Journal of Navigation最新文献_第7页

Web-based nautical charts automated compilation from open hydrospatial data 基于web的海图自动编译从开放的水文空间数据

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2022-06-27 DOI: 10.1017/S0373463322000327

Stilianos Contarinis, B. Nakos, L. Tsoulos, Athanasios Palikaris

{"title":"Web-based nautical charts automated compilation from open hydrospatial data","authors":"Stilianos Contarinis, B. Nakos, L. Tsoulos, Athanasios Palikaris","doi":"10.1017/S0373463322000327","DOIUrl":"https://doi.org/10.1017/S0373463322000327","url":null,"abstract":"Abstract Electronic navigational charts (ENCs) are specialised geospatial datasets, issued by or on the authority of a government or hydrographic office, in accordance with the International Hydrographic Organisation's (IHO) standards, specifications and symbol sets. The datasets generally comprise encoded information collected from hydrographic surveys, aimed primarily at the safety of navigation. Most ENCs are not openly available, since the encrypted datasets can be acquired through various license schemes via a centralised distribution network coordinated by two organisations operating on behalf of the coastal states that produce them. This paper describes a methodology and an integrated system developed at the National Technical University of Athens Cartography Laboratory for the generation of web-based nautical charts utilising open data and free software. The system compiles nautical charts compliant with IHO's S-101 latest standard; using open hydrospatial data retrieved from marine spatial data infrastructures (MSDI) and other qualified volunteered geographic information (VGI) sources. Open-source geospatial libraries and web-map vector technologies are used to build the system components and software scripts developed to enable automated compilation. The study also discusses how the system can be improved further by leveraging web services for end-to-end process automation and satellite-derived bathymetry for accurate depiction of seabed topography in low-depth areas.","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":"75 1","pages":"763 - 783"},"PeriodicalIF":2.4,"publicationDate":"2022-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49056650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Rapid star identification algorithm for fish-eye camera based on PPP/INS assistance 基于PPP/INS辅助的鱼眼相机快速星识别算法

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2022-06-13 DOI: 10.1017/S0373463322000285

Chonghui Li, Yuanxi Yang, Guorui Xiao, Zhanglei Chen, Shuai Tong, Zihao Liu

{"title":"Rapid star identification algorithm for fish-eye camera based on PPP/INS assistance","authors":"Chonghui Li, Yuanxi Yang, Guorui Xiao, Zhanglei Chen, Shuai Tong, Zihao Liu","doi":"10.1017/S0373463322000285","DOIUrl":"https://doi.org/10.1017/S0373463322000285","url":null,"abstract":"Abstract The fish-eye star sensor with a field of view (FOV) of 180° is an important piece of equipment for attitude determination, which improves the visibility of stars significantly. However, it also brings the star identification (star-ID) difficulties because of imprecise calibrations. Thus, a fish-eye star-ID algorithm supported by the integration of the precise point positioning/inertial navigation system (PPP/INS) is proposed. At first, a reference star map is generated in combination with the distortion model of the fish-eye camera based on the position and attitude information from the PPP/INS. Then the star points are extracted in a specific neighbourhood of the reference star points. Subsequently, the extracted star points are individually tested and identified according to angular distance error. Finally, the real-time precise attitude is determined based on the star-ID results. Experimental results show that, 270–310 stars can be identified in a fish-eye star map with an average time of 0.03 s if the initial attitude error is smaller than 1.5° and an attitude determination accuracy better than 10″ can be achieved by support from PPP/INS.","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":"75 1","pages":"928 - 945"},"PeriodicalIF":2.4,"publicationDate":"2022-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44186552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A fast and accurate transfer alignment method without relying on the empirical model of angular deformation 一种不依赖于角变形经验模型的快速准确传递对准方法

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2022-06-01 DOI: 10.1017/S0373463322000261

Jie Yang, Xinlong Wang, Xiaokun Ding, Qing Wei, Liangliang Shen

{"title":"A fast and accurate transfer alignment method without relying on the empirical model of angular deformation","authors":"Jie Yang, Xinlong Wang, Xiaokun Ding, Qing Wei, Liangliang Shen","doi":"10.1017/S0373463322000261","DOIUrl":"https://doi.org/10.1017/S0373463322000261","url":null,"abstract":"Abstract This paper, in allusion to the limitations of traditional transfer alignment methods based on the external measurement equipment or the empirical model of angular deformation, proposes a rapid and accurate transfer alignment method without relying on the empirical angular deformation model. Firstly, the relationship between the actual angular deformation and the angular velocities measured by the gyroscopes in the master and slave inertial navigation systems (INSs) is derived to roughly estimate the angular deformation. Secondly, according to the error characteristics of gyroscopes, the error model of angular deformation is established. Thirdly, expanding the angular deformation error instead of the installation error angle, flexure angle and flexure angle rate into the state vector, a low-order transfer alignment filtering model independent of the empirical angular deformation model is established. The proposed method not only gets rid of the dependence on an empirical angular deformation model, but also realises the rapid and accurate initial alignment of the slave INS without adding any external measurement equipment. The simulations and experiments evidence the validity of the proposed transfer alignment method.","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":"75 1","pages":"878 - 900"},"PeriodicalIF":2.4,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42726764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","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 hybrid observation prediction methodology for bridging GNSS outages in INS/GNSS systems 一种新的混合观测预测方法，用于弥补INS/GNSS系统中的GNSS中断

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2022-05-23 DOI: 10.1017/S037346332200025X

Linzhouting Chen, Zhanchao Liu, Jiancheng Fang

引用次数: 3

Study on site selection for a cruise home port in the Yangtze River Delta region from the perspective of safety 基于安全视角的长三角邮轮母港选址研究

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2022-05-23 DOI: 10.1017/S0373463322000169

Zhaoqian Su, Yingjie Xiao

引用次数: 0

Robust stereo visual odometry: A comparison of random sample consensus algorithms based on three major hypothesis generators 鲁棒立体视觉里程计:基于三种主要假设生成器的随机样本一致性算法的比较

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2022-05-12 DOI: 10.1017/S0373463322000236

Guangzhi Guo, Zuoxiao Dai, Yuanfeng Dai

{"title":"Robust stereo visual odometry: A comparison of random sample consensus algorithms based on three major hypothesis generators","authors":"Guangzhi Guo, Zuoxiao Dai, Yuanfeng Dai","doi":"10.1017/S0373463322000236","DOIUrl":"https://doi.org/10.1017/S0373463322000236","url":null,"abstract":"Abstract Almost all robust stereo visual odometry work uses the random sample consensus (RANSAC) algorithm for model estimation with the existence of noise and outliers. To date, there have been few comparative studies to evaluate the performance of RANSAC algorithms based on different hypothesis generators. In this work, we analyse and compare three popular and efficient RANSAC schemes. They mainly differ in using the two-dimensional (2-D) data points measured directly and the three-dimensional (3-D) data points inferred through triangulation. This comparison presents several quantitative experiments intended for comparing the accuracy, robustness and efficiency of each scheme under varying levels of noise and different percentages of outlier conditions. The results suggest that in the presence of noise and outliers, the perspective-three-point RANSAC provides more accurate and robust pose estimates. However, in the absence of noise, the iterative closest point RANSAC obtains better results regardless of the percentage of outliers. Efficiency, in terms of the number of RANSAC iterations, is found in that the relative speed of the perspective-three-point RANSAC becomes superior under low noise levels and low percentages of outlier conditions. Otherwise, the iterative closest-point RANSAC may be computationally more efficient.","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":"75 1","pages":"1298 - 1309"},"PeriodicalIF":2.4,"publicationDate":"2022-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44982168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A review of flight trajectory optimisations 飞行轨迹优化的回顾

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2022-05-01 DOI: 10.1017/S0373463322000248

O. Pleter, C. Constantinescu

{"title":"A review of flight trajectory optimisations","authors":"O. Pleter, C. Constantinescu","doi":"10.1017/S0373463322000248","DOIUrl":"https://doi.org/10.1017/S0373463322000248","url":null,"abstract":"Abstract The paper reviews the optimisation methods of the flight trajectory for airliners. In contrast to maritime navigation, where the shortest route (the orthodrome) is preferred, in air navigation, the brachistochrone is the optimal flight trajectory on the sphere or on the ellipsoid, considering the wind vector field (maximising the tail wind and minimising the head wind over the duration of the flight). The major impact of the wind on the flight trajectory results from the possible significant velocity at the normal cruise flight levels, which could reach 200 kts, or 40% of the aircraft true airspeed (TAS). Brachistochrone is independent of the flight performance optimisation (range versus speed), as computed by the flight management system. Whichever cost index (CI) is selected (and consequently, the cruise Mach number), the brachistochrone is the minimum time of flight trajectory at that target Mach number. In cruise flight, the minimum time of flight is also equivalent to the minimum fuel consumption. It concerns just the wind velocity field. All these qualify the brachistochrone as the greenest trajectory, the most fuel and emissions efficient solution relative to the atmosphere. The paper classifies the brachistochrone problems (2D, 3D and 4D brachistochrones, with or without flexible time of departure). Some numerical examples are provided. The overall optimal 4D trajectory considers many aspects, including safety, by minimisation of total costs and risks of the 4D trajectory.","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":"75 1","pages":"646 - 661"},"PeriodicalIF":2.4,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45742681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

NAV volume 75 issue 3 Cover and Back matter NAV第75卷第3期封面和封底

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2022-05-01 DOI: 10.1017/s0373463322000388

引用次数: 0

NAV volume 75 issue 3 Cover and Front matter NAV第75卷第3期封面和封面

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2022-05-01 DOI: 10.1017/s0373463322000376

引用次数: 0

Effect of perception difference between first- and third-person perspectives on local and global situation recognition in ship handling 船舶操作中第一和第三人称视角感知差异对局部和全局态势识别的影响

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2022-05-01 DOI: 10.1017/S0373463322000224

Yuki Kato, Tomoya Horiguchi

引用次数: 1