Cloud height and thickness measurement based on a superconducting nanowire single-photon detector

Area of Science:

• Atmospheric Science
• Optical Remote Sensing
• Photonics

Background:

• Traditional methods for measuring cloud height and thickness rely on micro-pulse lidar and microwave radiometer data.
• Accurate cloud profiling is crucial for meteorological forecasting and climate modeling.

Purpose of the Study:

• To introduce and evaluate a novel lidar system incorporating a superconducting nanowire single-photon detector (SNSPD) for cloud height and thickness analysis.
• To demonstrate the feasibility and accuracy of using SNSPDs in lidar for atmospheric measurements.

Main Methods:

• A lidar system equipped with a 1.2-m telescope and a 1064 nm near-IR pulse laser was utilized.
• A 4-pixel SNSPD array detector served as the primary receiver for echo photon detection.
• Laser ranging principles were applied to analyze the received photon data for cloud profiling.

Main Results:

• The system successfully measured cloud bottom height (1222 m), cloud top height (1394 m), and cloud thickness (172 m).
• The measured cloud thickness showed a small difference of 28 m compared to forecast values.
• The experimental data demonstrated the system's capability to accurately determine cloud cover characteristics.

Conclusions:

• The application of SNSPDs in lidar systems represents a significant advancement for cloud height and thickness measurement.
• This novel approach provides true and credible data, enhancing the accuracy of atmospheric profiling.
• The developed lidar system shows great potential for improving meteorological observations and climate studies.