Neuromorphic estimation of the parameters of the object’s motion according to the positioning data of GLONASS

2018 ◽  
Vol 931 (1) ◽  
pp. 47-51 ◽  
Author(s):  
A.S. Devyatisilny ◽  
A.V. Shurygin
Keyword(s):  
Radio Signal ◽  
Frequency Error ◽  
Technology Research ◽  
Computing Environment ◽  
Initial Information ◽  
The Earth ◽  
Precise Estimation ◽  
Accuracy Of Measurements ◽  
Trajectory Problem ◽  
Object Relative

The article is devoted to the problem of expanding the capabilities of onboard GLONASS. In GLONASS, the implementation of various methods is possible to determine the parameters of the object’s trajectory. Pseudo-range method is supplemented with well-known error compensation methodologies. In particular, a two-frequency error determination method introduced to compensate errors of radio signal passed through the ionosphere. This makes it possible to solve the problem of precise estimation of object’s location coordinates very effectively. It is actual to consider the location coordinates as the initial information in the construction of onboard navigation algorithms for estimating other parameters of the trajectory, among which the most important is the velocity vector of the object relative to the Earth surface. The article presents a mathematical model of the inverse trajectory problem, the purpose of which is to evaluate object’s location coordinates derivatives, described the used technology, research is carried out and procedures are proposed to improve the solvability of the problem under conditions of finite accuracy of measurements and representation of numbers in a computing environment. To solve the problem, a neural-like algorithm of the Kalman type is proposed. The results of computational experiments are also presented.

scholarly journals The approaches to the economic and geographical analysis of the earth mineral-material resources

2011 ◽  
pp. 175-182
Author(s):  
A. Kal’ko
Keyword(s):  
Economic Evaluation ◽  
Key Words ◽  
Mineral Resources ◽  
Initial Information ◽  
Geographical Analysis ◽  
Material Resources ◽  
The Earth ◽  
Mineral Material ◽  
Geological Information

In the article the conceptual approaches are lighted up in relation to the methods of economic evaluation of raw mineral-material resources of the earth of concrete territories. The ways of account of vagueness of initial information are shown about the present and credible supplies of deposits of minerals, related to the level of the geological information authenticity. Key words: mineral resources, minerals, estimation, rent.

scholarly journals NAO and SHAO participation in the near-Earth space observations

2012 ◽  
Vol 10 (H16) ◽  
pp. 486-487
Author(s):  
A. Shulga ◽  
Y. Kozyryev ◽  
Y. Sybiryakova ◽  
Z. Tang ◽  
Y. Mao ◽  
...  
Keyword(s):  
Space Debris ◽  
Main Task ◽  
Earth Space ◽  
Near Earth Space ◽  
The Earth ◽  
Precise Estimation ◽  
Near Earth Asteroids ◽  
Space Observations

AbstractThe joint observations of space debris are conducted by NAO and SHAO. The main task of observations is precise estimation of the hazard collisions of SD with operating satellites. Observations of the near earth asteroids (NEA) on the distance of less than 0.05 AU, according to the NEODyS program, are conducted in NAO. The main task is to obtain the large number of precise observations of the NEAs during their closest approach to the Earth.

The edge focusing of a radio signal received from outside the earth by an aerial within the ionosphere

1961 ◽  
Vol 263 (1315) ◽  
pp. 552-566 ◽  
Keyword(s):  
Phase Change ◽  
Radio Signal ◽  
Integral Function ◽  
Caustic Surface ◽  
The Earth

For an aerial within the ionosphere, there is a cone of directions within which a radio signal coming in to the earth can reach the aerial. The variation of signal with angle near the edge of this cone is given by an Airy integral function or its derivative, and methods of finding this function are given for an isotropic horizontally stratified ionosphere, both when the earth is assumed to be flat and when its curvature is allowed for. For directions well within the cone, two different rays can reach the receiver, and one of them touches a caustic surface and in consequence suffers a phase change of 90°. For an anisotropic ionosphere, the form of the results would be similar, but further study of the electromagnetic equations within the ionosphere is needed before they can be given in detail.

THE EFFECTIVE ANTENNA BEAM WIDTH FOR A SATELLITE-BORNE RADIO TELESCOPE

1964 ◽  
Vol 42 (11) ◽  
pp. 2146-2152 ◽  
Author(s):  
T. R. Hartz ◽  
R. S. Roger
Keyword(s):  
Radio Telescope ◽  
Radio Signal ◽  
Beam Width ◽  
The Sun ◽  
Sweep Frequency ◽  
Antenna Beam ◽  
The Earth

For an antenna in the ionosphere above the F layer, there is a cone of directions within which a radio signal coming in to the earth can reach the antenna. Computations have been carried out of the aperture of this conical pattern for an antenna height of 1000 km, and for different ionospheric conditions. The computations are compared to experimental determinations of the aperture made using the sweep-frequency receiver in the Alouette satellite to observe the radiations from the sun.

Seepage Analysis and Prevention Technology Research of Wastewater Reservoir in Metal Mine

2012 ◽  
Vol 170-173 ◽  
pp. 439-442
Author(s):  
Jiang Qian Zhao ◽  
Hai Yan Ju ◽  
Jian Hua Li
Keyword(s):  
Fly Ash ◽  
Mine Drainage ◽  
Coal Fly Ash ◽  
Acidic Environment ◽  
Technology Research ◽  
Seepage Analysis ◽  
Technology Program ◽  
Erosion Mechanism ◽  
Metal Mine ◽  
The Earth

Based on the investigation of the seepage causes wastewater reservoir of in one metal mine, the erosion mechanism is analyzed that the acid mine drainage erosion the earth-rock dam, and the technology program of vertical anti-seepage wall is chosen that use concrete with coal fly ash as anti-seepage wall. The practice has proven that such concrete vertical anti-seepage wall can improve the impermeability and structure of concrete, enhancing the anti-seepage wall durability under acidic environment. It can be reference to similar projects.

scholarly journals Editorial

2002 ◽  
Vol 10 (3) ◽  
Author(s):  
Gráinne Conole
Keyword(s):  
Significant Contribution ◽  
Research Work ◽  
Learning Technology ◽  
Technology Research ◽  
Joint Work ◽  
The Earth ◽  
Short Time ◽  
Work Done

This issue of ALT-J is dedicated to Professor David Squires, the previous editor of ALT-J, who died tragically in August 2001. A previous editorial of this journal paid tribute to David's work and provided a review of some of his research interests (Conole, 2001). The seven articles in this issue are from friends and colleagues who worked with David over the years. Some worked with David for only a relatively short time; others are lifelong friends. The authors represent internationally recognized experts in their field and come from all corners of the earth. This in itself is a testament to David's significant contribution to learning technology research. The authors have submitted papers which in some way align with David's own research work or report on joint work done by the authors in partnership with him.DOI:10.1080/0968776020100301 

The motion of a lunar orbiter

1966 ◽  
Vol 25 ◽  
pp. 373
Author(s):  
Y. Kozai
Keyword(s):  
Degrees Of Freedom ◽  
Dimensional Space ◽  
Artificial Satellite ◽  
Equations Of Motion ◽  
Triaxial Ellipsoid ◽  
The Moon ◽  
Secular Motion ◽  
The Earth ◽  
Close Satellite ◽  
The Mean

The motion of an artificial satellite around the Moon is much more complicated than that around the Earth, since the shape of the Moon is a triaxial ellipsoid and the effect of the Earth on the motion is very important even for a very close satellite.The differential equations of motion of the satellite are written in canonical form of three degrees of freedom with time depending Hamiltonian. By eliminating short-periodic terms depending on the mean longitude of the satellite and by assuming that the Earth is moving on the lunar equator, however, the equations are reduced to those of two degrees of freedom with an energy integral.Since the mean motion of the Earth around the Moon is more rapid than the secular motion of the argument of pericentre of the satellite by a factor of one order, the terms depending on the longitude of the Earth can be eliminated, and the degree of freedom is reduced to one.Then the motion can be discussed by drawing equi-energy curves in two-dimensional space. According to these figures satellites with high inclination have large possibilities of falling down to the lunar surface even if the initial eccentricities are very small.The principal properties of the motion are not changed even if plausible values ofJ3andJ4of the Moon are included.This paper has been published in Publ. astr. Soc.Japan15, 301, 1963.

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