Boundary layer scattering measurements with a charge-coupled device camera lidar

Area of Science:

• Atmospheric Science
• Optical Remote Sensing
• Lidar Technology

Background:

• Accurate measurement of atmospheric boundary layer scattering is crucial for understanding atmospheric dynamics.
• Traditional monostatic lidar systems require a large dynamic range, complicating signal processing and increasing costs.
• Developing cost-effective and simpler lidar systems is essential for broader atmospheric research applications.

Purpose of the Study:

• To develop and validate a Charge-Coupled Device (CCD)-based bistatic lidar (CLidar) system.
• To assess the CLidar system's capability in measuring atmospheric boundary layer scattering.
• To evaluate the advantages of the CLidar method over conventional monostatic lidar techniques.

Main Methods:

• Construction of a novel bistatic lidar system utilizing a CCD camera, wide-angle optics, and a laser.
• Employing a side-imaging technique to capture a vertical laser beam, enabling high-altitude resolution.
• Conducting observations at Mauna Loa Observatory, Hawaii, for system validation.

Main Results:

• The CLidar system successfully measured scattering in the atmospheric boundary layer.
• Achieved high-altitude resolution from ground level to the upper boundary layer.
• Demonstrated a significantly reduced dynamic range requirement (approx. 1 order of magnitude) compared to monostatic methods.
• Observations showed excellent agreement with modeled molecular-scattering signals.

Conclusions:

• The CCD-based bistatic lidar (CLidar) is a viable and advantageous alternative for atmospheric boundary layer measurements.
• CLidar offers simplicity, low cost, and improved dynamic range, making it accessible for various research purposes.
• The system's performance was validated through field observations, confirming its accuracy and effectiveness.