Zobrazeno 1 - 10
of 49
pro vyhledávání: '"Yaogai Hu"'
Publikováno v:
Universe, Vol 9, Iss 5, p 229 (2023)
The electron density (Ne), ion density (Ni), and electron temperature (Te) statistics recorded by the DEMETER satellite payload ISL (Instrument Sonde de Langmuir) were used to study the disturbance characteristics of the ionosphere before solid earth
Externí odkaz:
https://doaj.org/article/c4ae19230ab749769ab80dcd2b8cfb18
Publikováno v:
Earth, Planets and Space, Vol 72, Iss 1, Pp 1-13 (2020)
Abstract The generation and evolution of artificial plasma clouds is a complicated process that is strongly dependent on the background environment and release conditions. In this paper, based on a three-dimensional two-species fluid model, the evolu
Externí odkaz:
https://doaj.org/article/f951ee0059c344faa2e7943f0169ab67
Publikováno v:
Remote Sensing, Vol 14, Iss 17, p 4305 (2022)
Ground-based oblique incidence sounding (OIS) is an important means to investigate the ionosphere. As the OIS ionogram is a visual representation of the OIS parameters, such as group distance and maximum usable frequency (MUF), it is of great signifi
Externí odkaz:
https://doaj.org/article/c86c7092a9864abe990b8dfb381aa599
Publikováno v:
AIP Advances, Vol 9, Iss 1, Pp 015221-015221-12 (2019)
High power microwave (HPM) injection into the troposphere to block the chain of chlorofluorocarbons (CFCs) or injection into the stratosphere to promote ozone generation are two feasible methods to artificially affect the ozone number concentration.
Externí odkaz:
https://doaj.org/article/b839baae64e344799a9e5e6e3f3258d2
Autor:
Lehui Wei, Chunhua Jiang, Yaogai Hu, Ercha Aa, Wengeng Huang, Jing Liu, Guobin Yang, Zhengyu Zhao
Publikováno v:
Remote Sensing, Vol 13, Iss 5, p 1010 (2021)
This study presents observations of nighttime spread F/ionospheric irregularities and spread Es at low and middle latitudes in the South East Asia longitude of China sectors during the recovery phase of the 7–9 September 2017 geomagnetic storm. In
Externí odkaz:
https://doaj.org/article/466ed369efea4a0abf982726b5d64e5a
Autor:
Tongxin Liu, Guobin Yang, Zhengyu Zhao, Yi Liu, Chen Zhou, Chunhua Jiang, Binbin Ni, Yaogai Hu, Peng Zhu
Publikováno v:
Sensors, Vol 20, Iss 9, p 2664 (2020)
This paper describes a novel sounding system for which the functions of the medium frequency (MF) radar and the ionosonde are integrated on the same hardware platform and antenna structure, namely the middle atmosphere-ionosphere (MAI) system. Unlike
Externí odkaz:
https://doaj.org/article/29d6c19abc95432982fb1dcbdf88a13d
Publikováno v:
Remote Sensing, Vol 12, Iss 3, p 499 (2020)
In this paper, a new dedicated multi-channel ionospheric oblique backscatter sounder is described. A miniaturized L-shaped antenna array was employed for the receiving of the oblique backscatter echoes in the present system. Firstly, two typical adap
Externí odkaz:
https://doaj.org/article/3651913db4cf4217a8ff9e7e590c05b3
Publikováno v:
Sensors, Vol 19, Iss 4, p 779 (2019)
In this paper, complete complementary code (CCC) sequences are applied to a High Frequency (HF) ionospheric sounding network. Ionosondes distributed at multiple locations use the mutually orthogonal CCC sequences to conduct vertical soundings synchro
Externí odkaz:
https://doaj.org/article/6dda265c88b448a3b3442b32ea4f4ea9
Autor:
Guobin Yang, Wuyong Zhang, Yaogai Hu, Chunhua Jiang, Ting Lan, Tongxin Liu, Zhengyu Zhao, Xiaoli Zhu
Publikováno v:
IEEE Geoscience and Remote Sensing Letters. 19:1-5
Improving the quality of the oblique sounding ionogram under the low transmit power and miniaturized antenna array structure has always been a meaningful research content. Here we try to use the adaptive beamforming technology combined with Wuhan Mul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e2359c051ec645d614d17411b7f23a38
https://doi.org/10.1109/lgrs.2021.3095910
https://doi.org/10.1109/lgrs.2021.3095910
Publikováno v:
IEEE Geoscience and Remote Sensing Letters. 18:48-52
A novel land-based high-frequency (HF) geolocation system is proposed. The geolocating signals are transmitted from the stations with known geographic coordinates. Because of the ionospheric refraction, the signals propagate as skywave in the over-th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5453f01d74cc36d78a99152e81d8f9c0
https://doi.org/10.1109/lgrs.2020.2966245
https://doi.org/10.1109/lgrs.2020.2966245