时间频率公报最新文献

Tutorial session 教程会话

时间频率公报 Pub Date : 2019-03-01 DOI: 10.1109/freq.2009.5168114

引用次数: 0

Research on time and frequency transfer based on BeiDou common view 基于北斗公共视图的时频传输研究

时间频率公报 Pub Date : 2015-07-02 DOI: 10.1109/FCS.2015.7138905

Hang Yi, Hongbo Wang, Shengkang Zhang, Haifeng Wang, F. Shi, Huaiying Shang, J. Ge, Yujie Yang, Zhiqi Li

引用次数: 1

Development of an erbium-fiber-laser-based optical frequency comb at NTSC 铒光纤激光光学频率梳的研制

时间频率公报 Pub Date : 2015-07-02 DOI: 10.1109/FCS.2015.7138916

Yanyan Zhang, Lulu Yan, S. Fan, Long Zhang, Wenyu Zhao, Wenge Guo, Shougang Zhang, Haifeng Jiang

引用次数: 2

6/12-channel synchronous digital phasemeter for ultrastable signal characterization and use 6/12通道同步数字相位计，用于超稳定信号的表征和使用

时间频率公报 Pub Date : 2015-07-02 DOI: 10.1109/FCS.2015.7138934

Caligaris Massimo, G. Costanzo, C. Calosso

引用次数: 4

Preparing ACES-PHARAO data analysis 准备ACES-PHARAO数据分析

时间频率公报 Pub Date : 2015-07-02 DOI: 10.1109/FCS.2015.7138906

F. Meynadier, P. Delva, Christophe le Poncin-Laffite, C. Guerlin, P. Laurent, P. Wolf

{"title":"Preparing ACES-PHARAO data analysis","authors":"F. Meynadier, P. Delva, Christophe le Poncin-Laffite, C. Guerlin, P. Laurent, P. Wolf","doi":"10.1109/FCS.2015.7138906","DOIUrl":"https://doi.org/10.1109/FCS.2015.7138906","url":null,"abstract":"The Atomic Clocks Ensemble in Space (ACESPHARAO mission [1]) will realize, on board of the International Space Station, a time scale of very high stability and accuracy, connected to a dedicated microwave link (MWL) for comparison to ground clocks. This will allow to perform high performance time transfers between distant ground stations, as well as fundamental physics tests, such as measuring the gravitational redshift with unprecedented accuracy, and search for a violation of the Lorentz local invariance. Our team at SYRTE is currently developing a dedicated software for analyzing the data retrieved by the MWL. It will be a crucial component of the processing chain, allowing to reach the nominal scientific performances, thus complementing the quicklook data provided by the ground segment. During ACES flight, our software will run in a data processing center that will be set up in SYRTE, and process data as requested by IWG (ACES Investigator Working Group) request. We will present the current status of the data analysis software and its expected capabilities, mostly based on data generated by our own data simulator, but also some preliminary results of comparisons with actual test data from the instruments. Our simulator itself will also be presented, as it plays a key role in the validation of the data analysis software, and also allows to assert the sensitivity of ACES data to various theoretical signatures.","PeriodicalId":57667,"journal":{"name":"时间频率公报","volume":"2 1","pages":"557-561"},"PeriodicalIF":0.0,"publicationDate":"2015-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90414711","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

Bias corrections in primary frequency standards 初级频率标准中的偏置校正

时间频率公报 Pub Date : 2015-04-12 DOI: 10.1109/FCS.2015.7138945

T. Parker, T. H. Heavner, S. Jefferts

引用次数: 0

Frequency performance of the New Horizons ultra-stable oscillators nine years of continuous in-flight monitoring 新视野超稳定振荡器的频率性能，连续9年的飞行监测

时间频率公报 Pub Date : 2015-04-12 DOI: 10.1109/FCS.2015.7138810

J. R. Jensen, G. Weaver

引用次数: 0

Sputtered Al(1−x)ScxN thin films with high areal uniformity for mass production 溅射Al(1−x)ScxN薄膜，具有高面积均匀性，适合批量生产

时间频率公报 Pub Date : 2015-04-12 DOI: 10.1109/FCS.2015.7138803

V. Felmetsger, M. Mikhov, M. DeMiguel-Ramos, M. Clement, J. Olivares, T. Mirea, E. Iborra

{"title":"Sputtered Al(1−x)ScxN thin films with high areal uniformity for mass production","authors":"V. Felmetsger, M. Mikhov, M. DeMiguel-Ramos, M. Clement, J. Olivares, T. Mirea, E. Iborra","doi":"10.1109/FCS.2015.7138803","DOIUrl":"https://doi.org/10.1109/FCS.2015.7138803","url":null,"abstract":"In this work, we describe a sputter technique enabling deposition of AlScN thin films with homogeneous thickness and composition on production size wafers (150-200 mm) and present some preliminary results on the assessment of the structural and piezoelectric properties of the films with Sc content of about 6.5 at.%. The technique is based on the use of pure Sc ingots embedded into the Al targets of the dual-target S-gun magnetron enabling reactive sputtering with high radial thickness and composition homogeneity. Rutherford backscattering spectrometry was carried out to obtain the film composition. The microstructure and morphology were assessed by X-ray diffraction. Density was determined by X-ray grazing angle reflectometry. Electroacoustic properties and dielectric constant were derived from the frequency response of BAW test resonators. 1 μm-thick films showed wurtzite structure with pure c-axis orientation and rocking curves of the (00·2) diffraction peak with FWHM as low as 1.5°. Film properties appear to be uniform across 150-mm wafers. The material electromechanical coupling factor reached 9%, although the sound velocity of longitudinal mode was relatively low (around 8500 m/s).","PeriodicalId":57667,"journal":{"name":"时间频率公报","volume":"1 1","pages":"117-120"},"PeriodicalIF":0.0,"publicationDate":"2015-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74448158","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: 6

Noise in high-speed digital-to-analog converters 高速数模转换器中的噪声

时间频率公报 Pub Date : 2015-04-12 DOI: 10.1109/FCS.2015.7138932

P. Bourgeois, T. Imaike, G. Goavec-Mérou, E. Rubiola

引用次数: 6

Micro OXCO EWOS-0513: A 20 years space odyssey up to 67P/Churyumov-Gerasimenko Micro OXCO EWOS-0513:一次长达20年的太空漫游，最高可达67P/Churyumov-Gerasimenko

时间频率公报 Pub Date : 2015-04-12 DOI: 10.1109/FCS.2015.7138804

P. Guillemot, G. Cibiel, Yves Richard, J.-M. Tarot, G. Richard

{"title":"Micro OXCO EWOS-0513: A 20 years space odyssey up to 67P/Churyumov-Gerasimenko","authors":"P. Guillemot, G. Cibiel, Yves Richard, J.-M. Tarot, G. Richard","doi":"10.1109/FCS.2015.7138804","DOIUrl":"https://doi.org/10.1109/FCS.2015.7138804","url":null,"abstract":"The story probably started somewhere on the planet Mars in the middle of the 90s' when the Sojourner rover demonstrated that it was possible to make great space missions with `low cost' systems. It was the beginning of the `Better / Faster / Cheaper' period. It led space agencies and space industry to develop space equipment using `professional' systems instead of full space qualified ones. In 1995, the CNES, the French Space Agency, decided to develop a family of `low cost' space miniaturized OCXOs. A so called EWOS-0500 micro OCXO, used up to then for distress beacons, was selected for this purpose. The EWOS-0500 was a very small size (DIL 14, 1.5 cm3) and low power (150 mW) OCXO with a short-term stability in the 10-11 range (A-Dev) and a frequency stability of 0.2 ppm in the temperature range [-30 °C; +60°C]. A specific qualification program was set up, to demonstrate the performances and the capability of this OCXO to fulfil space missions. The EWOS-0513 micro OCXO was born. The EWOS-513 was embarked on numerous space missions, mainly in low earth orbit. But some of them were also embarked on the Rosetta mission for a 10 years journey through the solar system up to the 67P/Churyumov-Gerasimenko comet. Once arrived, they contributed to the success of the mission, allowing telecommunication between the orbiter and the lander and being involved in the science program through the CONSERT instrument. This paper redraws the main steps and the main performances of this program that led an oscillator initially intended for distress beacons to contribute to the success of the Rosetta mission.","PeriodicalId":57667,"journal":{"name":"时间频率公报","volume":"7 1","pages":"121-124"},"PeriodicalIF":0.0,"publicationDate":"2015-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78624048","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