Articles | Volume 32, issue 4
https://doi.org/10.5194/angeo-32-465-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/angeo-32-465-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
A new inversion algorithm for backscatter ionogram and its experimental validation
J. J. Zhao
Ionosphere Laboratory, School of Electronic Information, Wuhan University, Wuhan, Hubei 430072, China
Ionosphere Laboratory, School of Electronic Information, Wuhan University, Wuhan, Hubei 430072, China
G. B. Yang
Ionosphere Laboratory, School of Electronic Information, Wuhan University, Wuhan, Hubei 430072, China
C. H. Jiang
Ionosphere Laboratory, School of Electronic Information, Wuhan University, Wuhan, Hubei 430072, China
S. S. Chang
Ionosphere Laboratory, School of Electronic Information, Wuhan University, Wuhan, Hubei 430072, China
P. Zhu
Ionosphere Laboratory, School of Electronic Information, Wuhan University, Wuhan, Hubei 430072, China
X. D. Gu
Ionosphere Laboratory, School of Electronic Information, Wuhan University, Wuhan, Hubei 430072, China
B. B. Ni
Ionosphere Laboratory, School of Electronic Information, Wuhan University, Wuhan, Hubei 430072, China
Z. Y. Zhao
Ionosphere Laboratory, School of Electronic Information, Wuhan University, Wuhan, Hubei 430072, China
Related authors
No articles found.
Mei Li, Zhuangkai Wang, Chen Zhou, Handong Tan, and Meng Cao
Nat. Hazards Earth Syst. Sci. Discuss., https://doi.org/10.5194/nhess-2024-94, https://doi.org/10.5194/nhess-2024-94, 2024
Preprint under review for NHESS
Short summary
Short summary
In order to check the relationship between ground-based electromagnetic anomaly and ionospheric effect before the famous Wenchuan MS 8.0 earthquake, three physical models have been established to simulate the communication process of electromagnetic energy from the Wenchuan hypocenter to the Earth’s surface, via the atmosphere to the ionosphere to cause ionospheric variations.
Qiong Tang, Chen Zhou, Huixin Liu, Yi Liu, Jiaqi Zhao, Zhibin Yu, Zhengyu Zhao, and Xueshang Feng
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2022-534, https://doi.org/10.5194/acp-2022-534, 2022
Preprint withdrawn
Short summary
Short summary
The geomagnetic and solar effect on Es is studied. The negative correlation between Es and geomagnetic activity at mid-latitude is related to the decreased meteor rate during storm period. The increased Es occurrence in high latitude relates to the changing electric field. The positive correlation between Es and solar activity at high latitude is due to the enhanced IMF in solar maximum. The negative correlation in mid and low latitudes relates to the decreased meteor rate during solar activity.
Shufan Zhao, XuHui Shen, Zeren Zhima, and Chen Zhou
Ann. Geophys., 38, 969–981, https://doi.org/10.5194/angeo-38-969-2020, https://doi.org/10.5194/angeo-38-969-2020, 2020
Short summary
Short summary
We use satellite data to analyze precursory anomalies of the western China Ms 7.1 Yushu earthquake by analyzing the signal-to-noise ratio (SNR) and using the full-wave model to illustrate a possible mechanism for how the anomalies occurred. The results show that very low-frequency (VLF) radio wave SNR in the ionosphere decreased before the Yushu earthquake. The full-wave simulation results confirm that electron density variation in the lower ionosphere will affect VLF radio signal SNR.
Yi Liu, Chen Zhou, Qiong Tang, Guanyi Chen, and Zhengyu Zhao
Ann. Geophys., 37, 337–345, https://doi.org/10.5194/angeo-37-337-2019, https://doi.org/10.5194/angeo-37-337-2019, 2019
Short summary
Short summary
Underground nuclear explosion (UNE) can produce ionospheric disturbances through a lithosphere–atmosphere–ionosphere coupling mechanism, which is very similar with earthquakes. By using the total electron content observations and Swarm ionospheric current data, we have investigated the geomagnetic conjugate ionospheric disturbances. We proposed that the electric field generated during the UNE test can be an important mechanism for ionospheric disturbance.
Jiaqi Zhao and Chen Zhou
Ann. Geophys., 37, 263–271, https://doi.org/10.5194/angeo-37-263-2019, https://doi.org/10.5194/angeo-37-263-2019, 2019
Moran Liu, Chen Zhou, Xiang Wang, Bin Bin Ni, and Zhengyu Zhao
Ann. Geophys., 36, 855–866, https://doi.org/10.5194/angeo-36-855-2018, https://doi.org/10.5194/angeo-36-855-2018, 2018
Zhengping Zhu, Weihua Luo, Jiaping Lan, and Shanshan Chang
Ann. Geophys., 35, 763–776, https://doi.org/10.5194/angeo-35-763-2017, https://doi.org/10.5194/angeo-35-763-2017, 2017
Short summary
Short summary
Features of planetary waves in Chinese low-latitude regions are investigated. Planetary waves are observed in both MLT winds and ionospheric vertical drifts. ESF occurrence is with the uplift of the F layer caused by PRE, and a delay of about 6 days is observed for planetary waves propagating from the lower atmosphere to the ionosphere. This investigation contributes to the understanding of atmosphere–ionosphere coupling processes and the effects of planetary waves on ESF.
Xiang Xu, Chen Zhou, Run Shi, Binbin Ni, Zhengyu Zhao, and Yuannong Zhang
Ann. Geophys., 34, 815–829, https://doi.org/10.5194/angeo-34-815-2016, https://doi.org/10.5194/angeo-34-815-2016, 2016
Short summary
Short summary
ULF waves can be generated by modulated HF heating in the ionospheric F region, which has long been considered for secure communication with submarines. In this paper we study the effects of background parameters on the process of ULF wave generation and propagation by using a numerical simulation. We find that wave radiation efficiency is higher in the daytime ionosphere at lower latitudes, while ground wave intensity is larger in the nighttime ionosphere with lower modulation frequency.
Zheng Xiang, Binbin Ni, Chen Zhou, Zhengyang Zou, Xudong Gu, Zhengyu Zhao, Xianguo Zhang, Xiaoxin Zhang, Shenyi Zhang, Xinlin Li, Pingbing Zuo, Harlan Spence, and Geoffrey Reeves
Ann. Geophys., 34, 493–509, https://doi.org/10.5194/angeo-34-493-2016, https://doi.org/10.5194/angeo-34-493-2016, 2016
Short summary
Short summary
We used 14 satellites(GOES, POES, THEMIS, RBSP, FENGYUN, REPTile) measurement to investigate the loss mechanisms of a electron dropout event during a intense solar wind dynamic pressure pulse. The observations demonstrated that magnetopause shadowing and atmospheric loss both play important roles in electron flux dropout. Moreover, substrom injections and convection strongly enhanced the energetic electron fluxes, which may delay other than avoid the occurrence of electron flux dropout.
C. Zhou, H. Qing, G. Chen, X. Gu, B. Ni, G. Yang, Y. Zhang, and Z. Zhao
Atmos. Meas. Tech. Discuss., https://doi.org/10.5194/amtd-7-11901-2014, https://doi.org/10.5194/amtd-7-11901-2014, 2014
Revised manuscript not accepted
Short summary
Short summary
Wuhan atmosphere radio exploration (WARE) radar is the first Mesosphere- -Stratosphere-Troposphere (MST) radar that becomes operative in the mainland of China and is dedicated to real-time atmospheric observations. We present the main configurations and initial results in this paper.The results can be very significant for analyzing the atmospheric characteristics in mid-latitude China and contributing to the worldwide MST community.
S. S. Chang, B. B. Ni, J. Bortnik, C. Zhou, Z. Y. Zhao, J. X. Li, and X. D. Gu
Ann. Geophys., 32, 507–518, https://doi.org/10.5194/angeo-32-507-2014, https://doi.org/10.5194/angeo-32-507-2014, 2014