Pub Date : 1988-06-07DOI: 10.1109/CPEM.1988.671184
J. Helmcke
The influences of laser spectroscopy and optical frequency standards on basic physics fundamental constants are discussed.
讨论了激光光谱和光学频率标准对基本物理常数的影响。
{"title":"Optical frequency standards: relations to basic physics and fundamental constants","authors":"J. Helmcke","doi":"10.1109/CPEM.1988.671184","DOIUrl":"https://doi.org/10.1109/CPEM.1988.671184","url":null,"abstract":"The influences of laser spectroscopy and optical frequency standards on basic physics fundamental constants are discussed.","PeriodicalId":326579,"journal":{"name":"1988 Conference on Precision Electromagnetic Measurements","volume":"2009 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127333404","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}
Pub Date : 1988-06-07DOI: 10.1109/CPEM.1988.671377
I. Krasnopolin, V. Pudalov, S. Semenchinsky
{"title":"Performance of the Quantum Hall Effect Resistance Standard at IMS","authors":"I. Krasnopolin, V. Pudalov, S. Semenchinsky","doi":"10.1109/CPEM.1988.671377","DOIUrl":"https://doi.org/10.1109/CPEM.1988.671377","url":null,"abstract":"","PeriodicalId":326579,"journal":{"name":"1988 Conference on Precision Electromagnetic Measurements","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127364822","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}
Pub Date : 1988-06-07DOI: 10.1109/CPEM.1988.671312
T. J. Witt, F. Delahaye, D. Bournaud
To evaluate the agreement among determinations of the quantized Hall resistance, RH, in terms of national representations of the ohm, the BIPM organized and conducted an international comparison of one-ohm resistance standards among twelve laboratories. A relative uncertainty of about 2 x 10-8 is expected for some of the resistance comparisons. Resulting values of RH will be presented.
{"title":"The 1987 International Comparison of One-OHM Resistance Standards at the BIPM and the Resulting Agreement Among Determination of RH","authors":"T. J. Witt, F. Delahaye, D. Bournaud","doi":"10.1109/CPEM.1988.671312","DOIUrl":"https://doi.org/10.1109/CPEM.1988.671312","url":null,"abstract":"To evaluate the agreement among determinations of the quantized Hall resistance, RH, in terms of national representations of the ohm, the BIPM organized and conducted an international comparison of one-ohm resistance standards among twelve laboratories. A relative uncertainty of about 2 x 10-8 is expected for some of the resistance comparisons. Resulting values of RH will be presented.","PeriodicalId":326579,"journal":{"name":"1988 Conference on Precision Electromagnetic Measurements","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122063110","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}
Pub Date : 1988-06-07DOI: 10.1109/CPEM.1988.671340
B. Stojanovic, L. J. Jovanovic, R. Bergeest, R. Zirple
A solution for high accuracy electric power measurements for distorted input signals on industrial frequencies (50, 60 Hz) is presented. An improvement in the method of time-division technics is introduced and it refutes the oppinions that time-division technics is not convenient for wideband applications. The accuracy of the realised model is on the 100 ppm level for industrial frequency signals measurements with 100% harmonic distorsion up to 1 kHz.
{"title":"Time-Division Multiplication in Wideband Application","authors":"B. Stojanovic, L. J. Jovanovic, R. Bergeest, R. Zirple","doi":"10.1109/CPEM.1988.671340","DOIUrl":"https://doi.org/10.1109/CPEM.1988.671340","url":null,"abstract":"A solution for high accuracy electric power measurements for distorted input signals on industrial frequencies (50, 60 Hz) is presented. An improvement in the method of time-division technics is introduced and it refutes the oppinions that time-division technics is not convenient for wideband applications. The accuracy of the realised model is on the 100 ppm level for industrial frequency signals measurements with 100% harmonic distorsion up to 1 kHz.","PeriodicalId":326579,"journal":{"name":"1988 Conference on Precision Electromagnetic Measurements","volume":"150 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122422733","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}
Pub Date : 1988-06-07DOI: 10.1109/CPEM.1988.671203
W. Melbourne
The Global Positioning System will be used for differential positioning of low earth orbiting satellites with unprecedented accuracies. This in turn will lead to major improvements in ocean circulation information obtained from altimetric missions and in the geopotential model obtained from gravity missions.
{"title":"Precise Satellite Orbit Determination And Gravity Recovery With The Global Positioning Systek","authors":"W. Melbourne","doi":"10.1109/CPEM.1988.671203","DOIUrl":"https://doi.org/10.1109/CPEM.1988.671203","url":null,"abstract":"The Global Positioning System will be used for differential positioning of low earth orbiting satellites with unprecedented accuracies. This in turn will lead to major improvements in ocean circulation information obtained from altimetric missions and in the geopotential model obtained from gravity missions.","PeriodicalId":326579,"journal":{"name":"1988 Conference on Precision Electromagnetic Measurements","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127495396","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}
Pub Date : 1988-06-07DOI: 10.1109/CPEM.1988.671208
T. Morikawa, C. Miki, M. Uratsuka, E. Kawai, M. Imae, F. Takahashi, I. Harvey, T. Percival
In November and December 1987, the portable receiver experiment was performed betwene Japan and Australia to calibrate the delay time in GPS and GMS time comparison receivers. By the calibration the accuracy of GPS and GMS time comparison was improved to be 70ns.
{"title":"Calibration of the Delay Time in the GPS and GMS Time Comparison Receivers of Japan and Australia Using Portable Reference Receivers","authors":"T. Morikawa, C. Miki, M. Uratsuka, E. Kawai, M. Imae, F. Takahashi, I. Harvey, T. Percival","doi":"10.1109/CPEM.1988.671208","DOIUrl":"https://doi.org/10.1109/CPEM.1988.671208","url":null,"abstract":"In November and December 1987, the portable receiver experiment was performed betwene Japan and Australia to calibrate the delay time in GPS and GMS time comparison receivers. By the calibration the accuracy of GPS and GMS time comparison was improved to be 70ns.","PeriodicalId":326579,"journal":{"name":"1988 Conference on Precision Electromagnetic Measurements","volume":"30 23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133439258","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}
Pub Date : 1988-06-07DOI: 10.1109/CPEM.1988.671276
T. Iwasaki, I. Yokoshima
The structure and charactristics of a fiber optic step attenuator which is improved on the spectral dependency are described. The calibration system is also introduced.
介绍了一种改进了光谱依赖性的光纤阶跃衰减器的结构和特性。并介绍了标定系统。
{"title":"Step Attenuator for Multimode Fiber Optics and its Calibration","authors":"T. Iwasaki, I. Yokoshima","doi":"10.1109/CPEM.1988.671276","DOIUrl":"https://doi.org/10.1109/CPEM.1988.671276","url":null,"abstract":"The structure and charactristics of a fiber optic step attenuator which is improved on the spectral dependency are described. The calibration system is also introduced.","PeriodicalId":326579,"journal":{"name":"1988 Conference on Precision Electromagnetic Measurements","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122365835","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}
Pub Date : 1988-06-07DOI: 10.1109/CPEM.1988.671349
Wang Zhi, Sun Shenghe, Liu Yue
In this paper, a new formula to calculate load reflection coefficient is derived using absolute power theory of six-port measurement system. The computer simulation and experiment all show that in the presence of noise this formula is more precise than the one we used generally.
{"title":"New Reflection Coefficient Formula With Higher Precision in Six-Port","authors":"Wang Zhi, Sun Shenghe, Liu Yue","doi":"10.1109/CPEM.1988.671349","DOIUrl":"https://doi.org/10.1109/CPEM.1988.671349","url":null,"abstract":"In this paper, a new formula to calculate load reflection coefficient is derived using absolute power theory of six-port measurement system. The computer simulation and experiment all show that in the presence of noise this formula is more precise than the one we used generally.","PeriodicalId":326579,"journal":{"name":"1988 Conference on Precision Electromagnetic Measurements","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123921469","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}
Pub Date : 1988-06-07DOI: 10.1109/CPEM.1988.671192
V. Kroupa
In the present contribution we have shown the 1/f/sup 2/ noise in oscillators need not be neceesarily generated by environmental temperature fluctuations. As a consequence we investigate a possible theoretical evidence for the relationship between 1/f and l/f/sup 2/ noises.
{"title":"Extremely Low Frequency Noise in Oscillators","authors":"V. Kroupa","doi":"10.1109/CPEM.1988.671192","DOIUrl":"https://doi.org/10.1109/CPEM.1988.671192","url":null,"abstract":"In the present contribution we have shown the 1/f/sup 2/ noise in oscillators need not be neceesarily generated by environmental temperature fluctuations. As a consequence we investigate a possible theoretical evidence for the relationship between 1/f and l/f/sup 2/ noises.","PeriodicalId":326579,"journal":{"name":"1988 Conference on Precision Electromagnetic Measurements","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127927154","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}
Pub Date : 1988-06-07DOI: 10.1109/CPEM.1988.671248
N. Kawaguchi, N. Kurihara, J. Amagai, F. Takahashi
The millimeter accuracy of the geodetic VLBI measurements was demonstrated in the experiments repeated 4 times on a 54-km baseline between a 5-m transportable antenna at Tsukuba and a 26-m antenna at Kashima. The error analysis shows that the thermal reeeiver noise is a main cause of the delay observation error and the atmospheric fluctuations mainly affect on the delay rate observations.
{"title":"The Millimeter Accuracy of the Geodetic VLBI Measurements Achieved on a 54-KM Base Line","authors":"N. Kawaguchi, N. Kurihara, J. Amagai, F. Takahashi","doi":"10.1109/CPEM.1988.671248","DOIUrl":"https://doi.org/10.1109/CPEM.1988.671248","url":null,"abstract":"The millimeter accuracy of the geodetic VLBI measurements was demonstrated in the experiments repeated 4 times on a 54-km baseline between a 5-m transportable antenna at Tsukuba and a 26-m antenna at Kashima. The error analysis shows that the thermal reeeiver noise is a main cause of the delay observation error and the atmospheric fluctuations mainly affect on the delay rate observations.","PeriodicalId":326579,"journal":{"name":"1988 Conference on Precision Electromagnetic Measurements","volume":"121 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129394026","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}
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