scholarly journals Development and Application of Big Data in the Field of Satellite Navigation

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Jianjun Zhang ◽  
Jing Li
Keyword(s):  
Big Data ◽  
Fog Computing ◽  
Satellite Navigation ◽  
Data System ◽  
Spatiotemporal Data ◽  
Navigation Systems ◽  
Satellite Navigation System ◽  
Incremental Development ◽  
System Data ◽  
Satellite Navigation Systems

Based on the characteristics of big data, the meaning of fog computing, and the spatiotemporal data characteristics of satellite navigation systems, the concept, connotation, and characteristics of Beidou big data were put forward. The Beidou big data processing process was sorted out, the preliminary architecture of the Beidou big data system with fog computing function was built, and finally the fog computing based Beidou big data system was proposed. Big data research content provides technical support for further tapping the value of Beidou satellite navigation system data and realizing the incremental development of satellite navigation systems.

scholarly journals Using satellite navigation for seeding of wide-row and narrow-row crops  

2011 ◽  
Vol 57 (Special Issue) ◽  
pp. S7-S13
Author(s):  
M. Macák ◽  
M. Žitňák ◽  
L. Nozdrovický
Keyword(s):  
Crop Production ◽  
Spring Barley ◽  
Satellite Navigation ◽  
Navigation Systems ◽  
Row Crops ◽  
Satellite Navigation System ◽  
Row Crop ◽  
Narrow Row ◽  
Correct Application ◽  
Satellite Navigation Systems

The present paper is aimed at the use of satellite navigation of field machinery during seeding, this operation belonging to the most important field practises. Our attention was focused on the determination of the accuracy of the satellite navigation system based on using the correction signal real-time kinematic and its correct application for planting a wide-row crop (sunflower) and seeding a narrow-row crop (spring barley). The aim of the field experiment was also to specify the level of the necessary accuracy of satellite navigation systems during planting and seeding. The length of seeding/planting equipment was confronted with the accuracy of navigation of individual passes, especially when turning on the headlands. In the conclusion, the importance is highlighted of the automated tractor headland control during satellite navigation of combined field machines in the crop production.

scholarly journals Precise time and frequency transfer combined BeiDou’s RDSS and RNSS signals

2019 ◽  
Vol 2019 (1) ◽  
Author(s):  
Wenxue Liu ◽  
Hong Yuan ◽  
Jian Ge ◽  
Ying Xu
Keyword(s):  
Satellite Orbit ◽  
Satellite Navigation ◽  
Satellite System ◽  
Signal Frequency ◽  
Navigation Systems ◽  
Satellite Navigation System ◽  
Frequency Transfer ◽  
Satellite Navigation Systems ◽  
Satellite Service ◽  
Precise Time

Abstract Unlike other satellite navigation systems such as GPS (Global Positioning System), the BeiDou satellite navigation system broadcasts RDSS (Radio Determination Satellite Service) and RNSS (Radio Navigation Satellite Service) signals simultaneously on its GEO (geostationary earth orbit) satellites and provides related navigation services. This paper studies the method of using the RDSS and RNSS signals of BeiDou to achieve accurate frequency and time transmission. We analyze the generation mechanism of RDSS signal and RNSS signal of BeiDou GEO satellite, establish a mathematical model of RDSS and RNSS signal frequency transfer, and derive an equation based on BeiDou’s RDSS and RNSS signals for accurate frequency and time transmission. We also verified the relevant performance of the method through computer simulation. The results show that the combination of RDSS and RNSS signals from the BeiDou satellite system provides a new solution for its application in precise time and frequency transmission. This method is different from other satellite navigation systems such as GPS and is unique to the BeiDou system, with high accuracy and low dependence on satellite orbit accuracy.

SATELLITE NAVIGATION SYSTEM MARKETING

2017 ◽  
pp. 76-83
Author(s):  
Ірина Борисівна Чичкало-Кондрацька ◽  
Вікторія Вікторівна Добрянська ◽  
Володимир Тарасович Мірошниченко
Keyword(s):  
Navigation System ◽  
Swot Analysis ◽  
Satellite Navigation ◽  
Associate Professor ◽  
Global Market ◽  
Navigation Systems ◽  
Launch Vehicles ◽  
Senior Lecturer ◽  
Satellite Navigation System ◽  
Satellite Navigation Systems

UDC 69.003:658.8  Chychkalo-Kondratska, D.Sc. (Economics),Professor.      V. Dobryanskaya,       PhD       (Technical),Associate Professor. V. Miroshnichenko, Senior Lecturer. Poltava National Technical Yurii Kondratyuk University. Satellite navigation system marketing. Satellite navigation system was developed as a defense project, but in recent decades, has formed a global market of users of satellite navigation systems, and manufacturers of navigational equipment. The article is devoted to analysis of market prospects by the European satellite navigation system Galileo. Conducted SWOT-analysis, allowed to conclude that the project «Galileo» has advantages and problems. The main problem is the complexity of creating a satellite constellation, because Europe does not have its own reliable and cheap launch vehicles. The solution may be the inclusion in the draft of Ukraine, who has processed technology of rocketry.   Keywords: marketing, the global market, investment project, satellite navigation systems, launch vehicles, SWOT-analysis, marketing of the project.

Satellite Positioning Methods

2000 ◽  
Author(s):  
Vidal Ashkenazi ◽  
Chris Hill
Keyword(s):  
Doppler Shift ◽  
First Generation ◽  
Satellite Navigation ◽  
Navigation Systems ◽  
Similar System ◽  
Positioning Systems ◽  
Satellite Navigation System ◽  
Satellite Positioning ◽  
Satellite Navigation Systems ◽  
Processing Techniques

In the previous chapter, positioning was examined from a historical perspective, recognizing that in many parts of the world, such data are not just useful, they are frequently the only data available. But in many areas, the case for extending the limits of the continental shelf will be dependent on the acquisition of new data, and for the most part, this will mean the use of satellite navigation systems. Therefore, this chapter deals in some detail with current and future satellite navigation and positioning systems. The first generation of satellite navigation systems used the principle of the Doppler shift of transmissions from satellites to provide measurements of a user's position. The Doppler shift of an emitted signal is related to the relative velocity between the source of the signal and the point at which it is received. The apparent frequency of the received signal is increased when the emitter is moving toward the receiver, and decreased when it is moving away. This phenomenon can often be observed in everyday situations, such as when a vehicle drives past a pedestrian. The pitch of the sound from the vehicle appears to drop as it passes the pedestrian, due to the transition from increased to decreased frequency of the sound. In satellite Doppler systems, measurements of the Doppler shift of signals from the satellites are combined with knowledge of the satellite's position and velocity (its ephemeris), to give an indication of the receiver's position. TRANSIT was the first operational satellite navigation system (see chapter 7). Data-processing techniques were developed which allowed a receiver to be located with respect to another at a known location, to an accuracy of the order of 1 m. TRANSIT ceased operation as a position and timing system at the end of 1996. A similar system to TRANSIT was developed by the Soviet Navy in 1965. The system, known as TSIKADA, is still operational today (2000). Since satellite Doppler systems rely on the accumulation of measurements over a period of time to provide a useful measure of a receiver's position, they could not be used as true real-time satellite navigation systems (see chapter 7).

scholarly journals Optimization of an aircraft flight trajectory in the GLONASS dynamic accuracy field

2018 ◽  
Vol 21 (5) ◽  
pp. 56-66 ◽  
Author(s):  
O. N. Skrypnik ◽  
N. G. Arefyeva ◽  
R. O. Arefyev
Keyword(s):  
Navigation System ◽  
Orbital Motion ◽  
Satellite Navigation ◽  
Geometric Factor ◽  
Route Optimization ◽  
Navigation Systems ◽  
Satellite Navigation System ◽  
Aircraft Flight ◽  
Dynamic Accuracy ◽  
Satellite Navigation Systems

Advanced technologies in air traffic management assume the transition to flexible routing based on the use of the satellite navigation systems. However, the accuracy of these systems depends on the location of the navigation satellites in relation to the target object and will vary in the available airspace. Therefore, the designed optimal flight path of the aircraft should be built taking into account the accuracy of its keeping in the variable navigation-time field (accuracy field) of the satellite navigation system. The accuracy field of the satellite navigation systems can be characterized by the geometric factor (spatial, horizontal and vertical). The geometric factor of the satellite navigation system is determined by the relative position of the consumer and the satellites upon which the navigation problem is solved, and is a deterministic value. Due to the orbital motion of satellites and the movement of the consumer, the geometric factor will change in space and time. Knowing the laws of the satellites orbital motion it is possible to calculate the geometric factor for any point in the air space and for any moment of time according to the known almanac of the system. This allows predicting the expected accuracy of the navigation and time determination during the flight on a particular air route. Optimization methods based on the algorithms of A-star and Dijkstra graph theory are chosen for aircraft flight trajectories construction. Mathematical modeling is used for the optimal trajectory construction in the GLONASS dynamic accuracy fields with their various structures in static and dynamic problem setting.

scholarly journals The Development of GPS Navigation Systems in Civil Aircraft

2013 ◽  
Vol 390 ◽  
pp. 512-517
Author(s):  
Ahmad Abbas Al-Ameen Salih ◽  
Fawaz Mohammed Jumaah ◽  
Amzari Zhahir ◽  
Chandima Gomes
Keyword(s):  
Federal Aviation Administration ◽  
Satellite Navigation ◽  
Civil Aviation ◽  
Navigation Systems ◽  
Satellite Navigation System ◽  
Aircraft Landing ◽  
Aircraft Navigation ◽  
Automatic Landing ◽  
The World ◽  
Satellite Navigation Systems

The industry of civil aviation is developing in a fast manner to occupy the increasing needs for a fast, safe and comfortable transportation. To achieve these needs, some effective programs, plans, and systems designs are required. The current reliable aircraft navigation and landing systems have relatively a low level of accuracy especially in aircraft landing stage. The best landing category could be achieved requires a runway visual range up to 50 meters and automatic landing system is not in operation yet all over the world. Aircraft navigates using Radar, Radio and Satellite navigation systems. The Federal Aviation Administration (FAA) plans to replace legacy navigation systems with satellite based navigation technology. Currently, the Global Positioning System (GPS) and its augmentations is the main satellite navigation system used all over the world for air navigation applications. The development of aircraft navigation has been performed with the enhancement of GPS augmentation systems. In this paper, aircraft navigation systems and techniques will be presented in this paper to evaluate the integrity and reliability of each system, and to make a comparison among these systems according to accuracy, integrity and availability.

scholarly journals Uma investigação em uma base de dados geoespacial com uso de técnicas de Big Data

2020 ◽  
Author(s):  
Jessica Viana ◽  
César Silva ◽  
Melissa Zanatta ◽  
Bruno César Vani ◽  
Linnyer Ruiz
Keyword(s):  
Big Data ◽  
Large Volume ◽  
Satellite Navigation ◽  
Navigation Systems ◽  
Radio Waves ◽  
Satellite Signal ◽  
Satellite Navigation Systems ◽  
The Moment

In global satellite navigation systems, a large volume of data is produced during the monitoring of radio waves propagated in the ionosphere. This monitoring is based on index calculations from data obtained continuously through receivers. This paper presents an investigation, using Big Data techniques, to explore the data obtained by the receivers, in order to identify the moment when the satellite signal can be obtained with better quality.

scholarly journals Study Of Differential Code GPS/GLONASS Positioning

2014 ◽  
Vol 21 (1) ◽  
pp. 117-132 ◽  
Author(s):  
Paweł Przestrzelski ◽  
Mieczysław Bakuła
Keyword(s):  
Geodetic Network ◽  
Satellite Navigation ◽  
Satellite System ◽  
Reference Station ◽  
Navigation Systems ◽  
Satellite Navigation System ◽  
Positioning Method ◽  
Satellite Navigation Systems ◽  
The Time Domain ◽  
Global Navigation Satellite

AbstractThis paper presents the essential issues and problems associated with GNSS (Global Navigation Satellite System) code differential positioning simultaneously using observations from at least two independent satellite navigation systems. To this end, two satellite navigation systems were selected: GPS (Global Positioning System, USA) and GLONASS (GLObalnaya NAvigatsionnaya Sputnikovaya Sistema, Russia). The major limitations and methods of their elimination are described, as well as the basic advantages and benefits resulting from the application of the DGNSS (Differential GNSS) positioning method. Theoretical considerations were verified with the post-processed observations gathered during a six-hour measurement. The data from selected reference stations of the ASG-EUPOS (Active Geodetic Network — EUPOS) system located at different distances from the rover site was used. The study showed that the DGNSS positioning method achieves higher accuracy and precision, and improves the stability of coordinate determination in the time domain, compared to positioning which uses only one satellite navigation system. However, it was shown that its navigational application requires further studies, especially for long distances from the reference station.

Satellite Navigation Systems for the USSR Merchant Marine

1985 ◽  
Vol 38 (1) ◽  
pp. 118-122 ◽  
Author(s):  
A. Yakushenkov
Keyword(s):  
Navigation System ◽  
World Wide ◽  
Satellite Navigation ◽  
Navigation Systems ◽  
Standard Account ◽  
Satellite Navigation System ◽  
The World ◽  
Merchant Shipping ◽  
Satellite Navigation Systems ◽  
Maritime Community

When the satellite era commenced more than a quarter of a century ago, one could hardly foresee the world wide revolution it heralded in the development of aids to navigation for merchant shipping. However, early investigations into the possible application of satellites to maritime needs led to an understanding of the powerful potential of satellite techniques for navigation. It became clear that if the international maritime community was really interested in a global all-weather, high-precision and commercially viable navigation system; such a system could only be satellite-based. This is evident from the situation that has recently arisen in IMO, where after exhaustive discussion on the mandatory carriage of electronic position-fixing equipment on ships in designated areas, the organization could not express a preference for any particular aid, until it was decided that efforts should be made to develop a global satellite navigation system capable of meeting a new standard of navigational accuracy. Moreover, in preparing the navigational accuracy standard, account was taken of experience gained with existing satellite navigation systems.

The Russian satellite navigation system

1980 ◽  
Vol 294 (1410) ◽  
pp. 307-315 ◽  
Keyword(s):  
Orbital Plane ◽  
Satellite Navigation ◽  
Navigation Systems ◽  
Systematic Analysis ◽  
Satellite Navigation System ◽  
Orbital Parameters ◽  
Rates Of Change ◽  
Global Coverage ◽  
Satellite Navigation Systems ◽  
Current Systems

Since 1972, systematic analysis of Cosmos satellites, having near-circular orbits and periods close to 105 min, has revealed that several groups have had the necessary orbital plane spacing to give the global coverage suitable for satellite navigation systems. Replacements have been launched at regular intervals. The current systems comprise three satellites with 60° spacing, six with 30° spacing and three with 45° spacing. These satellites have been shown to transmit on frequencies close to 150 and 400 MHz. The modulation of the 150 MHz carrier frequencies is explained together with the techniques employed to decode Standard Moscow Time, the satellite’s position in geocentric Cartesian coordinates with corresponding rates of change at 3 min intervals, plus the orbital parameters of all satellites forming the system.

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