What question did this study set out to answer?

The aim is to validate the ATLID Level 2a data by comparing it with ground-based lidar measurements.

April 16, 2026

Validation of EarthCARE Atmospheric Lidar (ATLID) using the Asian Dust and aerosol lidar observation Network (AD-Net)

Key Points

The aim is to validate the ATLID Level 2a data by comparing it with ground-based lidar measurements.
Utilized ground-based HSRLs, Raman, and Mie-scattering lidars for validation.
Compared aerosol optical parameters using direct measurements.
Employed statistical comparisons across temporal-spatial regions.
Implemented a data matching method considering air mass trajectories.
Validated extinction coefficients for various aerosol components.
Confirmed the reliability of cloud optical parameters against ground-based data.
Achieved high correlation between ATLID and HSRL measurements.

Abstract

Validation of the ATLID JAXA Level 2a data using ground-based HSRLs, Raman-scattering lidars, and Mie-scattering lidars in AD-Net is described. The ATLID level 2a standard product consists of feature mask, target mask, optical parameters for aerosols and clouds (extinction coefficient, backscattering coefficient, lidar ratio, particle depolarization ratio), and planetary boundary layer height. The ATLID JAXA L2a research product provides extinction coefficients for aerosol components (water soluble, mineral dust, sea salt, black carbon). Direct comparison with the ground-based 355-nm HSRLs and Raman lidars is the basic method for validating the aerosol optical parameters. Statistical comparison will be employed in suitable temporal-spatial regions for feature mask, target mask and cloud optical parameters. A data matching method considering the trajectory of air mass will be also employed. The aerosol component products will be validated with multi-wavelength HSRLs and Raman lidars having more measurement parameters.

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