Journal of atmospheric electricity最新文献_第5页

A network of reception of over-horizon VHF signals associated with earthquakes and some preliminary results 一个接收与地震有关的超视距甚高频信号的网络和一些初步结果

Journal of atmospheric electricity Pub Date : 1900-01-01 DOI: 10.1541/JAE.25.19

M. Hayakawa, T. Gotoh, M. Ikeda

引用次数: 2

RELATION BETWEEN INTERMEDIATE IONS AND METEOROLOGICAL FACTORS 中间离子与气象因子的关系

Journal of atmospheric electricity Pub Date : 1900-01-01 DOI: 10.1541/JAE.4.49

H. Kojima

引用次数: 4

Analysis of the relationship between the earthquake and the GPS positioning error 地震与GPS定位误差的关系分析

Journal of atmospheric electricity Pub Date : 1900-01-01 DOI: 10.1541/JAE.34.41

Kyohei Takahashi, N. Haga, K. Motojima

引用次数: 0

FURTHER DIRECTION FINDING EVIDENCE ON DUCTED PROPAGATION OF LOW-LATITUDE DAYTIME WHISTLERS 低纬度日间哨声管道传播的进一步测向证据

Journal of atmospheric electricity Pub Date : 1900-01-01 DOI: 10.1541/JAE.5.35

M. Hayakawa, Kenji Ohta, Yoshihito Tanaka

引用次数: 2

Development of ELF Band Receiver of Detecting Extreme Low Frequency Magnetic Flux Variation Due to Earthquakes 探测地震极低频磁通变化的极低频波段接收机的研制

Journal of atmospheric electricity Pub Date : 1900-01-01 DOI: 10.1541/JAE.30.37

M. Hata, I. Takumi, K. Ohta, J. Izutsu, T. Fujii, Tokiyasu Sato, S. Yahashi, N. Watanabe

引用次数: 2

Soil radon flux fluctuation near the ground surface:Relationship with heavy precipitation 近地表土壤氡通量波动:与强降水的关系

Journal of atmospheric electricity Pub Date : 1900-01-01 DOI: 10.1541/jae.40.37

Kazuhide Nemoto, Kojima Haruna, C. Yoshino, Shu Kaneko, Akitsugu Kitade, K. Hattori, T. Mogi, Toshiharu Konishi

引用次数: 0

Observations of anomalous propagation of VHF radio wave due to sporadic-E and tropospheric duct in Hiroshima and Aso 广岛和阿索地区因散射e和对流层导管引起的甚高频无线电波异常传播观测

Journal of atmospheric electricity Pub Date : 1900-01-01 DOI: 10.1541/JAE.32.25

K. Shin, M. Nishi, Teruaki Yoshida

{"title":"Observations of anomalous propagation of VHF radio wave due to sporadic-E and tropospheric duct in Hiroshima and Aso","authors":"K. Shin, M. Nishi, Teruaki Yoshida","doi":"10.1541/JAE.32.25","DOIUrl":"https://doi.org/10.1541/JAE.32.25","url":null,"abstract":"In non line-of-sight VHF radio wave observation, anomalous propagations due to ionospheric sporadic-E (Es propagation) and tropospheric duct (tropospheric ducting) have been frequently observed. They are known to cause an interference problem in the television, radio broadcasts and wireless communications, so that it is important to understand them. In order to make clear the characteristics of the anomalous propagations, we have observed over-horizon FM radio waves in VHF band for six years in Hiroshima and Aso. For analyses of large amounts of data set observed over years, it is important to classify and extract the radio waves automatically. In this paper, we show a method to classify above two anomalous propagations automatically. Procedures of the method are based on their propagation characteristics and received signal strength. Further the anomalous propagations and broadband noises are separated using dual frequency method. In order to evaluate the method, we examined the occurrence of the Es propagation and tropospheric ducting detected by the above method using the data observed from 2005 to 2010. It was found that the Es propagations were mostly observed in summer season and more frequently observed months in a year were June and July. Further, they were frequently observed from 10 to 12 and from 16 to 18 o’clock in a day. These results had the same tendency as past observations at mid-latitude. On the other hand, the tropospheric ducting was observed from night to morning time in spring and fall at Aso observatory. These results were consistent with past observations of occurrences of inversion layer in the troposphere from fall to spring. In contrast, it was confirmed that there were few tropospheric ducting in summer season while the past observations reported the inversion layer occurred. Since propagation characteristics of the FM radio waves have been clearly shown, it was confirmed that the classification method worked effectively.","PeriodicalId":274637,"journal":{"name":"Journal of atmospheric electricity","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121442297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Ternary homogenous nucleation by negative corona discharge in NH3/SO2/H2O/Air mixtures 负电晕放电在NH3/SO2/H2O/Air混合物中的三元均形核

Journal of atmospheric electricity Pub Date : 1900-01-01 DOI: 10.1541/JAE.31.1

K. Nagato

引用次数: 0

Variation in the D-region ionosphere after the 2015 Nepal earthquake using LF transmitter signals 2015年尼泊尔地震后d区电离层的低频发射信号变化

Journal of atmospheric electricity Pub Date : 1900-01-01 DOI: 10.1541/jae.40.1

Tekkan Akashi, H. Ohya, F. Tsuchiya, K. Nozaki, H. Nakata

{"title":"Variation in the D-region ionosphere after the 2015 Nepal earthquake using LF transmitter signals","authors":"Tekkan Akashi, H. Ohya, F. Tsuchiya, K. Nozaki, H. Nakata","doi":"10.1541/jae.40.1","DOIUrl":"https://doi.org/10.1541/jae.40.1","url":null,"abstract":". We report variation in the D-region ionosphere after the 2015 Nepal earthquake using low-frequency (LF) transmitter signals. The Nepal earthquake (Mw 7.8) occurred at 6:11:26 UT on April 25, 2015. In this study, we used the BPC (China, 68.5 kHz)-Takine (TKN, Japan) LF radio wave propagation path, which has a great circle distance between the epicenter and the LF propagation path of 3,025 km. The observed periods of variation in the LF amplitude and phase were 100-300 s. The observed variation in the LF amplitude and phase was approximately +/-0.1 dB and +/-1°, respectively. The vertical velocity of the ground oscillation near the midpoint of the LF propagation path had a similar period to the LF waves. The Rayleigh wave spread concentrically from the epicenter to the LF path, and then the acoustic waves propagated vertically at the midpoint of the LF path from the Earth’s surface to the D-region ionosphere height. The maximum coherences between the LF amplitude and vertical seismic velocity, and between the LF phase and vertical seismic velocity were 0.90 (period: 146 s) and 0.77 (256 s), respectively, which were both significant at the 95% confidence level. The variation in the LF amplitude and phase was caused by acoustic waves excited by the Rayleigh wave.","PeriodicalId":274637,"journal":{"name":"Journal of atmospheric electricity","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122332002","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A study on progress process of lightning discharge with long lightning channels 长闪电通道闪电放电过程的研究

Journal of atmospheric electricity Pub Date : 1900-01-01 DOI: 10.1541/jae.40.32

Takahiro Tajiri, T. Morimoto, Y. Nakamura, H. Sakai, Y. Takayanagi, M. Shimizu

引用次数: 1