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A Case Study of the Daytime Intense Radar Backscatter and Strong Ionospheric Scintillation Related to the Low-Latitude E-Region Irregularities
Alternative TitleWOS:000556880400011
Chen, Gang; Wang, Zhihua; Jin, Han1; Yan, Chunxiao1; Zhang, Shaodong; Feng, Jian2; Gong, Wanlin; He, Zhiqiu
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
2020
Volume125Issue:7Pages:e2019JA027532
DOI10.1029/2019JA027532
ISSN2169-9380
Language英语
Keywordelectron density gradient field-aligned irregularity ionospheric scintillation low latitude wind shear FIELD-ALIGNED IRREGULARITIES SPORADIC-E LAYERS PIURA VHF RADAR STATISTICAL CHARACTERISTICS GRAVITY-WAVE GADANKI RADAR MECHANISM INSTABILITY GENERATION IONOSONDE
AbstractThe special daytime echoes, which present the V-shaped echo pattern between 90-180 km ranges in the range-time-intensity (RTI) plot, were occasionally recorded by the Hainan coherent scatter phased array radar (HCOPAR) located at the low latitude of China. Four cases with distinct echo traces are presented to display the common characteristics of the V-shaped echoes. They usually occur between 10:00-15:00 LT in the daytime with the enhanced top frequency and blanketing frequency of Es layer (f(t)Es andf(b)Es). Their left/right wings present negative/positive Doppler velocity. A case on 16 August 2015 was investigated by the joint observation of the HCOPAR, the Hainan Digisonde, and a scintillation receiver. The echo spectra show that the V-shaped echoes were backscattered from the type 2 irregularities. The formation of the V-shaped echo pattern was due to the leakage of the antenna sidelobe for the very intense scatter from Es layer. The irregularities were found traveling westward with the velocity of 41.12 +/- 2.08 m/s. While the occurrence of the intense irregularities, there were periodic peaks appearing on thef(t)Es andf(b)Es curves, and the maximumf(t)Es-f(b)Es reached 10.31 MHz. At the same time, the strong ionospheric scintillation event was recorded by the scintillation receiver. The wind shear is considered to produce the sharp density gradient in the Es plasma and then induce the gradient drift instability. The large-scale gravity waves have the possibility to induce the E-region wind shear.
Indexed BySCI
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Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/7498
Collection中国科学院国家空间科学中心
Affiliation1.Wuhan Univ, Elect Informat Sch, Wuhan, Peoples R China
2.Chinese Acad Sci, Natl Space Sci Ctr, Beijing, Peoples R China
3.China Res Inst Radiowave Propagat, Qingdao, Peoples R China
Recommended Citation
GB/T 7714
Chen, Gang,Wang, Zhihua,Jin, Han,et al. A Case Study of the Daytime Intense Radar Backscatter and Strong Ionospheric Scintillation Related to the Low-Latitude E-Region Irregularities[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2020,125(7):e2019JA027532.
APA Chen, Gang.,Wang, Zhihua.,Jin, Han.,Yan, Chunxiao.,Zhang, Shaodong.,...&He, Zhiqiu.(2020).A Case Study of the Daytime Intense Radar Backscatter and Strong Ionospheric Scintillation Related to the Low-Latitude E-Region Irregularities.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,125(7),e2019JA027532.
MLA Chen, Gang,et al."A Case Study of the Daytime Intense Radar Backscatter and Strong Ionospheric Scintillation Related to the Low-Latitude E-Region Irregularities".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 125.7(2020):e2019JA027532.
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