Cloud-top and cloud-base height products from active–passive synergistic observations of DPC and ACDL onboard the DaQi-1 satellite (2023)

Meanwhile, cloud optical properties derived from DPC observations are incorporated into the retrieval process as physical constraints to improve the accuracy and physical consistency of the retrieved cloud vertical structure parameters.The CTH and CBH parameters provided in this dataset are of significant scientific value for investigating cloud vertical development, cloud–aerosol interactions, and the long-term climate feedbacks of clouds.

Independent global validation using observations from the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) and the co-platform ACDL demonstrates the robustness of this dataset under various cloud conditions and observation scenarios. The correlation coefficients between the retrieved CTH and independent observations range from 0.68 to 0.87, while those for CBH range from 0.70 to 0.86. The mean biases for CTH and CBH are −0.65 to +0.02 km and −0.61 to −0.04 km, respectively.

This dataset is organized by satellite observation orbit and stored in NetCDF format. Each data file corresponds to one DPC observation orbit of the DQ-1 satellite and contains CTH and CBH products, together with associated geolocation information and auxiliary observation parameters.