Photonics Seminar

Wind profiling with Doppler lidar

Maciej Karasewicz, Iwona Stachlewska

Instytut Geofizyki, Wydział Fizyki, Uniwersytet Warszawski


March 14, 2024, 12:15 p.m., ul. Pasteura 5, sala 1.02

Remote sensing of winds in Earth’s atmosphere can be performed with high spatial and temporal resolution using Doppler lidar. The fundamentals of the measurement are based on the doppler effect - electromagnetic radiation with the fixed frequency is emitted, then the backscattered radiation by aerosols and droplets is measured as the frequency shift corresponding to the relative speed between the source and the target.
During seminar, the principles of operation of the Streamline XR (Halo Photonics) lidar will be presented. It consist of a solid-state pulsed laser emitting at 1500 nm wavelength and a heterodyne detection unit. Fundamentals of the doppler lidar techniques will be given, focusing on the instrumentation scheme, detection modes, operational routines and system settings that need to be set according to the planned applications. The examples of applications and data products will be also shown. The lidar belongs to the Remote Sensing Laboratory (RS-Lab) at the Atmospheric Physics Department of the Institute of Geophysics, Physics Faculty, University of Warsaw. Lidar is installed at the roof-platform of RS-Lab and as such it serves also as a part of CLOUDNET-ACTRIS Research Infrastructure. Its use is facilitated in several NCN projects (e.g. PURERSENS), EU H2020 projects (e.g. ATMO-ACCESS, RI-URBANS) and ESA (e.g. POLIMOS).


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