Aerosol measurements in the tropo- and stratosphere by spectral splitting of Rayleigh and Mie signals within a compact lidar of 1 m3

Jan Froh; Josef Höffner; Alsu Mauer; Thorben H. Mense; Ronald Eixmann; Franz-Josef Lübken; Alexander Munk; Michael Strotkamp; Bernd Jungbluth

doi:10.1117/12.2636289

28 October 2022 Aerosol measurements in the tropo- and stratosphere by spectral splitting of Rayleigh and Mie signals within a compact lidar of 1 m³

Jan Froh, Josef Höffner, Alsu Mauer, Thorben H. Mense, Ronald Eixmann, Franz-Josef Lübken, Alexander Munk, Michael Strotkamp, Bernd Jungbluth

Author Affiliations +

Proceedings Volume 12265, Remote Sensing of Clouds and the Atmosphere XXVII; 122650C (2022) https://doi.org/10.1117/12.2636289
Event: SPIE Remote Sensing, 2022, Berlin, Germany

Conference Poster

Abstract

Doppler lidars with daylight capability are challenging systems because of the small field of view (FOV), spectral filtering, and other additional subsystems required compared to observations at night. A universal Doppler Lidar platform with all the required technologies for automatic operation is assembled. By combining a novel narrow-bandwidth pulsed laser (FWHM ~3 MHz) and a matched interferometer (FWHM ~7.5 MHz) the backscattered signals from molecules and aerosols are separated into two channels within the receiver. By tuning the frequency of the pulsed laser from pulse to pulse with sub-MHz accuracy relative to the interferometer, Doppler-aerosol measurements with largely reduced Rayleigh-signal allow aerosol measurements from ground to ~25 km altitude, including Doppler-wind measurements from the Doppler-shift. The compact lidar (1m^3) is built for automatic 24/7 operation and comprises a novel diode-pumped alexandrite ring-laser, a 50cm-telescope and a receiver for solar background free aerosol measurements. The combination of cost-efficient design and fast assembling of such a system allows the construction of a Doppler Lidar network with identical units. Such a network can address a wide range of horizontal and vertical scales.

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Jan Froh, Josef Höffner, Alsu Mauer, Thorben H. Mense, Ronald Eixmann, Franz-Josef Lübken, Alexander Munk, Michael Strotkamp, and Bernd Jungbluth "Aerosol measurements in the tropo- and stratosphere by spectral splitting of Rayleigh and Mie signals within a compact lidar of 1 m³", Proc. SPIE 12265, Remote Sensing of Clouds and the Atmosphere XXVII, 122650C (28 October 2022); https://doi.org/10.1117/12.2636289

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