NASA Logo in the header
Sciences and Exploration Directorate
Operational

Cloud Physics Lidar (CPL)

The Cloud Physics Lidar, or CPL, is a airborne backscatter lidar designed to operate simultaneously at three wavelengths: 1064, 532, and 355 nm. The CPL flies on high-altitude research aircraft, such as the ER-2 or WB-57. The purpose of the CPL is to provide multiwavelength measurements of cirrus, subvisual cirrus, and aerosols with high temporal and spatial resolution. The CPL utilizes state-of-art technology with a high repetition rate, low pulse energy laser and photon-counting detection. Vertical resolution of the CPL measurements is fixed at 30 m; horizontal resolution can vary but is typically about 200 m. From a fundamental measurement of 180-degree volume backscatter coefficients, various data products are derived, including time-height cross-section images; cloud and aerosol layer boundaries; optical depth for clouds, aerosol, and planetary boundary layer; and extinction profiles.

Launch Date

August 2000

Class

--

Website

Key Staff

The Cloud Physics Lidar, or CPL, is a airborne backscatter lidar designed to operate simultaneously at three wavelengths: 1064, 532, and 355 nm. The CPL flies on high-altitude research aircraft, such as the ER-2 or WB-57. The purpose of the CPL is to provide multiwavelength measurements of cirrus, subvisual cirrus, and aerosols with high temporal and spatial resolution. The CPL utilizes state-of-art technology with a high repetition rate, low pulse energy laser and photon-counting detection. Vertical resolution of the CPL measurements is fixed at 30 m; horizontal resolution can vary but is typically about 200 m. From a fundamental measurement of 180-degree volume backscatter coefficients, various data products are derived, including time-height cross-section images; cloud and aerosol layer boundaries; optical depth for clouds, aerosol, and planetary boundary layer; and extinction profiles.

Related Publications

2025. "Evaluation of Physical Microphysical Property Retrieval Algorithms during the 2020 IMPACTS Field Campaign.", Journal of Atmospheric and Oceanic Technology, 42 (2): 167-186 [10.1175/jtech-d-23-0106.1] [Journal Article/Letter]

2020. "A Classification of Ice Crystal Habits Using Combined Lidar and Scanning Polarimeter Observations during the SEAC4RS Campaign.", Journal of Atmospheric and Oceanic Technology, 37 (12): 2185-2196 [10.1175/jtech-d-20-0037.1] [Journal Article/Letter]

2020. "Sensitivities in Satellite Lidar‐Derived Estimates of Daytime Top‐of‐the‐Atmosphere Optically Thin Cirrus Cloud Radiative Forcing: A Case Study.", Geophysical Research Letters, 47 (17): [10.1029/2020gl088871] [Journal Article/Letter]

2020. "Air pollution inputs to the Mojave Desert by fusing surface mobile and airborne in situ and airborne and satellite remote sensing: A case study of interbasin transport with numerical model validation.", Atmospheric Environment, 224 117184 [10.1016/j.atmosenv.2019.117184] [Journal Article/Letter]