A Universe Light House — Candidate Architectures of the Libration Point Satellite Navigation System

2014 ◽  
Vol 67 (5) ◽  
pp. 737-752 ◽  
Author(s):  
Lei Zhang ◽  
Bo Xu
Keyword(s):  
Navigation System ◽  
Orbit Determination ◽  
Libration Point ◽  
Satellite Navigation ◽  
Navigation Systems ◽  
Satellite Navigation System ◽  
Libration Point Orbits ◽  
Satellite Constellation ◽  
The Earth ◽  
Autonomous Orbit Determination

In view of the shortcomings of existing satellite navigation systems in deep-space performance, candidate architectures which utilise libration point orbits in the Earth-Moon system are proposed to create an autonomous satellite navigation system for lunar missions. Three candidate constellations are systematically studied in order to achieve continuous global coverage for lunar orbits: the Earth-Moon L1,2 two-satellite constellation, the Earth-Moon L2,4,5 three-satellite constellation and the Earth-Moon L1,2,4,5 four-satellite constellation. After a thorough search for possible configurations, the latter two constellations are found to be the simplest feasible architectures for lunar navigation. Finally, an autonomous orbit determination simulation is performed to verify the autonomy of the system and two optimal configurations are obtained in a comprehensive consideration of coverage and autonomous orbit determination performance.

Ground Controlled Auto Piloting

2014 ◽  
Vol 592-594 ◽  
pp. 2155-2159
Author(s):  
S. Srivatsan ◽  
P. Pavithran ◽  
R. Prajit ◽  
V. Sathwik
Keyword(s):  
Navigation System ◽  
Satellite Navigation ◽  
Electric Motors ◽  
Full System ◽  
Knock Out ◽  
Satellite Navigation System ◽  
Wireless Control ◽  
The Earth

This paper deals with the new idea of implementing the auto piloting system that can be controlled from the ground. The ground controlled auto piloting system consists of microcontrollers that connect electric motors with various flying parts of the aero plane. The motors rotate as power is supplied from the programmed microcontroller.The working of the full system is made possible with the help of satellite navigation system, where wireless control on the flight from ground is not interrupted on any part of the earth. The objective of this method is that flights that suffer from a sudden knock out of pilot or a hijack can be managed from the ground by the authorized personnel in the ground (airport).

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.

Aspects of the Soviet Union' s Glonass Satellite Navigation System

1988 ◽  
Vol 41 (02) ◽  
pp. 186-198 ◽  
Author(s):  
P. Daly
Keyword(s):  
Soviet Union ◽  
Navigation System ◽  
Space Shuttle ◽  
Satellite Navigation ◽  
The United States ◽  
Navigation Systems ◽  
Message Content ◽  
Satellite Navigation System ◽  
The Soviet Union ◽  
The Us

Global satellite navigation systems have been under development by the United States and the Soviet Union for many years. The US Navstar GPS system saw its first launch in 1978 and the USSR's Glonass system followed 4 years later. The US space shuttle, which was foreseen as the launch vehicle for Navstar spacecraft, received an enormous setback in 1986 as a result of the Challenger accident. In the meantime, Glonass launches, which carry three spacecraft at once into orbit, have proceeded without incident (until the failure on 24 April 1987). Both systems are currently still in test phase and can be expected to reach operational status in 3 or 4 years' time. In the meantime, the idea of combining Navstar and Glonass into a single civil programme has many attractions for all concerned. Some aspects of Glonass orbital characteristics and signal structure are discussed with this end in view. In addition, features of the data message content of Navstar and Glonass are also compared, to gain a better understanding of the feasibility of a dual satellite navigation system.

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 Navigation Performance of the Libration Point Satellite Navigation System for Future Mars Exploration

2015 ◽  
Vol 69 (1) ◽  
pp. 41-56 ◽  
Author(s):  
Lei Zhang ◽  
Bo Xu
Keyword(s):  
Navigation System ◽  
Unscented Kalman Filter ◽  
Libration Point ◽  
Satellite Navigation ◽  
Reference Scenario ◽  
Satellite Constellations ◽  
Mars Exploration ◽  
Satellite Navigation System ◽  
System A ◽  
Exploration Mission

Based on the candidate architectures of the libration point satellite navigation system, a Mars navigation performance analysis is conducted in this paper to further verify the feasibility of the Universe Lighthouse. Firstly, a high-fidelity Mars exploration mission is developed as the reference scenario. Then, with the use of a novel adaptive unscented Kalman filter, navigation performance of the candidate Earth-MoonL1,2,4,5four-satellite constellations is evaluated by Monte-Carlo simulations. The final results indicate that the libration point satellite navigation system is available for Mars navigation and the effects of different constellation configurations and measurement types are also compared and analysed.

Simplified Constellation Architecture for the Libration Point Satellite Navigation System

2016 ◽  
Vol 69 (5) ◽  
pp. 1082-1096
Author(s):  
Lei Zhang ◽  
Bo Xu
Keyword(s):  
Polynomial Interpolation ◽  
Libration Point ◽  
Satellite Constellations ◽  
Satellite Navigation System ◽  
Libration Point Orbits ◽  
Fitting Procedure ◽  
The Earth ◽  
Navigation Simulation ◽  
Global Coverage ◽  
The Universe

In this paper, a simplified constellation architecture consisting of only two navigation satellites located around the Earth-Moon L1,2 libration points is obtained for the Universe Lighthouse. In order to determine the feasible constellations that can achieve continuous global coverage for lunar orbits, an exhaustive search over all possible combinations of libration point orbits is performed first. With the use of a fitting procedure, amplitude relations between the feasible L1 and L2 libration point orbits are derived by polynomial interpolation. After that, a cislunar navigation simulation is conducted to verify the navigation performance of the candidate two-satellite constellations. The final Monte Carlo simulation results indicate that the simplified system is available for cislunar navigation and the best accuracy of a few tens of metres can be achieved for both the trans-lunar cruise phase and lunar orbit phase.

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.

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