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Relevant bibliographies by topics / Equatorial coordinate system

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Academic literature on the topic 'Equatorial coordinate system'

Author: Grafiati

Published: 7 June 2025

Last updated: 16 July 2025

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Journal articles on the topic "Equatorial coordinate system"

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Templeton, G. H., G. B. Seibert, M. Ramanathan, S. S. Cassidy, and R. Johnson. "Left ventricular coordinate systems." American Journal of Physiology-Heart and Circulatory Physiology 257, no. 3 (1989): H1025—H1031. http://dx.doi.org/10.1152/ajpheart.1989.257.3.h1025.

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Three-dimensional kinematics of radiopaque markers in anterior, posterior, septal, and lateral regions of a major equatorial plane were evaluated in anesthetized dogs by biplane fluoroscopy. Stationary coordinate systems measured marker locations recorded during diastole and systole from a contractile origin at the center of contraction at end systole and from a geometric origin at the intersection with the equatorial plane of the ventricular long axis at end diastole. A time-indexed system measured marker locations at end diastole and at end systole, respectively, from the locations of the ge

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Mirzakandova, S.Kh., N.T. Namozova, and G.I. Sayfullaeva. "METHODOLOGY TEACHING TOPIC ON ASTRONOMY STAR ATLASES." Journal of Academic Research and Trends in Educational Sciences 1, no. 2 (2022): 14–17. https://doi.org/10.5281/zenodo.5837961.

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In the equatorial system, the coordinates of the stars are not associated with the daily motion of the celestial sphere and change very slowly, since they are far enough from us. Therefore, it is this coordinate system that is used to compile star globes, maps and catalogs.

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Peruansky, S. S. "On the Definition of an “Inertial Coordinate System”." Symposium - International Astronomical Union 141 (1990): 95. http://dx.doi.org/10.1017/s007418090008640x.

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Astrometry is a branch of science which develops methods for the quantitative descriptions of places and time instants of astronomical events on the basis of observations of celestial bodies. For this purpose a theoretical coordinate system is introduced (e.g. equatorial a, α, δ). The aim of astrometry is to apply this system to the observed reference objects (stars, planets etc.) so that their coordinates α(t), δ(t) can be calculated according to the relations α(t) =f1(Pk, t-to) and δ(t) =f2(Pk, t-to) where Pk are parameters, to is the conventional time instant and t is the current time. In o

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Zhen, Yan, Wu Zuyu, Zhu Ninghui, Yuan Ligen, and Chen jing Yu. "MATLAB modelling of double sided photovoltaic cell module." Power Electronics and Drives 6, no. 1 (2021): 12–25. http://dx.doi.org/10.2478/pead-2021-0002.

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Abstract In this paper, the equatorial coordinate system is taken as the celestial coordinates, the double-sided photovoltaic module irradiance model is established by using the MATLAB simulation software, and the double-sided photovoltaic module irradiance model is combined with the photovoltaic module model (Jianhui (2001)) to form the mathematical model of the real-time generation system of double-sided photovoltaic modules. The effectiveness of the simulation model was verified by building an experimental platform, and the output characteristics of the optimal line spacing between the doub

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Golovashchenko, V. A., and S. V. Kolomiyets. "METEOR OBSERVATIONAL DATA VISUALISATION IN THE EQUATORIAL COORDINATE SYSTEM USING INFORMATION TECHNOLOGY." Odessa Astronomical Publications 30 (November 17, 2017): 166–69. http://dx.doi.org/10.18524/1810-4215.2017.30.115454.

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Yan, H. J., and E. Groten. "Departure Point, Earth's Rate of Rotation and Coordinate Transformation in Quasi-Inertial Geocentric Equatorial Coordinate System (QIGECS)." Symposium - International Astronomical Union 156 (1993): 363–69. http://dx.doi.org/10.1017/s0074180900173516.

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The paper summarizes the discussion on the origin of right-ascension and puts forward new arguments in view of high-precision Geodesy and Astrometry. From the movement of the Celestial Departure Point, the classical right-ascension precession might be amended by an additional term −0s.000257/century originating from the nutation-precession interaction movement. A similar term might also be introduced in the maintenance of a terrestrial reference system, while the concept of a Terrestrial Departure Point is considered. The definition of the Earth's rate of rotation in an inertial or quasi-inert

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Guseva, Irina S., Alexandr Ju Kogan, and Vladimir N. Heifets. "Ecliptical Coordinate System as the Basis of Regatta–Astro Space Astrometry Program." International Astronomical Union Colloquium 127 (1991): 276–79. http://dx.doi.org/10.1017/s0252921100063983.

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One of the most important problems of modern astrometry is constructing of an ideal inertial coordinate system. A bulk of up–to–date star catalogues is referenced to an equatorial frame, which is far from being really inertial, Some attempts were made to remove this defect by excluding both nutation and precession in right ascention [Guinet 1979, Murray, 1990]. This proposal seams to be a compromise between the existing tradition and the new requirements met by the modern astrometry.

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Zakarevičius, Algimantas, Vladislovas Česlovas Aksamitauskas, Algimantas Jakučionis, and Arminas Stanionis. "DETERMINATION OF GEOGRAPHIC POSITION OF OBJECT BY APPLYING 3D POLAR OBSERVATIONS." Aviation 14, no. 2 (2010): 43–48. http://dx.doi.org/10.3846/aviation.2010.07.

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The geographic position of an object is determined by geodetic latitude, geodetic longitude, geodetic and normal height, and height of the object above the surface of the earth. To determine the geographic position of an object, a technologic scheme is recommended: by applying 3D polar observations, the 3D Cartesian coordinates of the object in the local horizontal coordinate system (for example, with an airport runway tied system) are determined; local horizontal 3D Cartesian coordinates are recomputed into the system of geocentric equatorial 3D Cartesian coordinates; the geodetic coordinates

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Fujimoto, M., and E. Grafarend. "Spacetime coordinates in the geocentric reference frame." Symposium - International Astronomical Union 114 (1986): 269–76. http://dx.doi.org/10.1017/s0074180900148284.

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A geocentric relativistic reference frame is established which is close to the conventional non-relativistic equatorial frame of reference. Within post-Newtonian approximation the worldline of the geocentre is used to connect points by spacelike geodesics on the equal proper time hypersurface and to establish a properly chosen tetrad reference frame. Points on the earth surface and near the earth-space are coordinated making use of the Frobenius matrix of integrating factors which connects the geocentric orthonormal tetrad with the tangent spacetime of relativistic pseudo-Riemann geometry. The

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Gorshkov, A. V., and E. Yu Prosviryakov. "Stagnation points of an inhomogeneous solution describing convective Ekman flow in the oceanic equatorial zone." Diagnostics, Resource and Mechanics of materials and structures, no. 1 (February 2022): 52–66. http://dx.doi.org/10.17804/2410-9908.2022.1.052-066.

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An inhomogeneous analytical solution describing a stratified large-scale isothermal Ekman–Poiseuille flow of a viscous incompressible fluid in the equatorial zone is obtained. A set of stagnation points of this solution is studied. Temperature is set at the flow boundaries. Tangential stresses simulating the effect of wind are specified at the free boundary. The Navier slip conditions are specified on the solid surface. The solution is constructed in the form of functions, linear in horizontal coordinates, with the coefficients dependent on the vertical coordinate. The coefficients of the line

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Book chapters on the topic "Equatorial coordinate system"

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Yan, H. J., and E. Groten. "Departure Point, Earth’s Rate of Rotation and Coordinate Transformation in Quasi-Inertial Geocentric Equatorial Coordinate System (QIGECS)." In Developments in Astrometry and Their Impact on Astrophysics and Geodynamics. Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-1711-1_67.

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Mugnier, Clifford J. "Republic of Equatorial Guinea." In Coordinate Systems of the World. CRC Press, 2023. http://dx.doi.org/10.1201/9781003307785-61.

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Van Brummelen, Glen. "Exploring the Sphere." In Heavenly Mathematics. Princeton University Press, 2017. http://dx.doi.org/10.23943/princeton/9780691175997.003.0002.

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This chapter introduces the reader to the celestial sphere, or the Earth's surface. By rotating the sphere, the motions of the heavens can be simulated. There are three features of celestial motion that came to be associated with Aristotle: all objects move in circles; they travel at constant speeds on those circles; the Earth is at the center of the celestial sphere. The chapter shows how the movements of stars and planets on the sphere's surface can be determined by setting up a system of equatorial coordinates. It also explains how the celestial sphere can be set in motion through the day, and how Hipparchus of Rhodes endeavored to determine the eccentricity of the Sun's orbit. Finally, it discusses spherical geometry, with emphasis on finding bounds on the sides and angles of a spherical triangle.

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Conference papers on the topic "Equatorial coordinate system"

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Kulesh, M. V., and A. F. Seleznev. "Accounting the influence of the projection effect on the selection of cluster stars by proper motions." In 51-st All-Russian with international participation student scientific conference "Physics of Space". Ural University Press, 2024. http://dx.doi.org/10.15826/b978-5-7996-3848-1.54.

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We present a method to calculate the radial velocity and proper motions in equatorial system for a point with given equatorial coordinates and parallax according to the position and velocity of the cluster centroid, under the assumption of a constant spatial velocity of each point. The method makes it possible to calculate the ranges of proper motions for areas with large angular size. Examples of application of the algorithm for the Hyades and Pleiades are given.

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