研究目的
Investigating the influence of solar illumination on the sensitivity of passive lidar for reception of the scattered laser radiation and determining the lidar operation radius.
研究成果
The passive lidar can detect external radiation in a weakly turbid night atmosphere within a view radius of about 2300 km, depending on the radiation power. Daytime solar illumination reduces the detection distance by an order of magnitude, but the use of an optical narrowband filter can mitigate this effect. The study demonstrates the potential for long-range detection of infrared radiation and over-the-horizon optical communication based on Rayleigh scattering.
研究不足
The model does not account for attenuation due to scattering of solar illumination on the lidar path, variation in the scattering coefficient with altitude, and meteorological conditions. It provides approximate values and requires improvements for more accurate estimates.
1：Experimental Design and Method Selection:
The study uses theoretical models to estimate the power of scattered optical radiation received by passive lidar and the lidar operation radius under different illumination conditions.
2：Sample Selection and Data Sources:
The analysis is based on the propagation of laser beams in the Earth’s atmosphere, with considerations for night-time and daytime conditions.
3：List of Experimental Equipment and Materials:
High-power laser emitters, passive lidars with high-sensitivity radiation receivers based on avalanche photodiodes, and interference optical filters are mentioned.
4：Experimental Procedures and Operational Workflow:
The methodology involves calculating the scattered radiation power and signal-to-noise ratio for lidar measurements under various conditions.
5：Data Analysis Methods:
The study employs theoretical estimates and experimental data comparison to validate the model.
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