GMPath - A Path Language for Navigation, Information Query and Modification of Data Graphs

2010 ◽  
Keyword(s):  
Navigation Information

scholarly journals An INS/Geomagnetic Integrated Navigation Algorithm Based on Matching Strategy and Hierarchical Filtering

Electronics ◽  
2019 ◽  
Vol 8 (4) ◽  
pp. 460
Author(s):  
Xiusheng Duan ◽  
Jing Xiao ◽  
Xiaohui Qi ◽  
Yifei Liu
Keyword(s):  
Magnetic Measurements ◽  
Inertial Navigation ◽  
State Equation ◽  
Integrated Navigation ◽  
Matching Algorithm ◽  
Filtering Algorithm ◽  
Navigation Algorithm ◽  
Physical Experiments ◽  
Matching Strategy ◽  
Navigation Information

To improve the positioning accuracy of an inertial/geomagnetic integrated navigation algorithm, a combined navigation method based on matching strategy and hierarchical filtering is proposed. First, the PDA-ICCP geomagnetic matching algorithm is improved. On basis of evaluating the distribution of magnetic measurements, a number of controllable magnetic values are regenerated to participate in the geomagnetic matching algorithm (GMA). As a result, accuracy of the matching algorithm is ensured and its efficiency is improved. Secondly, the integrated navigation filter is designed based on the hierarchical filtering strategy, in which the navigation information of the geomagnetic matching module and inertial navigation module are respectively filtered and fused in the main filter. In this way, the shortcoming that GMA is unable to provide continuous and real-time navigation information is overcome. Meanwhile, precision of the inertial/geomagnetic integrated navigation algorithm is improved. Finally, the feasibility and validity of the proposed algorithm are verified by simulation and physical experiments. Compared with the integrated filtering algorithm which directly uses the error equation of inertial navigation system (INS) as the state equation, the proposed hierarchical filtering algorithm can achieve higher positioning precision.

scholarly journals Quantitative analysis of a camera operation for endoscopic sinus surgery using a navigation information

2016 ◽  
Vol 17 (4) ◽  
pp. 333-342
Author(s):  
Takaaki Sugino ◽  
Akihito Kuboki ◽  
Tsuguhisa Nakayama ◽  
Kazuhiro Ohmura ◽  
Daiya Asaka ◽  
...  
Keyword(s):  
Quantitative Analysis ◽  
Endoscopic Sinus Surgery ◽  
Sinus Surgery ◽  
Navigation Information

scholarly journals Validation of BeiDou Observations

2014 ◽  
Vol 8 (2) ◽  
Author(s):  
Ahmed El-Mowafy ◽  
Congwei Hu
Keyword(s):  
Single Point ◽  
Real Data ◽  
Empirical Method ◽  
Observation Model ◽  
Triple Frequency ◽  
Local Modeling ◽  
Detection And Identification ◽  
Using Data ◽  
Navigation Information ◽  
Graphical Diagnostics

AbstractThis study presents validation of BeiDou measurements in un-differenced standalone mode and experimental results of its application for real data. A reparameterized form of the unknowns in a geometry-free observation model was used. Observations from each satellite are independently screened using a local modeling approach. Main advantages include that there is no need for computation of inter-system biases and no satellite navigation information are needed. Validation of the triple-frequency BeiDou data was performed in static and kinematic modes, the former at two continuously operating reference stations in Australia using data that span two consecutive days and the later in a walking mode for three hours. The use of the validation method parameters for numerical and graphical diagnostics of the multi-frequency BeiDou observations are discussed. The precision of the system’s observations was estimated using an empirical method that utilizes the characteristics of the validation statistics. The capability of the proposed method is demonstrated in detection and identification of artificial errors inserted in the static BeiDou data and when implemented in a single point positioning processing of the kinematic test.

An Examination of Pilot-Reported Trust and Response to Information Conflicts Experienced on the Flight Deck

2021 ◽  
Vol 11 (2) ◽  
pp. 79-87
Author(s):  
Meredith Carroll ◽  
Paige Sanchez ◽  
Donna Wilt
Keyword(s):  
Information Sources ◽  
General Aviation ◽  
Online Questionnaire ◽  
Weather Information ◽  
Conflicting Information ◽  
Aviation Pilots ◽  
Flight Deck ◽  
Navigation Information

Abstract. The purpose of this study was to examine how pilots respond to conflicting information on the flight deck. In this study, 108 airline, corporate, and general aviation pilots completed an online questionnaire reporting weather, traffic, and navigation information conflicts experienced on the flight deck, including which information sources they trusted and acted on. Results indicated that weather information conflicts are most commonly experienced, and typically between a certified source in the panel and an uncertified electronic flight bag application. Most participants (a) trusted certified systems due to their accuracy, reliability, recency, and knowledge about the source, and (2) acted on the certified system due to trust, being trained and required to use it, and its indicating a more hazardous situation.

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