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Post-sunset Scintillation on NavIC Signals during Equinoctial Periods of 2021-2022 2021-2022年分点期间导航信号的日落后闪烁
2022 URSI Regional Conference on Radio Science (USRI-RCRS) Pub Date : 2022-12-01 DOI: 10.23919/URSI-RCRS56822.2022.10118572
Sukabya Dan, Satarupa Chatterjee, Swaraj Pal, Santanu Deb, C. Koley, A. Bose
{"title":"Post-sunset Scintillation on NavIC Signals during Equinoctial Periods of 2021-2022","authors":"Sukabya Dan, Satarupa Chatterjee, Swaraj Pal, Santanu Deb, C. Koley, A. Bose","doi":"10.23919/URSI-RCRS56822.2022.10118572","DOIUrl":"https://doi.org/10.23919/URSI-RCRS56822.2022.10118572","url":null,"abstract":"Ionospheric scintillation is a major threat to the trans-ionospheric communication/ navigation links causing data loss, cycle slip, loss of lock in Global Navigation Satellite System (GNSS) receivers, and degradation/ disruption in navigation quality. GNSS and NavIC signals have been used for the study of the ionosphere by researchers and NavIC signals offer definite advantages for ionospheric research from India. This study presents the results of moderate to intense post-sunset scintillation cases during the autumn equinox of 2021 and vernal equinox 2022 at NavIC signals in the L5 band and S-band. In October 2021, moderate scintillation is observed in the L5 signal only on more than one NavIC satellite links. In March 2022, moderate to intense scintillation is observed in the L5 signal compared to the moderate scintillation observed in the S-Band. The results would be useful in understanding the advantages of the S-band for navigation applications.","PeriodicalId":229743,"journal":{"name":"2022 URSI Regional Conference on Radio Science (USRI-RCRS)","volume":"203 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131646817","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
Analysis of Ka Band Inter-Fade Dynamics at an Indian Tropical Location 印度热带地区Ka波段间衰落动力学分析
2022 URSI Regional Conference on Radio Science (USRI-RCRS) Pub Date : 2022-12-01 DOI: 10.23919/URSI-RCRS56822.2022.10118500
Madhura Chakraborty, S. Chakraborty, Saurabh Das
{"title":"Analysis of Ka Band Inter-Fade Dynamics at an Indian Tropical Location","authors":"Madhura Chakraborty, S. Chakraborty, Saurabh Das","doi":"10.23919/URSI-RCRS56822.2022.10118500","DOIUrl":"https://doi.org/10.23919/URSI-RCRS56822.2022.10118500","url":null,"abstract":"Inter-fade analysis and the physical phenomena behind it has been investigated for the data of GSAT-14 satellite beacon signal at 20.2 GHz for three years (2014–2016) over the tropical location Ahmedabad (23.02 ° E, 72.51° N), India. As there is no such general model developed for interfade or inter event analysis till date, it is in great urgency to design a suitable model for that analysis of basic parameters of interfade is necessary so that in future it that can help system designers to design a suitable fade mitigation technique for signal in Ka band.","PeriodicalId":229743,"journal":{"name":"2022 URSI Regional Conference on Radio Science (USRI-RCRS)","volume":"64 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120836821","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
Point Source Carbon Dioxide Emission Monitoring Using Radiative Transfer Simulations and AVIRIS-NG Data 利用辐射传输模拟和AVIRIS-NG数据监测点源二氧化碳排放
2022 URSI Regional Conference on Radio Science (USRI-RCRS) Pub Date : 2022-12-01 DOI: 10.23919/URSI-RCRS56822.2022.10118485
Hasmukh K. Varchand, M. Pandya, Jalpesh A. Dave, Parthkumar Parmar, H. Trivedi
{"title":"Point Source Carbon Dioxide Emission Monitoring Using Radiative Transfer Simulations and AVIRIS-NG Data","authors":"Hasmukh K. Varchand, M. Pandya, Jalpesh A. Dave, Parthkumar Parmar, H. Trivedi","doi":"10.23919/URSI-RCRS56822.2022.10118485","DOIUrl":"https://doi.org/10.23919/URSI-RCRS56822.2022.10118485","url":null,"abstract":"The significant amount of Carbon Dioxide (CO2) emission causes radiative forcing in the atmosphere that increases the earth's temperature. To reduce the emission from anthropogenic activity, it is important to monitor the major sources and sinks of atmospheric CO2 such as coal-fired Thermal Power Plant (TPP). Airborne hyperspectral sensors with contiguous spectral bands have capabilities to measure point source CO2 emission. In this study, we have estimated CO2 concentration using Radiative Transfer (RT) simulations and Airborne Visible/InfraRed Imaging Spectrometer - Next Generation (AVIRIS-NG) data acquired on Maithon TPP at Jharkhand in India. Due to its higher sensitivity to the boundary layer atmosphere, the Short-Wave InfraRed (SWIR) region is most suitable for the detection of CO2 emission sources. we used a $2.0 mu mathrm{m}$ absorption band for CO2 plum detection. This paper describes the Continuum Interpolated Band Ratio (CIBR) method for measurement of CO2 concentration in the atmosphere which is emitted by TPP.","PeriodicalId":229743,"journal":{"name":"2022 URSI Regional Conference on Radio Science (USRI-RCRS)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132483361","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
Absolute calibration of NavIC reference receiver NavIC参考接收机的绝对校准
2022 URSI Regional Conference on Radio Science (USRI-RCRS) Pub Date : 2022-12-01 DOI: 10.23919/URSI-RCRS56822.2022.10118474
N. Kasat, Sortur Anand Neelappa, F. B. Singh, M. R. Raghavendra
{"title":"Absolute calibration of NavIC reference receiver","authors":"N. Kasat, Sortur Anand Neelappa, F. B. Singh, M. R. Raghavendra","doi":"10.23919/URSI-RCRS56822.2022.10118474","DOIUrl":"https://doi.org/10.23919/URSI-RCRS56822.2022.10118474","url":null,"abstract":"The NavIC (or IRNSS) reference receiver's measurement data is the basis for the generation of orbital parameters of the NavIC satellites. For ensuring accurate orbit determination, the various sources of error in ground segment need to be precisely measured and compensated. The RF/IF delays of the NavIC reference receiver are derived from its absolute calibration. The achieved accuracy level is better than 1ns. In this paper, we also present the impact of Doppler collision on the calibration process of receiver.","PeriodicalId":229743,"journal":{"name":"2022 URSI Regional Conference on Radio Science (USRI-RCRS)","volume":"2012 342","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114111661","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
A Hexagonal Slotted CPW-Fed Antenna with Parasitic Patch for Internet of Things Applications 物联网应用中带寄生贴片的六角形开槽cpw馈电天线
2022 URSI Regional Conference on Radio Science (USRI-RCRS) Pub Date : 2022-12-01 DOI: 10.23919/URSI-RCRS56822.2022.10118567
R. Devi, S. K. Prasad
{"title":"A Hexagonal Slotted CPW-Fed Antenna with Parasitic Patch for Internet of Things Applications","authors":"R. Devi, S. K. Prasad","doi":"10.23919/URSI-RCRS56822.2022.10118567","DOIUrl":"https://doi.org/10.23919/URSI-RCRS56822.2022.10118567","url":null,"abstract":"This paper presents a coplanar-waveguide fed hexagonal slotted microstrip patch antenna with a parasitic patch. This antenna has an overall dimension of $50text{mm}times 92 text{mm} times 1.6text{mm}$. The antenna performance is improved by inserting a hexagonal parasitic patch at the centre of the radiating patch. The simulated result of the proposed antenna shows multiband characteristics with frequency bands (0.8GHz - 1.04 GHz); (2.27 GHz -2.52 GHz); and (3.71 GHz - 4.11GHz) which covers wireless standards such as LoRa, Zigbee, SigFox, Wi-Fi, Bluetooth, commonly used in IoT systems. The proposed antenna is fabricated and experimentally investigated. The measured results are found to be in good agreement with the simulated results. The radiation patterns of the proposed antenna show that it is nearly omnidirectional in both E-plane and H-plane. The effects of various parameters on the antenna performance are analyzed and discussed as well.","PeriodicalId":229743,"journal":{"name":"2022 URSI Regional Conference on Radio Science (USRI-RCRS)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114430080","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
Hybrid-polarimetry Synthetic Aperture Radar for Oil-Spill Detection 用于溢油探测的混合偏振合成孔径雷达
2022 URSI Regional Conference on Radio Science (USRI-RCRS) Pub Date : 2022-12-01 DOI: 10.23919/URSI-RCRS56822.2022.10118472
Ajeet Kumar, Varsha Mishra, R. K. Panigrahi, M. Martorella
{"title":"Hybrid-polarimetry Synthetic Aperture Radar for Oil-Spill Detection","authors":"Ajeet Kumar, Varsha Mishra, R. K. Panigrahi, M. Martorella","doi":"10.23919/URSI-RCRS56822.2022.10118472","DOIUrl":"https://doi.org/10.23919/URSI-RCRS56822.2022.10118472","url":null,"abstract":"The Hybrid-polarimetry (hybrid-pol) Synthetic Aperture Radar (SAR) sensors are capable of providing: a sufficient amount of information about the surface that helps to accurately identify the oil-spill, and the reduced satellite re-visit time that helps to efficiently monitor the oil-spill and identify minor spills before they can spread out and cause widespread damage. Based on the oil-spill descriptors derived directly from the hybrid-pol Stokes vector, we evaluated the performance of hybrid-polarimetry in separating oil-spills from clean-sea areas. For the analysis, ALOS-PALSAR L-band satellite dataset, acquired over the Gulf of Mexico, is implemented.","PeriodicalId":229743,"journal":{"name":"2022 URSI Regional Conference on Radio Science (USRI-RCRS)","volume":"183 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134186252","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
A Novel 6G based Antenna System for Marine Communication 基于6G的新型海上通信天线系统
2022 URSI Regional Conference on Radio Science (USRI-RCRS) Pub Date : 2022-12-01 DOI: 10.23919/URSI-RCRS56822.2022.10118581
B. S, M. L, A. S, S. Menon
{"title":"A Novel 6G based Antenna System for Marine Communication","authors":"B. S, M. L, A. S, S. Menon","doi":"10.23919/URSI-RCRS56822.2022.10118581","DOIUrl":"https://doi.org/10.23919/URSI-RCRS56822.2022.10118581","url":null,"abstract":"The work discussed proposes a novel 6G based antenna system using Intelligent Reflecting Surface (IRS) for efficient communication over the ocean. Offshore people in travel, fishing or staying as part of their work have no facility for communication using cellular or Wi-Fi networks. Even the information about the warnings depending upon the sea states could not be passed due to the lack of an efficient communication system. So using IRS assisted MIMO systems with line of sight communication having terahertz antennas, placed on the ships/boats/fishing vessels/any other structures could ensure complete coverage and connectivity for the people offshore.","PeriodicalId":229743,"journal":{"name":"2022 URSI Regional Conference on Radio Science (USRI-RCRS)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133580430","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
Phase Controlled Electromagnetically Induced Transparency in a Closed Cyclic Lambda Atomic System 闭循环λ原子系统的相位控制电致透明
2022 URSI Regional Conference on Radio Science (USRI-RCRS) Pub Date : 2022-12-01 DOI: 10.23919/URSI-RCRS56822.2022.10118543
Monika Thakran, Yashika Aneja, S. Dubey
{"title":"Phase Controlled Electromagnetically Induced Transparency in a Closed Cyclic Lambda Atomic System","authors":"Monika Thakran, Yashika Aneja, S. Dubey","doi":"10.23919/URSI-RCRS56822.2022.10118543","DOIUrl":"https://doi.org/10.23919/URSI-RCRS56822.2022.10118543","url":null,"abstract":"In this work, Electromagnetically Induced Transparency (EIT) has been studied in a microwave driven closed cyclic Lambda atomic system. It is observed that in the absence of microwave field a normal transparency window is obtained, but when a microwave field is also applied between hyperfine levels along with the optical fields an amplification and attenuation in EIT signal is observed depending upon the relative phase between fields driving the atomic system. In fact, a new probe field is generated by microwave and coupling field which interfere constructively or destructively with incident probe field leading to either amplification, attenuation or asymmetricity in probe transmission signal. Also, dependency of phase sensitive amplification on ground state decoherence is also studied. This novel, controllable and amplified EIT signal can be potentially used for the transfer of coherent microwave analog or digital message signal over larger distance using optical fibers where amplification is preliminary requirement.","PeriodicalId":229743,"journal":{"name":"2022 URSI Regional Conference on Radio Science (USRI-RCRS)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116103817","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
Challenges involved in Design, Development, and Testing of High Power Ka Band WR-51 RF Vacuum Window 高功率Ka波段WR-51射频真空窗的设计、开发和测试
2022 URSI Regional Conference on Radio Science (USRI-RCRS) Pub Date : 2022-12-01 DOI: 10.23919/URSI-RCRS56822.2022.10118506
Vinod Kumar, Vijay Bahadur, Apurva N Patil, V. Parekh
{"title":"Challenges involved in Design, Development, and Testing of High Power Ka Band WR-51 RF Vacuum Window","authors":"Vinod Kumar, Vijay Bahadur, Apurva N Patil, V. Parekh","doi":"10.23919/URSI-RCRS56822.2022.10118506","DOIUrl":"https://doi.org/10.23919/URSI-RCRS56822.2022.10118506","url":null,"abstract":"This paper presents the design, realization, and testing of Ka-band (WR51), high power vacuum window (VW), which consists of brazed fused quartz substrate and optimized for the frequency band of 17.5-21.5 GHz. The challenges involved at the various stages during the development and testing are mentioned with all corrective measures to manage these challenges to make a better product available in the market. This Vacuum window will be used as an interface at the TVAC chamber for testing high-power passive components of communication payloads such as Diplexer, Omux, filter, OMT, PIMP filter, etc.","PeriodicalId":229743,"journal":{"name":"2022 URSI Regional Conference on Radio Science (USRI-RCRS)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129522582","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
A Perceptive Overview of Nucleus-Acoustic Waves in Degenerate Quantum Astroplasmas 简并量子天体等离子体中核声波的感知综述
2022 URSI Regional Conference on Radio Science (USRI-RCRS) Pub Date : 2022-12-01 DOI: 10.23919/URSI-RCRS56822.2022.10118454
P. K. Karmakar, Sayanti Dasgupta
{"title":"A Perceptive Overview of Nucleus-Acoustic Waves in Degenerate Quantum Astroplasmas","authors":"P. K. Karmakar, Sayanti Dasgupta","doi":"10.23919/URSI-RCRS56822.2022.10118454","DOIUrl":"https://doi.org/10.23919/URSI-RCRS56822.2022.10118454","url":null,"abstract":"We present a theoretic model formalism perspectively developed to explore the stability behavioral dynamics of the nucleus-acoustic waves (NAWs) in diversified gyrogravitating degenerate quantum astroplasmas. It evolves under the joint influence of the Bohm potential, Coriolis rotation, electrostatic confinement pressure (ECP), viscoelasticity, etc. Application of a standard normal spherical mode analysis yields a generalized linear septic dispersion law. It is interestingly found that the Coriolis rotation enhancement suppresses the NAW growth features. The adopted system is more sensitive to the rotational force than the viscoelasticity, and so forth. It is useful to study the NAWs and stability features excitable in compact astrophysical objects, like white dwarfs (WDs), brown dwarfs, neutron stars, etc.","PeriodicalId":229743,"journal":{"name":"2022 URSI Regional Conference on Radio Science (USRI-RCRS)","volume":"735 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129723962","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
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