This repository contains the fitted parameters from our proposed log-jet decomposition method applied to 50 years (1971–2020) of ERA5 data at the FINO1 station. The method represents each wind profile using two components: Log component: defined by two parameters (u*, z0) Jet component: defined by three parameters (Um, zm, and S) Please refer to the accompanying paper for methodological details. The data is stored in a single NetCDF file: FINO1_llj_analysis_data.nc.We also provide bias-corrected data using quantile mapping, calibrated against LiDAR observations from 2015–2016. An accompanying Jupyter notebook demonstrates how to read the data and reconstruct wind profiles from the fitted parameters.