scholarly journals Integrated Positioning System With Restricted Access to Navigation Satellite Signals

2017 ◽  
Vol 5 (1) ◽  
pp. 60-66
Author(s):  
Vasyl Kondratiuk ◽  
Eduard Kovalevskiy ◽  
Svitlana Ilnytska
Keyword(s):  
Mathematical Modeling ◽  
Antenna Array ◽  
Phase Difference ◽  
Navigation System ◽  
Cost Effective ◽  
Positioning System ◽  
Navigation Satellite ◽  
Restricted Access ◽  
Satellite Navigation System ◽  
Navigation Signals

Abstract Global satellite navigation system (GNSS) is by far the most cost-effective outdoor positioning technology currently available and used for many types of applications. In some cases a user may face difficult conditions, like restricted access to the navigation satellites due to natural or man-made phenomena. This paper presents an idea of an integrated positioning system capable of functioning under limited visibility conditions of navigation satellites. The system includes a digital antenna array, channels for converting radio navigation signals, a phase difference meter, a gyro platform with 3 gyros, an altimeter and a special calculator. With the help of mathematical modeling, the accuracy characteristics of the system are investigated by determining the coordinates of the carrier under conditions of a small number of available satellite signals.

The Analysis of Positioning Performance and DOP Value Based on BDS/GPS Integrated Navigation Satellite System

2014 ◽  
Vol 654 ◽  
pp. 181-186 ◽  
Author(s):  
Wei Lin Yuan ◽  
Yan Ma ◽  
Hua Bo Sun
Keyword(s):  
Navigation System ◽  
Satellite Navigation ◽  
Satellite System ◽  
Asia Pacific ◽  
Positioning System ◽  
Navigation Satellite ◽  
Integrated Navigation ◽  
Satellite Navigation System ◽  
Integrated Navigation System ◽  
Beidou Navigation Satellite System

The integrated positioning system increases the visible number of single satellite navigation system and improve the DOP value of single satellite navigation system. In accordance with the construction plan, BeiDou Navigation Satellite System (BDS) has started providing continuous passive positioning, navigation and timing service in the most parts of the Asia-Pacific In this paper, DOP value of GPS, BDS and the integrated navigation system are analyzed theoretically. The improvement of DOP value of GPS which resulted from present-running BDS navigation satellites is calculated by GPS/BDS observational data. The conclusions that GPS/BDS integrated navigation system will be able to improve the positioning accuracy and have useful references for the navigation and positioning application are also obtained.

A Study for IGSO Inclination Angles in the Transmitting Satellite Navigation Constellation

2011 ◽  
Vol 64 (S1) ◽  
pp. S73-S82 ◽  
Author(s):  
Lihua Ma ◽  
Guoxiang Ai ◽  
Haifu Ji
Keyword(s):  
Southern Hemisphere ◽  
High Latitude ◽  
Navigation System ◽  
Satellite Navigation ◽  
Geosynchronous Orbit ◽  
High Quality ◽  
Satellite Navigation System ◽  
Inclination Angles ◽  
Navigation Signals ◽  
China Mainland

Unlike a direct broadcasting satellite navigation system, the transmitting satellite navigation system developed in China uses transponders onboard communication satellites to retransmit navigation signals generated at a ground master station. The transmitting navigation satellite constellation consists of a number of inclined geosynchronous orbit (IGSO) satellites. Considering China's mainland coverage in the northern hemisphere occupies some 62 degrees in longitude, the inclination of the IGSO satellites cannot be too high, or its signals would not be received by the users in the middle and high latitude areas when the IGSO satellite travels over the southern hemisphere. Meanwhile, the latitude of the most southerly station in China mainland that can uplink navigation signals is about 18°N when the IGSO satellite travels to the southern hemisphere. Therefore, there is a need to consider the IGSO inclination to achieve balance between uplinking high-quality navigation signals and covering the high-latitude area. In this work, the navigation performance and availability of the IGSO satellite are examined when navigation signals are uplinked from the stations Lintong and Sanya.

Hypothesis Test-based Detection of Wi-Fi Interference on NavIC/IRNSS S-band Signal

2019 ◽  
Vol 72 (04) ◽  
pp. 931-947
Author(s):  
Priyanka L. Lineswala ◽  
Darshna D. Jagiwala ◽  
Shweta N. Shah
Keyword(s):  
Hypothesis Testing ◽  
Navigation System ◽  
Communication Systems ◽  
Hypothesis Test ◽  
Satellite System ◽  
Probability Of Detection ◽  
P Value ◽  
Dual Frequency ◽  
Satellite Navigation System ◽  
Navigation Signals

The Navigation with Indian Constellation (NavIC)/Indian Regional Navigation Satellite System (IRNSS) is an emerging satellite navigation system that provides an independent navigation system for positioning and timing services in India and up to 1,500 km from its borderline. The dual frequency NavIC system uses the L5 frequency and S-band for navigation. These navigation signals are extremely weak and susceptible to interference when they are received on Earth's surface. Moreover, the performance of these bands may be degraded by other band or out-of-band communication systems, which can become the major threat to the performance of a NavIC receiver. The main focus of this paper is to detect real-time interference of Wi-Fi signals in the S-band of the NavIC receiver. The results are prepared with respect to the Power Spectral Density (PSD), execution of acquisition stage and the detection of Wi-Fi interference with two sample hypothesis testing methods including the Kolmogorov-Smirnov (KS)-test, the t-test and the Variance (var)-test. A performance analysis of the p-value is used to measure the evidence of interference existence for hypothesis testing, decision hypothesis and probability of detection are evaluated for each hypothesis method. The results show the severity of the Wi-Fi signal as a potential source of interference for future NavIC applications.

Novel microstrip antenna array for anti-jam satellite navigation system

2015 ◽  
Vol 58 (3) ◽  
pp. 97-106 ◽  
Author(s):  
S. Ye. Martynyuk ◽  
D. O. Vasylenko ◽  
F. F. Dubrovka ◽  
A. G. Laush
Keyword(s):  
Antenna Array ◽  
Navigation System ◽  
Microstrip Antenna ◽  
Satellite Navigation ◽  
Satellite Navigation System ◽  
Microstrip Antenna Array

Marine Navigation with NAVSTAR/Global Positioning System (GPS) Today and in the Future

1982 ◽  
Vol 36 (1) ◽  
pp. 9-28 ◽  
Author(s):  
David E. Wells ◽  
Demitris Delikaraoglou ◽  
Petr Vaníč
Keyword(s):  
Global Positioning System ◽  
Navigation System ◽  
Positioning System ◽  
Eastern Canada ◽  
Satellite Navigation System ◽  
Satellite Constellation ◽  
Global Positioning ◽  
The Future ◽  
Gps System ◽  
Marine Navigation

The principles of operation of the NAVSTAR/GPS system are described within the context of the more familiar shore-based radionavigation systems, and of the Transit satellite navigation system. The present GPS satellite constellation of up to six prototype satellites, and the eventual constellation of up to 18 operational satellites are described. Some details of GPS signal structure, receiver operation, and error models are given. Results of our simulations of 1980 GPS marine navigation performance off eastern Canada are presented. These indicate GPS is presently capable of providing 150 m or better real-time positioning for about 11 hours a day in this region. GPS performance in the future is discussed.

scholarly journals Research on satellite selection algorithm in ship positioning based on both geometry and geometric dilution of precision contribution

2019 ◽  
Vol 16 (1) ◽  
pp. 172988141983024 ◽  
Author(s):  
Pengfei Zhang
Keyword(s):  
Computational Complexity ◽  
Navigation System ◽  
Satellite System ◽  
Navigation Satellite ◽  
Selection Algorithm ◽  
Dilution Of Precision ◽  
Satellite Navigation System ◽  
Satellite Selection ◽  
Geometric Dilution Of Precision ◽  
Global Navigation Satellite

With the networking of four Global Navigation Satellite Systems, the combination of multi-constellation applications has become an inevitable trend, and there will be more and more visible satellites that can be participated in ship positioning. However, the computational complexity increases sharply, which greatly improves the load capacity of the receiver’s data processor and reduces the output frequency of the positioning result. To achieve the balance between positioning accuracy and computational complexity, a new fast satellite selection algorithm based on both of geometry and geometric dilution of precision contribution is proposed. Firstly, this article analyzes the geometry characteristics of the least visible satellites has minimum geometric dilution of precision that meet the positioning requirements and makes clear the layout of their elevation angles and azimuth angles. In addition, it derives the relationship of geometric dilution of precision and the visible satellites layout and gets geometric dilution of precision contribution of each satellite. Finally, based on the observation data of JFNG tracking station of the Multi-Global Navigation Satellite System (GNSS) Experiment trial network, the positioning error and the elapsed time of GPS/Beidou Satellite Navigation System and GPS/Beidou Satellite Navigation System/Russian Global Orbiting Navigation Satellite System (GLOANSS) are compared. Simulation results show that the algorithm solves the problem that there are a lot of matrix multiplications and matrix inversions in the traditional satellite selection algorithm, and the new algorithm can reduce computational complexity and increase receiver processing speed.

Non-military Navigation by Satellites

1997 ◽  
Vol 50 (3) ◽  
pp. 458-463
Author(s):  
Alton B. Moody
Keyword(s):  
Navigation System ◽  
Satellite Navigation ◽  
Navigation Satellite ◽  
Satellite Navigation System ◽  
Satellite Problem ◽  
Near Future ◽  
Alternative Solutions ◽  
Excellent Article

This paper was first published in the Journal in 1963 (Vol. 16, p. 9). It is followed by comments from Brian Kendal.The Transit satellite navigation system, scheduled to become operational in the near future, has been publicized sufficiently for its main features to be rather well known. The excellent article by Dr. R. B. Kershner and Dr. R. R. Newton in the April 1962 issue of this Journal provides a particularly thorough description of the system. In the same issue, Dr. H. C. Freiesleben gives a clear summary of the principal alternative solutions to the navigation satellite problem.

Solving the Grid-to-Ground Problem when Using High Precision GNSS in Archaeological Mapping

2014 ◽  
Vol 2 (2) ◽  
pp. 138-143 ◽  
Author(s):  
William (Fred) Limp ◽  
Adam Barnes
Keyword(s):  
Real Time ◽  
High Precision ◽  
Global Positioning System ◽  
Navigation System ◽  
Survey Methods ◽  
Archaeological Sites ◽  
Positioning System ◽  
Global Satellite Navigation System ◽  
Satellite Navigation System ◽  
Global Positioning

AbstractIncreasingly, high-precision GPS/GNSS (global positioning system/global satellite navigation system) based real-time-kinematic methods are being used in the mapping of archaeological sites. However, when utilizing high-precision satellite-based methods for archaeological location purposes, there is a significant but usually unanticipated problem that must first be addressed if accurate measurements are to be made. Simply put, unless proper correction methods are used, horizontal distances between two locations determined by the GNSS method will differ from the measurements that are made by traditional survey methods. This difference between the two measurements is often referred to as the grid-to-ground problem. This article provides a process to address this problem.

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