Simulation of the performance of spaceborne hybrid Doppler wind lidar

Accurately measuring wind field is crucial for weather forecasting, climate and meteorological research, aeronautical flights and wind resource exploitation. Spaceborne Doppler wind lidar has become an important instrument for observing the vertical profile of the global wind field, with the successful operation of Aeolus. The spaceborne hybrid wind lidar uses both direct and coherent detection techniques, taking full advantage of the observational benefits of both methods to detect the global wind field with high resolution. Direct detection technique is used to observe the middle and upper troposphere and lower stratosphere, which are dominated by molecular scattering, while coherent detection technique observes the lower troposphere and the atmospheric boundary layer. The incoherent detection module operates at 355 nm and uses the dual-edge detection technique based on Fabry–Pérot etalon. And the coherent detection module uses heterodyne detection technique operating at 1064 nm. This paper simulates and analyses the key parameters of the spaceborne hybrid wind lidar for future satellite missions. And a method for detecting horizontal wind field based on dual-beam observation was developed to ensure the response of the lidar for wind speed detection in both longitudinal and latitudinal directions.