Combining water vapor DIAL and rotational Raman lidar for humidity, temperature, and particle measurements with high resolution and accuracy

Andreas Behrendt; Volker Wulfmeyer

doi:10.1117/12.506207

23 December 2003 Combining water vapor DIAL and rotational Raman lidar for humidity, temperature, and particle measurements with high resolution and accuracy

Andreas Behrendt, Volker Wulfmeyer

Author Affiliations +

Proceedings Volume 5154, Lidar Remote Sensing for Environmental Monitoring IV; (2003) https://doi.org/10.1117/12.506207
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

Differential absorption lidar (DIAL) and rotational Raman lidar allow measurements of tropospheric water vapor and temperature, respectively, with very high resolution. So far, these techniques have not yet been combined. In this contribution we present the concept for a lidar system, which employs these two techniques simultaneously and discuss synergetic effects. The combination allows relative humidity profiling with unprecedented resolution and accuracy. In addition, temperature, particle extinction coefficient, and particle backscatter coefficient data measured with rotational Raman lidar can be used to correct the water vapor DIAL data. These corrections are required when gradients in the backscatter ratio exist. We propose to transmit three laser wavelengths and to employ 6 receiver channels. Two infrared wavelengths are transmitted for the water vapor DIAL measurements and one ultraviolet wavelength for the rotational Raman measurements. 3 receiver channels detect the elastic backscatter signals, two channels are used for the detection of the ultraviolet rotational Raman backscatter signals with different temperature-dependency, and one channel is for a temperature-independent rotational Raman backscatter signal which is excited by the off-line infrared laser wavelength.

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Andreas Behrendt and Volker Wulfmeyer "Combining water vapor DIAL and rotational Raman lidar for humidity, temperature, and particle measurements with high resolution and accuracy", Proc. SPIE 5154, Lidar Remote Sensing for Environmental Monitoring IV, (23 December 2003); https://doi.org/10.1117/12.506207

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