Proceedings of the Institute of Radio Engineers最新文献_第2页

Radio Observations of the Bureau of Standards during the Solar Eclipse of August 31, 1932 1932年8月31日日食期间标准局的无线电观测

Proceedings of the Institute of Radio Engineers Pub Date : 2017-10-28 DOI: 10.1109/jrproc.1934.227896

S. S. Kirby, L. Berkner, T. R. Gilliland, K. Norton

{"title":"Radio Observations of the Bureau of Standards during the Solar Eclipse of August 31, 1932","authors":"S. S. Kirby, L. Berkner, T. R. Gilliland, K. Norton","doi":"10.1109/jrproc.1934.227896","DOIUrl":"https://doi.org/10.1109/jrproc.1934.227896","url":null,"abstract":"Radio observations of the heights of the several layers of the ionosphere were made at Washington, D.C., and Sydney, Nova Scotia, by the pulse method during the afternoon of the solar eclipse of August 31, 1932, and during the afternoons of several days preceding and following. At Washington three separate groups of determinations were made: (1) Measurements of the maximum ionization of the E layer during the afternoon; (2) continual series of measurements of virtual height during the afternoon at 4200 kilocycles which was ordinarily just above the F1critical frequency for the ordinary ray; (3) measurements of the critical frequency of the F2layer during the afternoon. At Sydney, determinations similar to (1) were made and continuous records of virtual height were obtained at 2400 and 3000 kilocycles. Separate equipment was used for each of these groups of determinations so that measurements could be made rapidly and continuously. It was found that the ionization of the E layer decreased to about 30 per cent of its normal value at the time of the eclipse maximum, the variation taking place approximately in phase with the eclipse. The ionization of the F1layer likewise decreased in almost exactly the same manner, reaching a value of about 40 per cent of its normal ionization at about the eclipse maximum. When analyzed by the method presented in this paper, observations of other investigators are found to agree well with these results.","PeriodicalId":54574,"journal":{"name":"Proceedings of the Institute of Radio Engineers","volume":"22 1","pages":"247-264"},"PeriodicalIF":0.0,"publicationDate":"2017-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/jrproc.1934.227896","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44690465","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: 7

Preliminary Note on an Automatic Recorder Giving a Continuous Height Record of the Kennelly-Heaviside Layer Kennelly Heaviside层连续高度自动记录仪的注记

Proceedings of the Institute of Radio Engineers Pub Date : 2017-10-28 DOI: 10.1109/JRPROC.1932.227589

T. R. Gilliland, G. W. Kenrick

引用次数: 8

Investigations of Kennelly-Heaviside Layer Heights for Frequencies between 1600 and 8650 Kilocycles per Second 1600 ~ 8650千周/秒频率下Kennelly-Heaviside层高度的研究

Proceedings of the Institute of Radio Engineers Pub Date : 2017-10-27 DOI: 10.1109/jrproc.1932.227522

T. R. Gilliland, G. W. Kenrick, K. Norton

引用次数: 6

Note on a Multifrequency Automatic Recorder of Ionosphere Heights 电离层高度多频自动记录仪的注记

Proceedings of the Institute of Radio Engineers Pub Date : 2017-10-27 DOI: 10.1109/jrproc.1934.227897

T. R. Gilliland

{"title":"Note on a Multifrequency Automatic Recorder of Ionosphere Heights","authors":"T. R. Gilliland","doi":"10.1109/jrproc.1934.227897","DOIUrl":"https://doi.org/10.1109/jrproc.1934.227897","url":null,"abstract":"A system is described which gives a curve of virtual heights of the layers of the ionosphere against frequency. The pulse method of Breit and Tuve is employed with modifications. Short pulses of radio-frequency energy are transmitted, and the time required for the energy to go up and return is recorded automatically by a galvanometer oscillograph of the type previously used for fixed frequency work. The transmitting and receiving sets are shifted in frequency from 2500 to 4400 kilocycles at the uniform rate of 200 kilocycles per minute. Records are presented which show the characteristics for different times of day and night. In the daytime, during the period of these tests, three strata were usually indicated. For the lower range of frequencies, reflections come from the E layer with a virtual height of around 120 kilometers. As frequency is increased the waves pass through the E layer and are returned from the F1layer with virtual heights of the order of 200 kilometers. The frequency for which this transition takes place varies with time of day and with season. In the middle of the day, during these tests, this critical frequency was in the neighborhood of 3000 kilocycles, while the critical frequency for passing through the F1to the F2layer was usually between 3800 and 4100 kilocycles. The F2layer shows virtual heights of 280 kilometers or more.","PeriodicalId":54574,"journal":{"name":"Proceedings of the Institute of Radio Engineers","volume":"22 1","pages":"236-246"},"PeriodicalIF":0.0,"publicationDate":"2017-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/jrproc.1934.227897","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47910277","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: 8

A Method of Providing Course and Quadrant Identification with the Radio Range Beacon System 一种为无线测距信标系统提供航向和象限识别的方法

Proceedings of the Institute of Radio Engineers Pub Date : 2017-10-27 DOI: 10.1109/JRPROC.1934.226688

F. W. Dunmore

引用次数: 0

On the impedance of a vertical half-wave antenna above an earth of finite conductivity 有限导电性大地上垂直半波天线的阻抗

Proceedings of the Institute of Radio Engineers Pub Date : 2013-02-02 DOI: 10.1109/ire.1935.6449185

W. L. Barrow

{"title":"On the impedance of a vertical half-wave antenna above an earth of finite conductivity","authors":"W. L. Barrow","doi":"10.1109/ire.1935.6449185","DOIUrl":"https://doi.org/10.1109/ire.1935.6449185","url":null,"abstract":"The complex impedance of a vertical half-wave antenna located any distance above an earth of given conductivity and dielectric constant is calculated by the “induced electromotive force” method. Based on the assumption k<inf>0</inf>≪ |k| (where k<inf>0</inf> and k are the wave numbers for the atmosphere and earthy respectively), the results are applicable down to about 10 meters for any earth except a very dry soil. The calculation is based on the Sommerfeld-von Hoerschlemann expression for the field of a dipole above a half space of arbitrary electrical character. After splitting the total impedance into three parts, Z = Z<inf>1</inf> + Z<inf>2</inf> + Z<inf>3</inf>, the component Z<inf>1</inf> is shown to be the self-impedance of the antenna, Z<inf>2</inf> the mutual impedance between the antenna and its perfect image, and Z<inf>3</inf> an impedance component due to the finite conductivity of the earth. Z<inf>3</inf> is found to be proportional to two factors, one of which depends on the conductivity and dielectric coefficient of the earth and the wavelength and the other of which depends only on the ratio h/λ, where h = antenna height and λ = wavelength. Z<inf>3</inf> is put in a form suitable for the computation of any given case and curves are shown for four typical examples. For λ > 10 meters and all except very dry soil, the effect of the finite conductivity is quite small and the assumption, often made, of a perfectly reflecting earth thus is justified for a large number of cases. The impedance is, except for very short waves or exceedingly dry soil, substantially that obtained for a perfectly conducting earth. A principle of similitude is stated, in which two antennas over the same kind of earth and having equal values of h/λ have identical impedances.","PeriodicalId":54574,"journal":{"name":"Proceedings of the Institute of Radio Engineers","volume":"61 1","pages":"150-167"},"PeriodicalIF":0.0,"publicationDate":"2013-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/ire.1935.6449185","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"62333472","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: 4

Trans-Oceanic Radio Communication 跨洋无线电通信

Proceedings of the Institute of Radio Engineers Pub Date : 1999-10-01 DOI: 10.1109/jproc.1999.790645

E. Alexanderson

引用次数: 1

A discussion on experimental tests of the radiation law for radio oscillators 无线电振荡器辐射规律实验测试的讨论

Proceedings of the Institute of Radio Engineers Pub Date : 1997-02-01 DOI: 10.1109/JRPROC.1913.216563

M. Pupin

引用次数: 2

A Short-Wave Single-Side-Band Radiotelephone System 短波单边带无线电话系统

Proceedings of the Institute of Radio Engineers Pub Date : 1938-12-01 DOI: 10.1109/JRPROC.1938.228178

A. A. Oswald

引用次数: 13

A Single-Side-Band Receiver for Short-Wave Telephone Service 用于短波电话业务的单边带接收机

Proceedings of the Institute of Radio Engineers Pub Date : 1938-12-01 DOI: 10.1109/JRPROC.1938.228179

A. Roetken

引用次数: 4