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A Consistent Regional Vertical Ionospheric Model and Application in PPP-RTK Under Sparse Networks 稀疏网络下区域垂直电离层一致模式及其在PPP-RTK中的应用
IF 2.2 3区 地球科学
Navigation-Journal of the Institute of Navigation Pub Date : 2023-01-01 DOI: 10.33012/navi.568
S. Lyu, Yang Xiang, Tiantian Tang, Ling Pei, Wenxian Yu, T. Truong
{"title":"A Consistent Regional Vertical Ionospheric Model and Application in PPP-RTK Under Sparse Networks","authors":"S. Lyu, Yang Xiang, Tiantian Tang, Ling Pei, Wenxian Yu, T. Truong","doi":"10.33012/navi.568","DOIUrl":"https://doi.org/10.33012/navi.568","url":null,"abstract":"Ionospheric augmentation is one of the most important dependences of PPP-RTK. Because of the dispersive features of the ionosphere, the ionospheric information is usually coupled with satellite-and receiver-related biases. This will pose a hidden trouble of inconsistent ionospheric corrections if different numbers of reference stations are involved in calculation. In this paper, we aimed at introducing a consistent regional vertical ionospheric model (RVIM) by estimating receiver biases. We first presented the inconsistent ionospheric corrections under sparse networks. Then the RVIM is compared with the International GNSS Service (IGS) final global ionospheric map (GIM) product, and the average of differences between them is 1.13 TECU. Furthermore, the slant ionospheric corrections were employed as a reference to evaluate both RVIM and GIM. The mean RMS values are 1.48 and 2.23 TECU for the RVIM and GIM, respectively. Finally, we applied the RVIM into PPP-RTK. Results indicate that the PPP-RTK with RVIM constraints achieves improvements in horizontal errors, vertical errors, and convergence time by 43.45, 29.3, and 22.6% under the 68% confidence level, compared with the conventional PPP-AR.","PeriodicalId":56075,"journal":{"name":"Navigation-Journal of the Institute of Navigation","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85745124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Atom Strapdown: Toward Integrated Quantum Inertial Navigation Systems 原子捷联:迈向集成量子惯性导航系统
IF 2.2 3区 地球科学
Navigation-Journal of the Institute of Navigation Pub Date : 2023-01-01 DOI: 10.33012/navi.604
B. Tennstedt, Ashwin Rajagopalan, N. Weddig, S. Abend, S. Schön, E. Rasel
{"title":"Atom Strapdown: Toward Integrated Quantum Inertial Navigation Systems","authors":"B. Tennstedt, Ashwin Rajagopalan, N. Weddig, S. Abend, S. Schön, E. Rasel","doi":"10.33012/navi.604","DOIUrl":"https://doi.org/10.33012/navi.604","url":null,"abstract":"","PeriodicalId":56075,"journal":{"name":"Navigation-Journal of the Institute of Navigation","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72862568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Detection of GPS C/A Code Self-Interference: Monitor Overview and Applicability GPS C/A码自干扰检测:监视器概述及适用性
IF 2.2 3区 地球科学
Navigation-Journal of the Institute of Navigation Pub Date : 2023-01-01 DOI: 10.33012/navi.559
J. Belzer, F. van Graas
{"title":"Detection of GPS C/A Code Self-Interference: Monitor Overview and Applicability","authors":"J. Belzer, F. van Graas","doi":"10.33012/navi.559","DOIUrl":"https://doi.org/10.33012/navi.559","url":null,"abstract":"","PeriodicalId":56075,"journal":{"name":"Navigation-Journal of the Institute of Navigation","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76872727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Radio-Frequency Interference Considerations for Utility of the Galileo E6 Signal Based on Long-Term Monitoring by ARFIDAAS 基于ARFIDAAS长期监测的伽利略E6信号使用的射频干扰考虑
IF 2.2 3区 地球科学
Navigation-Journal of the Institute of Navigation Pub Date : 2023-01-01 DOI: 10.33012/navi.560
Aiden Morrison, N. Sokolova, Nicolai Gerrard, A. Rødningsby, C. Rost, L. Ruotsalainen
{"title":"Radio-Frequency Interference Considerations for Utility of the Galileo E6 Signal Based on Long-Term Monitoring by ARFIDAAS","authors":"Aiden Morrison, N. Sokolova, Nicolai Gerrard, A. Rødningsby, C. Rost, L. Ruotsalainen","doi":"10.33012/navi.560","DOIUrl":"https://doi.org/10.33012/navi.560","url":null,"abstract":"","PeriodicalId":56075,"journal":{"name":"Navigation-Journal of the Institute of Navigation","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79724964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Noncoherent Code Discriminator Gains for Global Navigation Satellite System Signal Tracking 全球卫星导航系统信号跟踪的非相干码鉴别增益
IF 2.2 3区 地球科学
Navigation-Journal of the Institute of Navigation Pub Date : 2023-01-01 DOI: 10.33012/navi.598
Ryan S. Cassel
{"title":"Noncoherent Code Discriminator Gains for Global Navigation Satellite System Signal Tracking","authors":"Ryan S. Cassel","doi":"10.33012/navi.598","DOIUrl":"https://doi.org/10.33012/navi.598","url":null,"abstract":"Many common discriminators used for code tracking of global navigation sat - ellite system (GNSS) signals are ratios of quadratic forms of the correlation outputs. Here we derive a general expression for the gain of this type of dis - criminator and show that it depends on the effective carrier-to-noise ratio. We then evaluate this expression for several different code discriminators and GNSS signals, including GPS C/A-code, P-code, L1C, and M-code, Galileo E1 OS, GLONASS L1OF and L2OF, and BeiDou B1I and B2I. We also determine how noise and interference saturate the discriminator (i.e., make its output less sen - sitive to changes in the input) and the resulting effect on loop bandwidth. The discriminator gains described in this paper compensate for the saturation and ensure that loop bandwidth and code tracking performance can be accurately predicted and controlled over a critical range of effective carrier-to-noise ratios.","PeriodicalId":56075,"journal":{"name":"Navigation-Journal of the Institute of Navigation","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75093364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Extending the Real-Time Kinematics Survey Method to Global Navigation Satellite System-Denied Areas Using a Low-Cost Inertial-Aided Positioning Pole 利用低成本惯性辅助定位杆将实时运动学测量方法扩展到全球导航卫星系统拒绝区域
IF 2.2 3区 地球科学
Navigation-Journal of the Institute of Navigation Pub Date : 2023-01-01 DOI: 10.33012/navi.584
Changxin Lai, Ruonan Guo, Qijin Chen, X. Niu
{"title":"Extending the Real-Time Kinematics Survey Method to Global Navigation Satellite System-Denied Areas Using a Low-Cost Inertial-Aided Positioning Pole","authors":"Changxin Lai, Ruonan Guo, Qijin Chen, X. Niu","doi":"10.33012/navi.584","DOIUrl":"https://doi.org/10.33012/navi.584","url":null,"abstract":"The global navigation satellite system (GNSS) real-time kinematics (RTK) survey method cannot be used in GNSS-denied areas largely due to signal block-age. In this work, we aim to extend high-precision RTK positioning capability to GNSS-denied areas via post-processing using an inertial-aided positioning pole that contains a inexpensive inertial measurement unit (IMU) chip and an RTK receiver. The positioning accuracy can be maintained at an acceptable level by using the pole as a walking stick with the pole periodically landing on the ground. Because the pole tip velocity is zero when it maintains contact with solid ground, lever-arm compensated zero-velocity updates (LA-ZUPTs) can be used to suppress errors in the inertial navigation system (INS) in GNSS-denied areas. Experimental results reveal that this method can be used to bridge up to a 60-meter GNSS gap to maintain sub-decimeter-level survey accuracy.","PeriodicalId":56075,"journal":{"name":"Navigation-Journal of the Institute of Navigation","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79996490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Stochastic Reachability-Based GPS Spoofing Detection with Chimera Signal Enhancement 基于随机可达性的嵌合体信号增强GPS欺骗检测
3区 地球科学
Navigation-Journal of the Institute of Navigation Pub Date : 2023-01-01 DOI: 10.33012/navi.616
Tara Mina, Ashwin Kanhere, Shreyas Kousik,, Grace Gao
{"title":"Stochastic Reachability-Based GPS Spoofing Detection with Chimera Signal Enhancement","authors":"Tara Mina, Ashwin Kanhere, Shreyas Kousik,, Grace Gao","doi":"10.33012/navi.616","DOIUrl":"https://doi.org/10.33012/navi.616","url":null,"abstract":"To provide secure navigation for civilian global positioning system (GPS) users, the Air Force Research Lab (AFRL) has developed the chips-message robust authentication (Chimera) (Anderson et al., 2017) signal enhancement for the GPS L1C signal (GPS Directorate, 2022). Chimera inserts a digital signature within both the navigation message and the pilot channels of L1C to allow civilian users to jointly authenticate both components of the signal (AFRL Space Vehicles Directorate, Advanced GPS Technology, 2019). The AFRL will broadcast and test this signal enhancement on the upcoming Navigation Technology Satellite 3 experimental platform, which will be launched in 2024 (Cozzens, 2021; Divis, 2019, AFRL, 2023). If incorporated within the GPS L1C signal, the Chimera enhancement will be the Abstract To protect civilian global positioning system (GPS) users from spoofing attacks, the U.S. Air Force Research Lab has proposed the chips-message robust authentication (Chimera) enhancement for the L1C signal. In particular, the Chimera fast channel allows users to authenticate the received GPS signal once every 1.5 or 6 s, depending on the out-of-band source utilized for receiving the fast channel marker keys. However, for many moving receiver applications, receivers often use much higher GPS measurement rates, at 5–20 Hz. In this work, we derive a stochastic reachability (SR)-based detector to perform continuous GPS signal verification and state estimation between Chimera authentications. Our SR detector validates the received GPS measurement against any self-contained sensor, such as an inertial measurement unit, in the presence of bounded biases in the sensor error distributions. We demonstrate via Monte Carlo simulations that our detector satisfies a user-defined false alarm requirement during nominal conditions, while successfully detecting a simulated spoofing attack. We further demonstrate that our SR state estimation filter successfully bounds the true state during both authentic and spoofed conditions.","PeriodicalId":56075,"journal":{"name":"Navigation-Journal of the Institute of Navigation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135361642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On GNSS Synchronization Performance Degradation under Interference Scenarios: Bias and Misspecified Cramér-Rao Bounds 干扰情况下GNSS同步性能退化:偏差和错定cram<s:1> - rao边界
IF 2.2 3区 地球科学
Navigation-Journal of the Institute of Navigation Pub Date : 2023-01-01 DOI: 10.33012/navi.606
L. Ortega, Corentin Lubeigt, J. Vilà‐Valls, É. Chaumette
{"title":"On GNSS Synchronization Performance Degradation under Interference Scenarios: Bias and Misspecified Cramér-Rao Bounds","authors":"L. Ortega, Corentin Lubeigt, J. Vilà‐Valls, É. Chaumette","doi":"10.33012/navi.606","DOIUrl":"https://doi.org/10.33012/navi.606","url":null,"abstract":"","PeriodicalId":56075,"journal":{"name":"Navigation-Journal of the Institute of Navigation","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89450325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Detecting GNSS Jamming and Spoofing on Android Devices 检测GNSS干扰和欺骗的Android设备
IF 2.2 3区 地球科学
Navigation-Journal of the Institute of Navigation Pub Date : 2022-01-01 DOI: 10.33012/navi.537
Nicholas Spens, Dong-Kyeong Lee, Filip Nedelkov, D. Akos
{"title":"Detecting GNSS Jamming and Spoofing on Android Devices","authors":"Nicholas Spens, Dong-Kyeong Lee, Filip Nedelkov, D. Akos","doi":"10.33012/navi.537","DOIUrl":"https://doi.org/10.33012/navi.537","url":null,"abstract":"Global navigation satellite system (GNSS) location engines on Android devices provide location and navigation utility to billions of people worldwide. However, these location engines currently have very limited protection from threats to their position, navigation, and time (PNT) solutions. External sources of radio frequency interference (RFI) can render PNT information unusable. Even worse, false signals or spoofing can provide a false PNT solution to Android devices. To mitigate this, four detection methods were developed and evaluated using native location parameters within Android: Comparing the GNSS and network locations, checking the Android mock location flag, comparing the GNSS and Android system times, and observing the automatic gain control (AGC) and carrier-to-noise density (C/N 0 ) signal metrics. These methods provide a powerful means to significantly increase the robustness of the Android GNSS-based PNT solution and are implemented in the GNSSAlarm Android application to demonstrate real-time jamming and spoofing detection.","PeriodicalId":56075,"journal":{"name":"Navigation-Journal of the Institute of Navigation","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72376859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
TrackMe—A Hybrid Radio-Optical System for Assets Localization in Industry 4.0 Plants trackme -一种用于工业4.0工厂资产定位的混合无线电光学系统
IF 2.2 3区 地球科学
Navigation-Journal of the Institute of Navigation Pub Date : 2022-01-01 DOI: 10.33012/navi.524
K. Staniec, M. Kowal, S. Kubal, P. Piotrowski
{"title":"TrackMe—A Hybrid Radio-Optical System for Assets Localization in Industry 4.0 Plants","authors":"K. Staniec, M. Kowal, S. Kubal, P. Piotrowski","doi":"10.33012/navi.524","DOIUrl":"https://doi.org/10.33012/navi.524","url":null,"abstract":"","PeriodicalId":56075,"journal":{"name":"Navigation-Journal of the Institute of Navigation","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85458213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","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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