Zobrazeno 1 - 10
of 54
pro vyhledávání: '"LiFang Du"'
Autor:
YuChang Xun, ZhiShan Chen, LiFang Du, HaoRan Zheng, Jing Jiao, ZeLong Wang, ShaoHua Gong, GuoTao Yang
Publikováno v:
Earth and Planetary Physics, Vol 8, Iss 5, Pp 753-761 (2024)
From April 2020 to June 2022, a Ca+ lidar with dual-wavelength and narrow-band emitting lasers utilizing all-solid-state technology was employed to conduct observations in Beijing (40.41°N, 116.01°E) for a total duration of 1797.79 hours over 280 n
Externí odkaz:
https://doaj.org/article/4e8f9d28a4a34bb4ab1cc29b8228568b
Autor:
Fenglei Chen, Yuchang Xun, Zelong Wang, Lifang Du, Haoran Zheng, Zhiqing Chen, Xuewu Cheng, Jiqin Wang, Fang Wu, Guotao Yang
Publikováno v:
地球与行星物理论评, Vol 55, Iss 1, Pp 131-137 (2024)
The Phase II of Chinese Meridian Project atmosphere wind-temperature-metal-constituents LiDAR at Mohe (122°E, 53°N) station uses a resonance fluorescence scattering mechanism to detect the metal layer composition in the upper atmosphere at 80-120 k
Externí odkaz:
https://doaj.org/article/95f5f90f3f2f4fe4be0ba5325f5ddf59
Autor:
Kexin Wang, Zelong Wang, Yuxuan Wu, Lifang Du, Haoran Zheng, Jing Jiao, Fang Wu, Yuchang Xun, Yuan Xia
Publikováno v:
Atmosphere, Vol 15, Iss 3, p 344 (2024)
Lidar observations of metal layers play a significant role in research on the chemistry and dynamics of the mesosphere and lower thermosphere. This work reports on Fe lidar observations conducted in Beijing and Mohe. Utilizing the same laser emission
Externí odkaz:
https://doaj.org/article/e4dd2300dd5448ad996f081a4be5f189
Publikováno v:
IET Intelligent Transport Systems, Vol 16, Iss 11, Pp 1489-1503 (2022)
Abstract To achieve the intelligent perception of traffic video and overcome the dispersion of computing modules and the separation processing of multiple tasks, efficient chained centre network (ECCNet) is proposed as a unified framework, accomplish
Externí odkaz:
https://doaj.org/article/7fa5226474504f01a028d137c0193180
Autor:
Yuchang Xun, Peng Zhao, Zelong Wang, Lifang Du, Jing Jiao, Zhishan Chen, Haoran Zheng, Shaohua Gong, Guotao Yang
Publikováno v:
Remote Sensing, Vol 16, Iss 3, p 596 (2024)
In March 2020, an all-solid-state dual-wavelength narrow-band lidar system was deployed. A total of 226 nights spanning from March 2020 to July 2022 were employed in order to investigate the seasonal variations of calcium atoms and ions in the mesosp
Externí odkaz:
https://doaj.org/article/26ff512a247a432f9165b621c020a545
Autor:
Junfeng Wei, Linmei Liu, Xuewu Cheng, Yi Fan, Weiqiang Zhan, Lifang Du, Wei Xiong, Zhaoxiang Lin, Guotao Yang
Publikováno v:
Remote Sensing, Vol 16, Iss 3, p 536 (2024)
A prediction system was developed to determine the maximum Rayleigh altitude (MRA) by improving the automated detection of LIDAR power-on conditions and adapting to advancements in middle- and upper-atmosphere LIDAR technology. The proposed system wa
Externí odkaz:
https://doaj.org/article/317ea45a8f244edba6c84c15d9e76ce1
Autor:
Yuan Xia, Xuewu Cheng, Zelong Wang, Linmei Liu, Yong Yang, Lifang Du, Jing Jiao, Jihong Wang, Haoran Zheng, Yajuan Li, Faquan Li, Guotao Yang
Publikováno v:
Remote Sensing, Vol 15, Iss 21, p 5140 (2023)
Based on the resonance fluorescence scattering mechanism, a narrowband sodium (Na) lidar can measure temperature and wind in the mesosphere and lower thermosphere (MLT) region. By using a narrowband spectral filter, background light noise during the
Externí odkaz:
https://doaj.org/article/8e07e5b012054bc491886c496d10411b
Autor:
Lifang Du, Haoran Zheng, Chunlei Xiao, Xuewu Cheng, Fang Wu, Jing Jiao, Yuchang Xun, Zhishan Chen, Jiqin Wang, Guotao Yang
Publikováno v:
Remote Sensing, Vol 15, Iss 18, p 4566 (2023)
We report an all-solid-state narrowband lidar system for the simultaneous detection of Ca and Ca+ layers over Yanqing (40.41°N, 116.01°E). The uniqueness of this lidar lies in its transmitter, which is based on optical parametric oscillation (OPO)
Externí odkaz:
https://doaj.org/article/283cd1ae8c204a59b7752889b9546da3
Autor:
Jing Jiao, Xinzhao Chu, Han Jin, Zelong Wang, Yuchang Xun, Lifang Du, Haoran Zheng, Fuju Wu, Jiyao Xu, Wei Yuan, Chunxiao Yan, Jihong Wang, Guotao Yang
Publikováno v:
Geophysical Research Letters, Vol 49, Iss 18, Pp n/a-n/a (2022)
Abstract We report a world record of lidar profiling of metallic Ca+ ions up to 300 km in the midlatitude nighttime ionosphere during geomagnetic quiet time. Ca+ measurements (∼80–300 km) were made over Beijing (40.42°N, 116.02°E) with an Optic
Externí odkaz:
https://doaj.org/article/174dce078fb349c7ad5bbbd98473f429
Publikováno v:
Atmosphere, Vol 14, Iss 8, p 1283 (2023)
Resonance fluorescence scattering is the physical mechanism with which lidar detects atmospheric metal layers. The resonance fluorescence scattering cross section is an important parameter for lidar data processing. In this work, the resonance fluore
Externí odkaz:
https://doaj.org/article/c0632d4f4bf34cd5b8ced23feddec880