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GNSS degradation model in presence of continuous wave and pulsed interference 存在连续波和脉冲干扰的GNSS退化模型
Annual of Navigation Pub Date : 2021-01-12 DOI: 10.1002/NAVI.405
A. Garcia‐Pena, O. Julien, C. Macabiau, M. Mabilleau, P. Durel
{"title":"GNSS degradation model in presence of continuous wave and pulsed interference","authors":"A. Garcia‐Pena, O. Julien, C. Macabiau, M. Mabilleau, P. Durel","doi":"10.1002/NAVI.405","DOIUrl":"https://doi.org/10.1002/NAVI.405","url":null,"abstract":"In the Global Navigation Satellite System (GNSS) L5/E5a interference environment, RTCA DO-292 proposes a model to compute the C/N0 degradation due to the presence of interference signals, such as Distance Measuring Equipment/TACtical Air Navigation (DME/TACAN), Joint Tactical Information Distribution System/Multifunctional Information Distribution System (JTIDS/MIDS), etc., and due to the application of a temporal blanker to mitigate their impact. The C/N0 degradation is modeled as a function of the blanker duty cycle, bdc, and the equivalent noise-level contribution of the non-blanked interference, RI. However, in RTCA DO-292, the computation of these two terms has a reduced accuracy since a general statistical model of signal pulse collisions and an overbounded flat post-blanker pulsed interference signal Power Spectrum Density (PSD) are assumed. In this paper, the limitations of the applied pulse collisions mathematical model are commented, and the use of true post-blanker pulsed interference signal PSD is introduced through the application of the spectral separation coefficient. As a result, more accurate new formulas for RI and C/N0 degradation are derived. The new formulas are verified through simulations for DME/TACAN signals.","PeriodicalId":30601,"journal":{"name":"Annual of Navigation","volume":"68 1","pages":"75-91"},"PeriodicalIF":0.0,"publicationDate":"2021-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/NAVI.405","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49654700","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
大型コンテナ船の必要舵面積について －(その1)主要目及び操縦性指数の推定－ 关于大型集装箱船所需的舵面积-(一)主要目的和操纵性指数的估计-
Annual of Navigation Pub Date : 2021-01-01 DOI: 10.18949/JINNAVI.216.0_57
俊介 佐久間
{"title":"大型コンテナ船の必要舵面積について －(その1)主要目及び操縦性指数の推定－","authors":"俊介 佐久間","doi":"10.18949/JINNAVI.216.0_57","DOIUrl":"https://doi.org/10.18949/JINNAVI.216.0_57","url":null,"abstract":"","PeriodicalId":30601,"journal":{"name":"Annual of Navigation","volume":"216 1","pages":"57-64"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68079748","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
Actual Situation and Future Prospective of Gender Equality and W L B in the Maritime Shipping Industry ：Deconstructing and Improving the Organizational Culture and Ideology 航运业性别平等与性别平等的现状与未来展望:组织文化与意识形态的解构与完善
Annual of Navigation Pub Date : 2021-01-01 DOI: 10.18949/JINNAVI.216.0_65
Ishida Yoriko, Maehata Kohei
{"title":"Actual Situation and Future Prospective of Gender Equality and W L B in the Maritime Shipping Industry ：Deconstructing and Improving the Organizational Culture and Ideology","authors":"Ishida Yoriko, Maehata Kohei","doi":"10.18949/JINNAVI.216.0_65","DOIUrl":"https://doi.org/10.18949/JINNAVI.216.0_65","url":null,"abstract":"","PeriodicalId":30601,"journal":{"name":"Annual of Navigation","volume":"216 1","pages":"65-76"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68079848","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
大型クルーズ船における海難の解析 ～コスタ・コンコルディア海難事例～ 大型邮轮海难解析~科斯塔·康科迪亚海难案例
Annual of Navigation Pub Date : 2021-01-01 DOI: 10.18949/JINNAVI.215.0_49
大下 博弥
{"title":"大型クルーズ船における海難の解析 ～コスタ・コンコルディア海難事例～","authors":"大下 博弥","doi":"10.18949/JINNAVI.215.0_49","DOIUrl":"https://doi.org/10.18949/JINNAVI.215.0_49","url":null,"abstract":"","PeriodicalId":30601,"journal":{"name":"Annual of Navigation","volume":"215 1","pages":"49-49"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68079991","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
JRCS Digital Innovation LABの紹介 JRCS数字创新实验室介绍
Annual of Navigation Pub Date : 2021-01-01 DOI: 10.18949/JINNAVI.216.0_44
和昌 中野
{"title":"JRCS Digital Innovation LABの紹介","authors":"和昌 中野","doi":"10.18949/JINNAVI.216.0_44","DOIUrl":"https://doi.org/10.18949/JINNAVI.216.0_44","url":null,"abstract":"","PeriodicalId":30601,"journal":{"name":"Annual of Navigation","volume":"216 1","pages":"44-45"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68080078","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
理事（和文論文審査）就任にあたって 就任理事(中文论文审查)之际
Annual of Navigation Pub Date : 2021-01-01 DOI: 10.18949/JINNAVI.216.0_1
昌志 藤本
{"title":"理事（和文論文審査）就任にあたって","authors":"昌志 藤本","doi":"10.18949/JINNAVI.216.0_1","DOIUrl":"https://doi.org/10.18949/JINNAVI.216.0_1","url":null,"abstract":"","PeriodicalId":30601,"journal":{"name":"Annual of Navigation","volume":"216 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68080046","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
Novel partial correlation method algorithm for acquisition of GNSS tiered signals 一种新的GNSS分层信号采集偏相关算法
Annual of Navigation Pub Date : 2020-12-01 DOI: 10.1002/NAVI.390
J. Svatoň, F. Vejražka, P. Kubalík, Jan H. Schmidt, Jaroslav Borecký
{"title":"Novel partial correlation method algorithm for acquisition of GNSS tiered signals","authors":"J. Svatoň, F. Vejražka, P. Kubalík, Jan H. Schmidt, Jaroslav Borecký","doi":"10.1002/NAVI.390","DOIUrl":"https://doi.org/10.1002/NAVI.390","url":null,"abstract":"This paper presents a new modified Single Block Zero-Padding (mSBZP) Partial Correlation Method (PCM) Parallel Code Search (PCS) algorithm for effective acquisition of weak GNSS tiered signal using coherent processing of its secondary code (SC) component. Two problems are discussed: acquisition of primary codes with a longer period using FFT blocks of limited length, and the utilization of PCS in the presence of SC bit transition.\u0000\u0000The PCM and SC bit transition forms parasitic fragments in the Cross-Ambiguity-Function (CAF) to devaluate signal detection performance. A novel analysis of this mechanism and its impact is presented. A novel mSBZP-PCM-PCS algorithm is proposed, which does not degrade the CAF. Then, the algorithm is combined with SC bit transition removal schema and sequential search to construct an estimator for weak tiered signal acquisition.\u0000\u0000The performance of the method is demonstrated by analysis and computer simulation using Galileo E1C and GPS L1C-P signals.","PeriodicalId":30601,"journal":{"name":"Annual of Navigation","volume":"67 1","pages":"745-762"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/NAVI.390","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45751622","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
GNSS signal phase, TEC, and phase unwrapping errors GNSS信号相位、TEC和相位展开误差
Annual of Navigation Pub Date : 2020-12-01 DOI: 10.1002/navi.396
C. Rino, Brian Breitsch, Y. Morton, Dongyang Xu, C. Carrano
{"title":"GNSS signal phase, TEC, and phase unwrapping errors","authors":"C. Rino, Brian Breitsch, Y. Morton, Dongyang Xu, C. Carrano","doi":"10.1002/navi.396","DOIUrl":"https://doi.org/10.1002/navi.396","url":null,"abstract":"Precise measurements of signal phase are essential for Global Navigation Satellite System (GNSS) position estimates. However, propagation through the earth's ionosphere imposes frequency-dependent phase errors. The frequency dependence is exploited to correct phase errors proportional to total electron content (TEC) divided by frequency. Scintillation causes additional stochastic errors, which can become the largest phase error contribution. Both geometry-free (GFCs) and ionosphere-free (IFCs) frequency combinations are subject to such uncorrectable but generally small phase scintillation errors. A recent published study compared GPS TEC estimates derived from nominally identical L1-L2 and L1-L5 GFCs. The TEC errors establish an upper bound on uncorrelated single-frequency scintillation error contributions. The measured TEC errors were verified with phase-screen simulations. However, a known but largely overlooked phase unwrapping error affects the extraction of signal phase from phase-screen complex signal realizations. This paper demonstrates a procedure for detecting and correcting phase-unwrapping errors and discusses their ramifications.","PeriodicalId":30601,"journal":{"name":"Annual of Navigation","volume":"67 1","pages":"865-873"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/navi.396","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45316901","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
A collocation framework to retrieve tropospheric delays from a combination of GNSS and InSAR 从GNSS和InSAR组合中检索对流层延迟的配置框架
Annual of Navigation Pub Date : 2020-11-04 DOI: 10.1002/navi.398
Endrit Shehaj, K. Wilgan, O. Frey, A. Geiger
{"title":"A collocation framework to retrieve tropospheric delays from a combination of GNSS and InSAR","authors":"Endrit Shehaj, K. Wilgan, O. Frey, A. Geiger","doi":"10.1002/navi.398","DOIUrl":"https://doi.org/10.1002/navi.398","url":null,"abstract":"High spatio-temporal variability of atmospheric water vapor affects microwave signals of Global Navigation Satellite Systems (GNSS) and Interferometric Synthetic Aperture Radar (InSAR). A better knowledge of the distribution of water vapor improves both GNSS- and InSAR-derived data products. In this work, we present a collocation framework to combine and retrieve zenith and (relative) slant tropospheric delays. GNSS and InSAR meteorological products are combined aiming at a better retrieval of the atmospheric water vapor. We investigate the combination approach with synthetic and real data acquired in the Alpine region of Switzerland. Based on a closed-loop validation with simulated delays, a few mm accuracy is achieved for the GNSS-InSAR combination in terms of retrieved ZTDs. Furthermore, when real delays are collocated, the combination results are more congruent with InSAR computed products. This research is a contribution to improve the spatio-temporal mapping of tropospheric delays by combining GNSS-derived and InSAR-derived delays.","PeriodicalId":30601,"journal":{"name":"Annual of Navigation","volume":"67 1","pages":"823-842"},"PeriodicalIF":0.0,"publicationDate":"2020-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/navi.398","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41741084","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
Sensitivity Analysis of Precision Inertial Sensor‐based Navigation System (SAPIENS) 基于精密惯性传感器的导航系统(SAPIENS)灵敏度分析
Annual of Navigation Pub Date : 2020-10-31 DOI: 10.1002/navi.397
Rachit Bhatia, D. Geller
{"title":"Sensitivity Analysis of Precision Inertial Sensor‐based Navigation System (SAPIENS)","authors":"Rachit Bhatia, D. Geller","doi":"10.1002/navi.397","DOIUrl":"https://doi.org/10.1002/navi.397","url":null,"abstract":"The future of deep space exploration depends upon technological advancement towards improving spacecraft's autonomy and versatility. This study aims to examine the feasibility of autonomous orbit determination using advanced accelerometer measurements. The objective of this research is to ascertain specific sensor requirements to meet pre-defined mission navigation error budgets. Traditional inertial navigation (dead reckoning and external aiding) is not considered. Instead, measurements from pairs of advanced, highly sensitive accelerometers (e.g., cold atom accelerometers) are used onboard to determine gravity field gradients, which are then correlated to onboard gravity maps and used to determine orbital information. Linear Covariance Theory helps to efficiently conduct an error budget analysis of the system. This error budget analysis helps to determine the effect of specific error sources in the sensor measurements, thereby providing information to rank and compare relevant sensor parameters and determine an optimal sensor configuration for a given space mission. The procedure is repeated to evaluate different accelerometer configurations and sensor parameters.","PeriodicalId":30601,"journal":{"name":"Annual of Navigation","volume":"67 1","pages":"795-822"},"PeriodicalIF":0.0,"publicationDate":"2020-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/navi.397","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41351063","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
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