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Journal of Research of the National Bureau of Standards, Section D: Radio Propagation最新文献

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Diurnal and seasonal changes in structure of the midlatitude quiet ionosphere 中纬度平静电离层结构的日变化和季节变化
Journal of Research of the National Bureau of Standards, Section D: Radio Propagation Pub Date : 1962-05-01 DOI: 10.6028/JRES.066D.034
J. Wright
{"title":"Diurnal and seasonal changes in structure of the midlatitude quiet ionosphere","authors":"J. Wright","doi":"10.6028/JRES.066D.034","DOIUrl":"https://doi.org/10.6028/JRES.066D.034","url":null,"abstract":"","PeriodicalId":398550,"journal":{"name":"Journal of Research of the National Bureau of Standards, Section D: Radio Propagation","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125872100","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: 9
Correlation between hourly median scattered signals and simple refractivity parameters 每小时散射信号中位数与简单折射参数的相关性
Journal of Research of the National Bureau of Standards, Section D: Radio Propagation Pub Date : 1962-05-01 DOI: 10.6028/JRES.066D.032
A. Dennis
{"title":"Correlation between hourly median scattered signals and simple refractivity parameters","authors":"A. Dennis","doi":"10.6028/JRES.066D.032","DOIUrl":"https://doi.org/10.6028/JRES.066D.032","url":null,"abstract":"Measured signals on two t ropospheri c scatter links have bee n analyzed in t he liO\"ht of radio refractivity profiles prepared from radiosonde data. On the shorter link (San DiegoSanta Ana, 85 miles) t he basic transmission loss was found to be approximately a li nea r fun ct ion of f1N, t he change in radio refractivity from the gro und to a height of 1 ki lometer. On the longer (Cape CanaveralNew Providence I sla nd , Baha mas, 300 miles) t he relationship between transmission loss a nd f1N was nonlinear , and better results were obtained by averaging the refractivity gradi ent over 5,000 fee t . Correlation coefficients on t he San DiegoSanta Ana link range from 0.39 in August to 0.84 in February. On the Cape CanaveralN ew Providence link the co rrelation factor is 0.92. The results show the feasibility of forecasting signal-to-noise ratios on over-water t ropospheri c scatter co mmunications syst ems on a daily or hourly basis.","PeriodicalId":398550,"journal":{"name":"Journal of Research of the National Bureau of Standards, Section D: Radio Propagation","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129205684","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
On the role of the process of reflection in radio wave propagation 反射过程在无线电波传播中的作用
Journal of Research of the National Bureau of Standards, Section D: Radio Propagation Pub Date : 1962-05-01 DOI: 10.6028/JRES.066D.031
F. Castel, P. Misme, A. Spizzichino, J. Voge
{"title":"On the role of the process of reflection in radio wave propagation","authors":"F. Castel, P. Misme, A. Spizzichino, J. Voge","doi":"10.6028/JRES.066D.031","DOIUrl":"https://doi.org/10.6028/JRES.066D.031","url":null,"abstract":"Nature offers numerous examples of irregular stratification of t he medium for the p rop:t gation of radio waves. A study of t he process of reflection in such a mcdium distinguishes between specular reflection and diffuse reflection. The phenomenon of trans-hori zon tropospheric propagation offers an example of t he application of such a process, necessar.\" for t he interpretation of experimental results. Other examples are those of ionospheric propagation (sporadic-E laycr) and propagation over an irregular ground surfact' (phenom enon of albedo).","PeriodicalId":398550,"journal":{"name":"Journal of Research of the National Bureau of Standards, Section D: Radio Propagation","volume":"219 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123096278","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
Ionospheric irregularities and long-distance radio propagation 电离层不规则和远距离无线电传播
Journal of Research of the National Bureau of Standards, Section D: Radio Propagation Pub Date : 1962-05-01 DOI: 10.6028/JRES.066D.030
H. Whale
{"title":"Ionospheric irregularities and long-distance radio propagation","authors":"H. Whale","doi":"10.6028/JRES.066D.030","DOIUrl":"https://doi.org/10.6028/JRES.066D.030","url":null,"abstract":"","PeriodicalId":398550,"journal":{"name":"Journal of Research of the National Bureau of Standards, Section D: Radio Propagation","volume":"209 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124242567","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: 1
THE ELECTRIC FIELD AT THE GROUND PLANE NEAR A DISK-LOADED MONOPOLE 磁碟式单极子附近地平面上的电场
Journal of Research of the National Bureau of Standards, Section D: Radio Propagation Pub Date : 1962-03-01 DOI: 10.6028/JRES.066D.024
J. Hansen, T. Larsen
{"title":"THE ELECTRIC FIELD AT THE GROUND PLANE NEAR A DISK-LOADED MONOPOLE","authors":"J. Hansen, T. Larsen","doi":"10.6028/JRES.066D.024","DOIUrl":"https://doi.org/10.6028/JRES.066D.024","url":null,"abstract":"Abstract : IN CALCULATING GROUND LOSSES FOR ANTENNAS IT IS OF IMPORTANCE TO KNOW THE VERTICAL ELECTRIC FIELD STRENGTH AND THE TANGENTIAL MAGNETIC FIELD STRENGTH AT THE SURFACE OFPUTATIONS ARE CARRIED OUT TO SOME EXTENT. (Author)","PeriodicalId":398550,"journal":{"name":"Journal of Research of the National Bureau of Standards, Section D: Radio Propagation","volume":"30 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116406191","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
Impedance of a monopole antenna with a radial-wire ground system on an imperfectly conducting half space, part I 非完全导电半空间上径向线接地系统单极天线的阻抗，第1部分
Journal of Research of the National Bureau of Standards, Section D: Radio Propagation Pub Date : 1962-03-01 DOI: 10.6028/JRES.066D.021
S. Maley, R. King
{"title":"Impedance of a monopole antenna with a radial-wire ground system on an imperfectly conducting half space, part I","authors":"S. Maley, R. King","doi":"10.6028/JRES.066D.021","DOIUrl":"https://doi.org/10.6028/JRES.066D.021","url":null,"abstract":"The impedance of a v('rtical monopole lo cated over the surface of an imperfect ly conducting ear t h a nd having a radial-wire gro und system has been st udied theoretically by J. R Wait. An exp erim ental investigation di scussed in pa rt I of this pa per gave results in good agreem ent with Wai t's theory. Thi s part of the paper is a presentation of calculatio ns based on Wait's theory showing t he behav ior of a nte nn a im pedance as a funct ion of a ntenna h('i ght, toploading a nd number, size, !1lld lengt ll of rad ia l wires.","PeriodicalId":398550,"journal":{"name":"Journal of Research of the National Bureau of Standards, Section D: Radio Propagation","volume":"23 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114041014","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
The summer intensity variations of [OI] 6300 A in the tropics [OI] 6300a在热带的夏季强度变化
Journal of Research of the National Bureau of Standards, Section D: Radio Propagation Pub Date : 1962-03-01 DOI: 10.6028/JRES.066D.017
D. Barbier, F. Roach, W. Steiger
{"title":"The summer intensity variations of [OI] 6300 A in the tropics","authors":"D. Barbier, F. Roach, W. Steiger","doi":"10.6028/JRES.066D.017","DOIUrl":"https://doi.org/10.6028/JRES.066D.017","url":null,"abstract":"","PeriodicalId":398550,"journal":{"name":"Journal of Research of the National Bureau of Standards, Section D: Radio Propagation","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125901904","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: 11
Generation of radio noise in the vicinity of the earth 在地球附近产生的无线电噪声
Journal of Research of the National Bureau of Standards, Section D: Radio Propagation Pub Date : 1962-03-01 DOI: 10.6028/JRES.066D.018
P. Sturrock
{"title":"Generation of radio noise in the vicinity of the earth","authors":"P. Sturrock","doi":"10.6028/JRES.066D.018","DOIUrl":"https://doi.org/10.6028/JRES.066D.018","url":null,"abstract":"Abstract : A tentative classification of possible sources of radio noise in the vicinity of the earth ay be obtai ed by examining separately available sources of power and known mechanism for conversion of this power. Among the former we may list high-energy electrons such as those trapped in the Van Allen belts; the solar wind; bursts of high-energy particles ejected by the sun; shock waves in the interplanetary medium originating on the sun; and the rotational energy of the earth. Mechanisms of conversion may be classified as direct, such as synchrotron and Cerenkov radiation, and indirect. Indirect conversion involves the excitation of an intermediate state by the available sources of power and subsequent radiation by this state. This intermediate sta e may be localized heating, the formation of unstable current patterns, the acceleration of particles, or the generation of waves which are themselves nonradiative, such as plasma oscillations. The following mechanisms which are relevant to the generation of radio noise receive special attention: Cerenkov radiation, two-stream instability, and the coupling of waves by inhomogeneity and nonlinearity. (Author)","PeriodicalId":398550,"journal":{"name":"Journal of Research of the National Bureau of Standards, Section D: Radio Propagation","volume":"17 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120991065","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
Fading characteristics observed on a high-frequency auroral radio path 在高频极光无线电路径上观测到的衰落特征
Journal of Research of the National Bureau of Standards, Section D: Radio Propagation Pub Date : 1962-03-01 DOI: 10.6028/JRES.066D.019
J. Koch, H. Petrie
{"title":"Fading characteristics observed on a high-frequency auroral radio path","authors":"J. Koch, H. Petrie","doi":"10.6028/JRES.066D.019","DOIUrl":"https://doi.org/10.6028/JRES.066D.019","url":null,"abstract":"Obsen·ations of f,.d ing chamcLeri sLics of h igh-frequency sig na,ls have been carried ou t on a long path (4,470 ki lometer,) pass i ll '~ Llnoug h the a uroral zone. SLaListics were obLain ed on fad ing rate, shor t-Lern1. carrier amp liLud e flu ctuaLio ns, and fad e duraLio ns. Fad in~ raLes higher than 20 c:vcles per seco nd were observed for a s mall percenLage of Lhe time at eac h of the t hree carrier frequencies u sed , >Lnd show only a minor d itlrnalLrend, wiLh lhe maximum usually occu rring during t he early morning h ours. Rayleigh di sLribuLions of carrier envelope ampli Lude were obtain ed for man y of the obse rvaL ions; however , fading d epLh was normally reduced durin g periods of rap id fad ing.","PeriodicalId":398550,"journal":{"name":"Journal of Research of the National Bureau of Standards, Section D: Radio Propagation","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121898544","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: 3
Some problems connected with Rayleigh distributions 与瑞利分布有关的一些问题
Journal of Research of the National Bureau of Standards, Section D: Radio Propagation Pub Date : 1962-03-01 DOI: 10.6028/JRES.066D.020
M. M. Siddiqui
{"title":"Some problems connected with Rayleigh distributions","authors":"M. M. Siddiqui","doi":"10.6028/JRES.066D.020","DOIUrl":"https://doi.org/10.6028/JRES.066D.020","url":null,"abstract":"This is an expository paper presenting t he following : (1) t hc origin, and (2) t he propelties of the R ayleigh distribution ; (3) the most e fficient cstimators of its paramctcrs; (4) a test of the hypothesis that a set of observations is from a R ayleigh dist ribu t ion ; (5) t he distr ibu t ion of t he ratio of t wo independent Rayleigh vari \"tcs; and (6) the Rayleigh process deri ved from a normal process.","PeriodicalId":398550,"journal":{"name":"Journal of Research of the National Bureau of Standards, Section D: Radio Propagation","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121389066","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: 106
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