2020 European Navigation Conference (ENC)最新文献

{"title":"A Frequency Agile Dual-Band GNSS Receiver Front End with Anti-Jamming Capabilities","authors":"Faisal Ilyas, S. Irteza, N. Shoaib, H. M. Cheema","doi":"10.23919/ENC48637.2020.9317433","DOIUrl":"https://doi.org/10.23919/ENC48637.2020.9317433","url":null,"abstract":"This paper presents a dual-band RF front-end for single antenna based GNSS receivers with the capability of detecting and mitigating in-band interference signals. The front-end is composed of a diplexer, a low noise amplifier, RF detectors and switchable filtering banks. A central control unit provides active smart filtering to protect the receiver from interferences by enabling two sub-bands in the lower GNSS band (1165 – 1248 MHz) and one sub-band in the upper GNSS band (1559 – 1610 MHz) as per requirement. The frontend achieves a gain of more than 35dB and out-of-band rejection better than 60 dB and is suitable for GNSS systems including GPS, GLONASS, Galileo and Beidou.","PeriodicalId":157951,"journal":{"name":"2020 European Navigation Conference (ENC)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131431507","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}

{"title":"SINS/GNSS Aided by Autonomous AHRS for a Small UAV","authors":"V. I. Kulakova, Aleksandr O. Markov, A. Y. Sokharev","doi":"10.23919/ENC48637.2020.9317381","DOIUrl":"https://doi.org/10.23919/ENC48637.2020.9317381","url":null,"abstract":"The paper is devoted to the development of a navigation system for an accurate attitude determination and high-precision positioning of a small-sized UAV. The navigation system consists of a single GNSS receiver and a MEMS inertial measurement system which includes gyroscopes and accelerometers, along with magnetometers and a pressure sensor. The three-axis-magnetometer is utilized to improve heading/yaw estimation. Since the magnetometer is strongly corrupted by time-varying distortions, it is proposed not to integrate it with the SINS/GNSS system, but to build an autonomous AHRS as an independent source of orientation based on accelerometers, gyroscopes, barometer and magnetic data. The proposed AHRS uses two spaced three-axis magnetometers which are continuously calibrated throughout the flight, performs compensation of the UAV's own dynamics and applies the barometer measurements to improve roll and pitch angles estimation. The SINS/GNSS system utilizes the AHRS data for heading estimation, fast alignment and validation of the navigation solution. Presented flight test results have shown that the developed navigation system, having a smaller weight and cost, provides comparable accuracy in terms of attitude determination including heading, as a SINS/GNSS compass system. At the same time, the proposed system has greater autonomy, interference immunity and reliability. In addition, the use of adaptive antenna array for protection of the GNSS receiver allows the navigation system to operate in strong radio frequency interference environments.","PeriodicalId":157951,"journal":{"name":"2020 European Navigation Conference (ENC)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133993432","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}

{"title":"Geo-Distributed Simulation and Verification Infrastructure for safe train Galileo-based positioning","authors":"C. Stallo, A. Neri, P. Salvatori, F. Rispoli, O. Desenfans, J. Marais, Antonio Aguila, Beatriz Sierra, Ricardo Campo, Daniel Molina, Susana Herranz, Xavier Leblan, G. Rotondo","doi":"10.23919/ENC48637.2020.9317431","DOIUrl":"https://doi.org/10.23919/ENC48637.2020.9317431","url":null,"abstract":"The work shows the high level concept and methodology followed for designing a geo-distributed simulation and verification infrastructure connecting remotely GNSS excellence centres and ERTMS/ETCS laboratories to evaluate the GNSS performances in the railway environment. Proper methodology and tools are adopted to simulate GNSS behaviour in different railway scenarios in nominal or in presence of global and local hazards. Particularly, the test-bed main goals are: i) achieving a realistic characterization of the environment in terms of railway and GNSS infrastructures able to evaluate the performances and properties of some fail-safe train positioning components in nominal and fault conditions; ii) defining a common test process framework for zero on-site testing instead of testing on-site saving effort and time. The test-bed offers the unique advantage to stress the global system in presence of very rare GNSS fault events instead of performing long and expensive measurement campaigns on field for detecting them and analysing their impact on ETCS. The work will show its description and the methodology adopted for its design and implementation.","PeriodicalId":157951,"journal":{"name":"2020 European Navigation Conference (ENC)","volume":"252 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115616080","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}

{"title":"Evaluation of Network Real Time Kinematics contribution to the accuracy/productivity ratio for UAS-SfM Photogrammetry","authors":"Stamatia Panagiotopoulou, Athanasia Erkeki, Antonios Antonakakis, Panagiotis Grigorakakis, Vasiliki Protopapa, Georgios Tsiostas, K. Vlachou, E. Vassilakis","doi":"10.23919/ENC48637.2020.9317482","DOIUrl":"https://doi.org/10.23919/ENC48637.2020.9317482","url":null,"abstract":"The improvement of the accuracy of Structure-from-Motion photogrammetric products is discussed in this paper. In most cases it depends on the number and distribution of ground control points (GCPs) for block orientation, although the placement and precise measuring of GCPs are often time-consuming in a UAS project. This paper presents the evaluation of two approaches including Post Process Kinematic (PPK) and Network Real Time Kinematic (NRTK) methods aiming to avoid GCPs establishment, taking advantage of a real time positioning service, where differential corrections are sent from a network of Reference stations directly to the UAS.","PeriodicalId":157951,"journal":{"name":"2020 European Navigation Conference (ENC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114522965","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}

{"title":"GNSS Signal Quality Monitoring Based on a Reference Station Network","authors":"S. Nikolskiy, A. Bredenbeck, Topi Rikkinen, J. Vallet, Michelle Koivisto, Salomon Honkala, M. Z. H. Bhuiyan, S. Thombre","doi":"10.23919/ENC48637.2020.9317361","DOIUrl":"https://doi.org/10.23919/ENC48637.2020.9317361","url":null,"abstract":"This paper analyzed the feasibility of development of a GNSS signal quality monitoring system that utilizes observation data provided by a reference station network. We present an overview of possible data sources and analysis techniques that can be used. The details about the software prototype developed are provided. Finally, we elaborate on the system scalability and the steps to extend the capabilities.","PeriodicalId":157951,"journal":{"name":"2020 European Navigation Conference (ENC)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115147099","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}

{"title":"Changing from Magnetic to True Tracks in Aviation","authors":"Bart Banning, Anthony Mackay, Paul Hickley","doi":"10.23919/ENC48637.2020.9317517","DOIUrl":"https://doi.org/10.23919/ENC48637.2020.9317517","url":null,"abstract":"The use of the magnetic compass and magnetic North as the main reference in aircraft navigation in this era leads to avoidable costs and possible safety issues. A proposal is presented to change to GNSS based true tracks and headings, including a way forward for an internationally aligned transition strategy. Latest results of research in this field and of coordinating actions with international bodies are presented.","PeriodicalId":157951,"journal":{"name":"2020 European Navigation Conference (ENC)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121859385","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}

{"title":"Infield Agriculture GNSS Assessment Showing EGNOS Benefits","authors":"James Bruzual, E. Lacarra, Clayton Post, Joaquín Reyes González","doi":"10.23919/ENC48637.2020.9317328","DOIUrl":"https://doi.org/10.23919/ENC48637.2020.9317328","url":null,"abstract":"This article aims at presenting EGNOS (European Geostationary Navigation Overlay Service) performance computed by a GNSS receiver on board of an agriculture tractor equipped with Topcon auto-steering system where farmer planted pistachios trees in a large field within Ávila province, Spain. This article will assess the EGNOS performance in which the tractor followed the pattern defined by Topcon GNSS product for several days. Apart from the inboard auto-steering system, other types of receivers have been installed to compute the navigation position based on EGNOS. Besides EGNOS, other GNSS solutions were used for the same scenario considering different combinations of constellations (GPS, GLONASS and GALILEO) and frequencies (L1/E1, L2 and L5/E5). The results aim at confirming that EGNOS provides an added value with respect to GNSS standalone solutions, concluding which farm applications are suitable for the obtained performances.","PeriodicalId":157951,"journal":{"name":"2020 European Navigation Conference (ENC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121290388","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}

{"title":"Measurement Methods for Train Localization with Onboard Sensors","authors":"O. Heirich, B. Siebler, S. Sand, A. Lehner, Omar García Crespillo","doi":"10.23919/ENC48637.2020.9317435","DOIUrl":"https://doi.org/10.23919/ENC48637.2020.9317435","url":null,"abstract":"Real-time train localization with onboard mounted sensors is a basis for future railway applications. In contrast to infrastructure based train localization with way-side sensors, the onboard train localization uses only train-side sensors and a digital map of the railway tracks. Therefore, the trains are equipped with sensors, e.g. near the train-front and near the train-end. The train-front location and the train-end location are determined on the tracks in track coordinates with absolute train localization methods. A distance on tracks between two locations is determined with relative localization methods. This distance on the tracks can be used to monitor the train length and also to observe the distance between trains. This paper contains an overview of different measurement methods for speed measurement, absolute train localization and relative train localization based on GNSS (Global Navigation Satellite System), IMU (Inertial Measurement Unit), magnetometers and RF (radio frequency) ranging.","PeriodicalId":157951,"journal":{"name":"2020 European Navigation Conference (ENC)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133680075","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}

{"title":"End-to-End ARAIM demonstrator: magicARAIM suite","authors":"Guillermo Fernández, J. G. Pericacho, Konrad Janicki, José Celada, Fernando Bravo, M. Fernández, David Rodríguez, V. M. Esteban, J. Barrios","doi":"10.23919/ENC48637.2020.9317520","DOIUrl":"https://doi.org/10.23919/ENC48637.2020.9317520","url":null,"abstract":"Currently, ABAS (aircraft based augmentation system) is covered by RAIM (Receiver Autonomous Integrity Monitoring), which allows assuring the integrity of the navigation information received by the aircraft from GPS satellites for non-precision approach services. The receivers perform integrity checks considering a set of fixed assertions regarding the nominal performances and probability of faults for single-frequency GPS satellites. ARAIM (Advanced Receiver Autonomous Integrity Monitoring) solution consists of an evolution of the traditional RAIM concept providing a mechanism to update the information related to the fault rates of GNSS core constellations. To compute this information, a ground segment infrastructure shall be responsible for monitoring the GNSS constellations, computing and codifying the ARAIM integrity support message or ISM. ARAIM service expands the traditional single-constellation, single-frequency RAIM solution towards a world-wide and the multi-constellation, dual-frequency receiver concept. Different ARAIM architectures have been defined: •Horizontal ARAIM. This service aims to support horizontal navigation (RNP 0.3 and RNP 0.1). The ISM generation is based on an off-line monitoring used to establish trust in the constellation performance. Horizontal ARAIM ISM parameters are not considered to change over short time scales (~1 year). •Off-line ARAIM. This service aims to support horizontal and vertical navigation down to LPV-200. It uses the same ISM parameters as horizontal ARAIM with higher update (~1 month) and a similar user algorithm extended to provide vertical guidance. •On-line ARAIM to support horizontal and vertical navigation down to LPV-200. Additional to the same integrity and fault rates information as the other ARAIM services, the ISM message contains corrections to ephemeris and clock data broadcast by the core GNSS constellations. The transmission of corrections means that the ISM information is no longer the error characterization of the GNSS constellation but that of the ARAIM service. In this context, GMV has developed the magicARAIM suit. The platform covers the ISM generation, performance monitoring and a user terminal. As a consequence, it provides an end-to-end testbed environment capable of supporting trade-offs oriented both to the development of the ARAIM service (including Off-line and On-line ARAIM) and its user segment. At this respect, the present paper aims to: •Introduce and present the different ARAIM services. •Describe magicARAIM end-to-end platform, including the ISM generation and the associated analysis tools. •Present the different experimentation performed using magicARAIM suite. •Present achievable performances for an Off-line ARAIM experimentation, including data acquisition, data processing and result analysis. •Present achievable performances when running experimentations with the platform and considering GPS and GALILEO dual-frequency scenarios based on RT CORS stations process","PeriodicalId":157951,"journal":{"name":"2020 European Navigation Conference (ENC)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130632365","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}

{"title":"A Promising Distributed Position and Orientation System with Flexible Baseline for Array SAR Applications","authors":"Yanhong Liu, X. Ning, Jianli Li, Wen Ye, Chunyu Qu","doi":"10.23919/ENC48637.2020.9317319","DOIUrl":"https://doi.org/10.23919/ENC48637.2020.9317319","url":null,"abstract":"Array Synthetic Aperture Radar (SAR), Interferometric Synthetic Aperture Radar (InSAR) and multi-task imaging sensors are the most attractive development directions in the field of high resolution earth observation. Distributed Position and Orientation System (DPOS) can measure accurately multi-node motion information with transfer alignment, which further advances efficiency and quality of imaging sensors. In practical case, influenced by external disturbance, the performance of transfer alignment is restricted by flexible deformation between master system and slave system. Aiming at this problem, this paper proposes a promising DPOS with flexible baseline. The flexible deformation between master system and slave system is obtained by vision measurement system. The high-precision motion parameters of the master system compensated by flexible deformation are provided for each slave system as reference, and transfer alignment with position-velocity-attitude matching is applied.","PeriodicalId":157951,"journal":{"name":"2020 European Navigation Conference (ENC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130703486","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}