Atmospheric Measurement Techniques
Atmospheric Measurement Techniques
AMT
Articles | Volume 19, issue 15
Articles | Volume 19, issue 15
https://doi.org/10.5194/amt-19-5325-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-19-5325-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 19, issue 15
Research article
 | 
13 Aug 2026
Research article |  | 13 Aug 2026

Polarization calibration of spaceborne lidar using dense cirrus–scattered solar background with molecular scattering correction

Zhaoyan Liu, Mark A. Vaughan, Pengwang Zhai, Anne Emilie Garnier, Shan Zeng, Sharon D. Rodier, Yongxiang Hu, Ali H. Omar, and Charles R. Trepte

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Short summary
Accurate polarization calibration is vital for spaceborne lidars. Optically Thick Ice Cloud (OTIC)-based calibration enables semi-continuous daytime calibration, but molecular scattering at shorter wavelengths biases the signal. We introduce a vector radiative transfer-based Molecular Scattering Correction (MSC) and validate it using the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP), eliminating ~ 1% daytime bias at 532 nm. MSC is essential for the Atmospheric Lidar (ATLID) at 355 nm.
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