UV Raman lidar for fine detection of atmospheric relative humidity profile

Yufeng Wang; Dengxin Hua; Jiandong Mao; Li Wang; Shichun Li; Yaoke Xue

doi:10.1117/12.835986

28 August 2009 UV Raman lidar for fine detection of atmospheric relative humidity profile

Yufeng Wang, Dengxin Hua, Jiandong Mao, Li Wang, Shichun Li, Yaoke Xue

Proceedings Volume 7382, International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging; 738225 (2009) https://doi.org/10.1117/12.835986
Event: International Symposium on Photoelectronic Detection and Imaging 2009, 2009, Beijing, China

Abstract

An ultraviolet Raman lidar system at 354.7nm laser wavelength has been developed to measure the elastic scattering signal and the vibrational Raman scattering signal of N₂ and H₂O for fine-detection of atmospheric humidity profile. A newly spectroscopic filter structured with a high-spectral-resolution grating and two narrow band mirrors are used to separate those backscattering signals finely. The density of humidity is derived from the vibrational Raman scattering signal of N₂ and H₂O, the relative humidity profile is obtained combining with the temperature profile taken simultaneously by Raman temperature lidar. Some preliminary experiments have been carried out in nighttime at Xi'an area, the wator vapor mixture ratio vertical profile is analyzed. The experiments results indicate that a measurement error of the relative humidity less than 10% is obtained within the atmospheric boundary layer under the condition of laser energy of 300mJ and observation time of 10min.

Citation Download Citation

Yufeng Wang, Dengxin Hua, Jiandong Mao, Li Wang, Shichun Li, and Yaoke Xue "UV Raman lidar for fine detection of atmospheric relative humidity profile", Proc. SPIE 7382, International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging, 738225 (28 August 2009); https://doi.org/10.1117/12.835986

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