Ca+ Resonance Fluorescence Lidar Observations and Density Retrieval Products at Fuke Station, Hainan

This dataset supports the manuscript “High-Resolution Density Retrieval Algorithm and Observational Validation for a Low-Latitude Ca+ Resonance Fluorescence Lidar.” It contains Ca+ resonance-fluorescence lidar observations obtained at Fuke Station, Danzhou, Hainan, China (19.51°N, 109.46°E), on 25 October 2024 and 9 August 2025. The dataset includes photon-count measurements and derived data products used in the study, including retrieved Ca+ number-density profiles and column abundances over selected altitude ranges.

These data support the representative observational results presented in the manuscript, including E-region layered structures, descending Ca+ structures in the valley region, and EPB-like structures extending into the F region.