu-di, LE Cheng-feng, BAI Jian, HE Yan, BI De-cang, LIU Dong. Analysis of the optimal operating wavelength of spaceborne oceanic lidar[J]. Chinese Optics, 2020, 13(1): 148-155. doi: 10.3788/CO.20201301.0148

Citation:

LIU Qun, LIU Chong, ZHU Xiao-lei, ZHOU Yu-di, LE Cheng-feng, BAI Jian, HE Yan, BI De-cang, LIU Dong. Analysis of the optimal operating wavelength of spaceborne oceanic lidar[J]. Chinese Optics, 2020, 13(1): 148-155. doi: 10.3788/CO.20201301.0148

Citation:

LIU Qun, LIU Chong, ZHU Xiao-lei, ZHOU Yu-di, LE Cheng-feng, BAI Jian, HE Yan, BI De-cang, LIU Dong. Analysis of the optimal operating wavelength of spaceborne oceanic lidar[J]. Chinese Optics, 2020, 13(1): 148-155. doi: 10.3788/CO.20201301.0148

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Analysis of the optimal operating wavelength of spaceborne oceanic lidar

doi: 10.3788/CO.20201301.0148

1.
College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China
2.
Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
3.
Ocean College, Zhejiang University, Zhoushan 316021, China

Funds:

Supported by the National Key Research and Development Program of China No.2016YFC1400900

National Natural Science Foundation of China No.41775023

More Information

Corresponding author: LIU Chong, E-mail:chongliu78@hotmail.com
Received Date: 26 Mar 2019
Rev Recd Date: 30 Apr 2019
Publish Date: 01 Feb 2020

Abstract

Abstract

Spaceborne lidar is a promising tool for vertical ocean profile detection, which has attracted extensive attention in oceanic optical remote sensing technology. It is essential to evaluate the operating wavelength of spaceborne oceanic lidar to ensure that it is effective. In this paper, the optimal operating wavelength of spaceborne oceanic lidar for the purposes of global ocean detection was analyzed in terms of detection depth and signal-to-noise ratio (SNR). The global distribution of ocean detection depths and the corresponding wavelengths were estimated by using the oceanic optical properties data from MODIS. The SNR was evaluated based on the characteristics of the solar Fraunhofer line. It was found that ocean water with an optimal wavelength of 488 nm accounts for about 70% of the global ocean area and more than 95% of the global ocean area has a detected depth deeper than 0.8 times the depth of the euphotic layer. Furthermore, 70% of background light can be suppressed with a filter against the 0.1 nm bandwidth at the 486.134 nm solar Fraunhofer line and the SNR can be increased by about 5.0% compared to that of the 488 nm. In conclusion, working at 486.134 nm can effectively improve the detection depth and the SNR, so it is the optimal operating wavelength of spaceborne oceanic lidar.
- spaceborne oceanic lidar,
- detection depth,
- solar Fraunhofer line,
- signal to noise ratio,
- operating wavelength

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References(22)

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