Pub Date : 2017-08-01DOI: 10.23919/URSIGASS.2017.8105223
S. Lejosne, F. Mozer
Although electric fields play a fundamental role in space physics, they are difficult to observe experimentally. This is particularly true close to Earth, because of accuracy issues around spacecraft perigee. Yet, to improve our understanding of the plasmasphere dynamics, ground-truth about the low-L convection field could be key. With that in mind, we developed a unique database of equatorial electric drifts E × B/B2 below L= 3, using more than two years of magnetic and electric field measurements from the two Van Allen Probe spacecraft. In previous work, we demonstrated that the Van Allen Probes had the accuracy required to provide reliable measurements of the electric drift close to spacecraft perigee. We performed a first statistical analysis of the database and we derived typical values of the electric drift below L= 3, in both radial and azimuthal directions. We studied the dependences of the electric drift on radial distance, magnetic local time, and geographic longitude. Then we investigated the Van Allen Probe electric drift database with a focus on anomalous behavior, i.e., with a focus on those electric drifts that significantly diverge from expectations. We will present the results of our investigation. The circumstances that lead to such anomalous values together with the consequences on the overall dynamics of the plasmasphere will be assessed. To our best knowledge, this work represents the most comprehensive observational description of the electric drift around magnetic equator below L∼3. It can be used for example to question the suitability of different electric field models in the low L-region.
{"title":"What can we learn from the Van Allen probe measurements of the electric drift E × B/B2 in the inner magnetosphere? — An update","authors":"S. Lejosne, F. Mozer","doi":"10.23919/URSIGASS.2017.8105223","DOIUrl":"https://doi.org/10.23919/URSIGASS.2017.8105223","url":null,"abstract":"Although electric fields play a fundamental role in space physics, they are difficult to observe experimentally. This is particularly true close to Earth, because of accuracy issues around spacecraft perigee. Yet, to improve our understanding of the plasmasphere dynamics, ground-truth about the low-L convection field could be key. With that in mind, we developed a unique database of equatorial electric drifts E × B/B2 below L= 3, using more than two years of magnetic and electric field measurements from the two Van Allen Probe spacecraft. In previous work, we demonstrated that the Van Allen Probes had the accuracy required to provide reliable measurements of the electric drift close to spacecraft perigee. We performed a first statistical analysis of the database and we derived typical values of the electric drift below L= 3, in both radial and azimuthal directions. We studied the dependences of the electric drift on radial distance, magnetic local time, and geographic longitude. Then we investigated the Van Allen Probe electric drift database with a focus on anomalous behavior, i.e., with a focus on those electric drifts that significantly diverge from expectations. We will present the results of our investigation. The circumstances that lead to such anomalous values together with the consequences on the overall dynamics of the plasmasphere will be assessed. To our best knowledge, this work represents the most comprehensive observational description of the electric drift around magnetic equator below L∼3. It can be used for example to question the suitability of different electric field models in the low L-region.","PeriodicalId":377869,"journal":{"name":"2017 XXXIInd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134454199","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 : 2017-08-01DOI: 10.23919/URSIGASS.2017.8105052
Bin Li, Jiayun Song, M. Zhang
This paper descripts a high precision signal analysis system of SoC, which can accurately measure the signal amplitude, frequency, and other parameter. The FFT can analyze the amplitude of the signal after ADC collecting and windowing the data, and the Equal-precision frequency measurement model could accurately measure the signal. The signal analysis system depended on the method works accurately, stably, and high integrity, with a wide application.
{"title":"A high precision signal analysis system based on SoC","authors":"Bin Li, Jiayun Song, M. Zhang","doi":"10.23919/URSIGASS.2017.8105052","DOIUrl":"https://doi.org/10.23919/URSIGASS.2017.8105052","url":null,"abstract":"This paper descripts a high precision signal analysis system of SoC, which can accurately measure the signal amplitude, frequency, and other parameter. The FFT can analyze the amplitude of the signal after ADC collecting and windowing the data, and the Equal-precision frequency measurement model could accurately measure the signal. The signal analysis system depended on the method works accurately, stably, and high integrity, with a wide application.","PeriodicalId":377869,"journal":{"name":"2017 XXXIInd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)","volume":"139 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134530002","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 : 2017-08-01DOI: 10.23919/URSIGASS.2017.8105056
M. Tsutsui
For clarifying the excitation mechanism of co-seismic electromagnetic (EM) waves, I have been observing earthquake-related EM waves in the deep earth and above the ground together with measurements of seismic waves, and also conducted a laboratory experiment. As the result, I have found that EM waves were easily excited by seismic P-wave oscillations in the earth's crust due to piezo-electric effect. The amplitude of the EM wave was enlarged at arrival of seismic S-wave which largely deformed the P-wave amplitude. It has been confirmed, from observed waveforms, that a large amplitude of co-seismic EM wave always appears in the wave-front of the seismic S-wave. Since the EM wave was radiated but rapidly decayed due to a large electrical conductivity of the earth's crust, we could imagine a composite wave system, in which a rapidly decaying co-seismic EM wave is antecedent to the seismic S-wave, and the system is moving with the velocity of the seismic S-wave. It has been also confirmed that a co-seismic EM wave detected above the ground showed ellipsoidal polarization although another EM wave simultaneously detected in the earth showed a linear polarization, which is a result of phase shifts of the EM wave in its penetration through a boundary of two media (from the earth medium to the air).
{"title":"Excitation mechanism and behaviors of co-seismic electromagnetic waves","authors":"M. Tsutsui","doi":"10.23919/URSIGASS.2017.8105056","DOIUrl":"https://doi.org/10.23919/URSIGASS.2017.8105056","url":null,"abstract":"For clarifying the excitation mechanism of co-seismic electromagnetic (EM) waves, I have been observing earthquake-related EM waves in the deep earth and above the ground together with measurements of seismic waves, and also conducted a laboratory experiment. As the result, I have found that EM waves were easily excited by seismic P-wave oscillations in the earth's crust due to piezo-electric effect. The amplitude of the EM wave was enlarged at arrival of seismic S-wave which largely deformed the P-wave amplitude. It has been confirmed, from observed waveforms, that a large amplitude of co-seismic EM wave always appears in the wave-front of the seismic S-wave. Since the EM wave was radiated but rapidly decayed due to a large electrical conductivity of the earth's crust, we could imagine a composite wave system, in which a rapidly decaying co-seismic EM wave is antecedent to the seismic S-wave, and the system is moving with the velocity of the seismic S-wave. It has been also confirmed that a co-seismic EM wave detected above the ground showed ellipsoidal polarization although another EM wave simultaneously detected in the earth showed a linear polarization, which is a result of phase shifts of the EM wave in its penetration through a boundary of two media (from the earth medium to the air).","PeriodicalId":377869,"journal":{"name":"2017 XXXIInd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130701190","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 : 2017-08-01DOI: 10.23919/URSIGASS.2017.8120341
Kejia Ding, Jinyu Bai, A. Kishk
A novel 6×6 beam-forming network with the topology structure and the properties similar to Butler Matrices is represented in this paper. Two 3×3 hybrid couplers are adopted as the substitution of traditional 3dB-90° hybrids to introduce the factor of 3 into in this network for changing the numbers of ports and beams from conventional 2n to 6. Moreover, one kind of 2×2 hybrid couplers with quasi-arbitrary phase-difference is utilized as well to eliminate using fixed phase shifters in this design for a smaller size and a lower loss. As an example, one proposed 6×6 network working at 5.8GHz has been designed, simulated, fabricated and measured. Good performances in matching, isolations, equal power divisions, coherent phase differences at all ports have been achieved. The possibility of improving structural flexibility of Butler Matrices by employing 3×3 hybrids is demonstrated in this paper.
{"title":"A quasi butler matrix with 6×6 beam-forming capacity using 3×3 hybrid couplers","authors":"Kejia Ding, Jinyu Bai, A. Kishk","doi":"10.23919/URSIGASS.2017.8120341","DOIUrl":"https://doi.org/10.23919/URSIGASS.2017.8120341","url":null,"abstract":"A novel 6×6 beam-forming network with the topology structure and the properties similar to Butler Matrices is represented in this paper. Two 3×3 hybrid couplers are adopted as the substitution of traditional 3dB-90° hybrids to introduce the factor of 3 into in this network for changing the numbers of ports and beams from conventional 2n to 6. Moreover, one kind of 2×2 hybrid couplers with quasi-arbitrary phase-difference is utilized as well to eliminate using fixed phase shifters in this design for a smaller size and a lower loss. As an example, one proposed 6×6 network working at 5.8GHz has been designed, simulated, fabricated and measured. Good performances in matching, isolations, equal power divisions, coherent phase differences at all ports have been achieved. The possibility of improving structural flexibility of Butler Matrices by employing 3×3 hybrids is demonstrated in this paper.","PeriodicalId":377869,"journal":{"name":"2017 XXXIInd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131183583","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 : 2017-08-01DOI: 10.23919/URSIGASS.2017.8105420
D. L. Le Vine, E. Dinnat, S. Brown, T. Meissner, F. Wentz, G. Lagerloef
Aquarius is an L-band instrument designed to measure sea surface salinity from space. The instrument was launched in 2011 and data acquisition ended in June 2015 when control of the spacecraft was lost. Aquarius produced global maps of salinity with accuracy of 0.2 psu and special resolution of 150 km as well as other products such as global maps of RFI and soil moisture. The mission will formally end December 2017.
{"title":"Status of remote sensing of salinity by aquarius","authors":"D. L. Le Vine, E. Dinnat, S. Brown, T. Meissner, F. Wentz, G. Lagerloef","doi":"10.23919/URSIGASS.2017.8105420","DOIUrl":"https://doi.org/10.23919/URSIGASS.2017.8105420","url":null,"abstract":"Aquarius is an L-band instrument designed to measure sea surface salinity from space. The instrument was launched in 2011 and data acquisition ended in June 2015 when control of the spacecraft was lost. Aquarius produced global maps of salinity with accuracy of 0.2 psu and special resolution of 150 km as well as other products such as global maps of RFI and soil moisture. The mission will formally end December 2017.","PeriodicalId":377869,"journal":{"name":"2017 XXXIInd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130840287","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}
Machine type communication (MTC) is a typical scenario in 5G communication systems, and massive machine type communication (MMTC) is a main type of MTC. One prominent characteristic of MMTC is massive connections and sporadic transmission with short packets. To embrace the new challenge in 5G emerging scenarios, flexible filterbased waveforms have been widely studied recently. In this paper, we evaluate three candidate waveforms, i.e., orthogonal frequency division multiplexing (OFDM), universal filtered multi-carrier (UFMC) and filtered-OFDM (F-OFDM) in MMTC. We conclude that UFMC and F-OFDM significantly reduce the out of band emission (OOBE) compared to OFDM. On the other hand, OFDM performs better than the other two non-orthogonal waveforms in terms of error performance for both frequency synchronous and asynchronous cases.
{"title":"Non-orthogonal waveforms for machine type communication","authors":"Xu He, Fanggang Wang, Xia Chen, Deshan Miao, Zhuyan Zhao","doi":"10.23919/URSIGASS.2017.8105280","DOIUrl":"https://doi.org/10.23919/URSIGASS.2017.8105280","url":null,"abstract":"Machine type communication (MTC) is a typical scenario in 5G communication systems, and massive machine type communication (MMTC) is a main type of MTC. One prominent characteristic of MMTC is massive connections and sporadic transmission with short packets. To embrace the new challenge in 5G emerging scenarios, flexible filterbased waveforms have been widely studied recently. In this paper, we evaluate three candidate waveforms, i.e., orthogonal frequency division multiplexing (OFDM), universal filtered multi-carrier (UFMC) and filtered-OFDM (F-OFDM) in MMTC. We conclude that UFMC and F-OFDM significantly reduce the out of band emission (OOBE) compared to OFDM. On the other hand, OFDM performs better than the other two non-orthogonal waveforms in terms of error performance for both frequency synchronous and asynchronous cases.","PeriodicalId":377869,"journal":{"name":"2017 XXXIInd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131087273","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 : 2017-08-01DOI: 10.23919/URSIGASS.2017.8105216
N. Zabotin, O. Godin, C. Negrea, T. Bullett, L. Zabotina
Dynasonde approach to ionospheric radio sounding capitalizes on high precision of physical parameters and rich statistics of recognized echoes phase-based methods can provide. As has been recently demonstrated, the Dynasonde profiles of the electron density and of the horizontal gradients, complemented with profiles of the Doppler speed, carry comprehensive quantitative information about Atmospheric Gravity Waves, a ubiquitous feature of the space weather that has become an important objective of atmospheric modeling. Being combined into a time series, and without additional processing, the profiles allow visualization of the time fronts of the Traveling Ionospheric Disturbances (TIDs). They also provide high-resolution input data for calculating the complete set of parameters (both vertical and horizontal) of TID activity in the upper atmosphere between the base of the E layer and the maximum of the F layer. Application of the Lomb-Scargle periodogram technique to the tilt data provides unique insight into the dynamics of spectral composition of the TIDs. A similar technique applied to longer time series allows determining characteristics of thermospheric tides. Single sounding sessions allow observations of ionospheric manifestations of acoustic waves produced by ground-based sources. All the mentioned products of the Dynasonde data analysis require a common, standard ionogram mode of radar operation. Therefore, information about standard parameters of the ionospheric E, F regions, possibility to obtain vector velocities characterizing movement of plasma contours, and quantitative parameters of the km-scale irregularity spectrum are not lost and contribute into comprehensive description of wave activity in the thermosphere-ionosphere system.
{"title":"Studies of wave activity in the thermosphere-ionosphere system using Dynasonde techniques","authors":"N. Zabotin, O. Godin, C. Negrea, T. Bullett, L. Zabotina","doi":"10.23919/URSIGASS.2017.8105216","DOIUrl":"https://doi.org/10.23919/URSIGASS.2017.8105216","url":null,"abstract":"Dynasonde approach to ionospheric radio sounding capitalizes on high precision of physical parameters and rich statistics of recognized echoes phase-based methods can provide. As has been recently demonstrated, the Dynasonde profiles of the electron density and of the horizontal gradients, complemented with profiles of the Doppler speed, carry comprehensive quantitative information about Atmospheric Gravity Waves, a ubiquitous feature of the space weather that has become an important objective of atmospheric modeling. Being combined into a time series, and without additional processing, the profiles allow visualization of the time fronts of the Traveling Ionospheric Disturbances (TIDs). They also provide high-resolution input data for calculating the complete set of parameters (both vertical and horizontal) of TID activity in the upper atmosphere between the base of the E layer and the maximum of the F layer. Application of the Lomb-Scargle periodogram technique to the tilt data provides unique insight into the dynamics of spectral composition of the TIDs. A similar technique applied to longer time series allows determining characteristics of thermospheric tides. Single sounding sessions allow observations of ionospheric manifestations of acoustic waves produced by ground-based sources. All the mentioned products of the Dynasonde data analysis require a common, standard ionogram mode of radar operation. Therefore, information about standard parameters of the ionospheric E, F regions, possibility to obtain vector velocities characterizing movement of plasma contours, and quantitative parameters of the km-scale irregularity spectrum are not lost and contribute into comprehensive description of wave activity in the thermosphere-ionosphere system.","PeriodicalId":377869,"journal":{"name":"2017 XXXIInd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132713451","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 : 2017-08-01DOI: 10.23919/URSIGASS.2017.8105113
Y. Nasser, K. Kabalan, A. Chehab
Millimeter Waves (mmWave) have recently attracted a lot of research interest in different domains. Among others, localization using mmWave became one of its major applications. In this paper, the tactile localization concept aiming at reaching sub-cm accuracy is introduced. The main challenges and approaches to realize tactile localization are also presented. The paper will mainly focus on the need for accurate channel measurements in conjunction with the applications opportunities namely in Ambient Assisted Living and indoor environment.
{"title":"Tactile localization in mm-WAVE systems: Channel measurements requirements, challenges and opportunities","authors":"Y. Nasser, K. Kabalan, A. Chehab","doi":"10.23919/URSIGASS.2017.8105113","DOIUrl":"https://doi.org/10.23919/URSIGASS.2017.8105113","url":null,"abstract":"Millimeter Waves (mmWave) have recently attracted a lot of research interest in different domains. Among others, localization using mmWave became one of its major applications. In this paper, the tactile localization concept aiming at reaching sub-cm accuracy is introduced. The main challenges and approaches to realize tactile localization are also presented. The paper will mainly focus on the need for accurate channel measurements in conjunction with the applications opportunities namely in Ambient Assisted Living and indoor environment.","PeriodicalId":377869,"journal":{"name":"2017 XXXIInd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)","volume":"85 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128841672","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 : 2017-08-01DOI: 10.23919/URSIGASS.2017.8105090
L. Baldini, F. Berizzi, A. Coccia, F. Cuccoli, M. d'Amico, S. Lischi, A. Lupidi, F. Milani
The European Commission initiative CleanSky launched several project activities aimed at improving flight route planning in the presence of unforeseen events, such as rapidly evolving thunderstorms occurring along the route, both to increase the safety and comfort of flight and to keep emissions as low as possible. Improving meteorological instrumentation onboard and supporting the pilot in interpreting such goals are important to achieve this goal. Potential improvements to aircraft weather radar related to the use of dual opalization technology were investigated along several CleanSky projects. Two experimental campaigns, were carried out in 2016 within the X-WALD project with a prototypal radar using a low-power X-band dual-polarization radar mounted in the nose of two different aircrafts in the Netherlands and in Italy. Results from these campaigns and comparison of data collected on board with ground-based instrumentation are presented.
{"title":"Precipitation sensing experiment with a prototype dual-polarization weather radar for civil aircraft","authors":"L. Baldini, F. Berizzi, A. Coccia, F. Cuccoli, M. d'Amico, S. Lischi, A. Lupidi, F. Milani","doi":"10.23919/URSIGASS.2017.8105090","DOIUrl":"https://doi.org/10.23919/URSIGASS.2017.8105090","url":null,"abstract":"The European Commission initiative CleanSky launched several project activities aimed at improving flight route planning in the presence of unforeseen events, such as rapidly evolving thunderstorms occurring along the route, both to increase the safety and comfort of flight and to keep emissions as low as possible. Improving meteorological instrumentation onboard and supporting the pilot in interpreting such goals are important to achieve this goal. Potential improvements to aircraft weather radar related to the use of dual opalization technology were investigated along several CleanSky projects. Two experimental campaigns, were carried out in 2016 within the X-WALD project with a prototypal radar using a low-power X-band dual-polarization radar mounted in the nose of two different aircrafts in the Netherlands and in Italy. Results from these campaigns and comparison of data collected on board with ground-based instrumentation are presented.","PeriodicalId":377869,"journal":{"name":"2017 XXXIInd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134621311","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 : 2017-08-01DOI: 10.23919/URSIGASS.2017.8105107
He Wei, Z. Weiwei, Cheng Chunyue, Yang Chuntao, Yin Hongcheng
Recent progress on microwave power standards in BIRMM (Beijing Institute of Radio Metrology and Measurement) was introduced in this paper. The paper is concentrated on four principal points as follows. Firstly, the timetable about research on microwave power standard is shown in section 2 according to time sequence since 2006. Secondly, microwave power standard's brief introduction including their operational theory is presented in section 3. Thirdly, method for calorimeter's effective efficiency evaluation was provided in section 4. Finally, our plans about microwave power standards development were shown in the end.
{"title":"Recent progress on microwave power standards in BIRMM","authors":"He Wei, Z. Weiwei, Cheng Chunyue, Yang Chuntao, Yin Hongcheng","doi":"10.23919/URSIGASS.2017.8105107","DOIUrl":"https://doi.org/10.23919/URSIGASS.2017.8105107","url":null,"abstract":"Recent progress on microwave power standards in BIRMM (Beijing Institute of Radio Metrology and Measurement) was introduced in this paper. The paper is concentrated on four principal points as follows. Firstly, the timetable about research on microwave power standard is shown in section 2 according to time sequence since 2006. Secondly, microwave power standard's brief introduction including their operational theory is presented in section 3. Thirdly, method for calorimeter's effective efficiency evaluation was provided in section 4. Finally, our plans about microwave power standards development were shown in the end.","PeriodicalId":377869,"journal":{"name":"2017 XXXIInd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115623780","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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