Journal ArticleDOI
Long-term orbit computations with KS uniformly regular canonical elements with oblateness
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In this paper, a fixed step-size fourth-order Runge-Kutta-Gill method is employed for numerical integration of the canonical equations with Earth's oblateness.Abstract:
This paper concerns with the study of KS uniformly regular canonical elements with Earth's oblateness. These elements, ten in number, are all constant in the unperturbed motion and even in the perturbed motion, the substitution is straightforward and elementary due to the transformation laws being explicit and closed expression. By utilizing the recursion formulas of Legendre's polynomials, we are able to include any number of Earth's zonal harmonics J
n in the package and also economize the computations. A fixed step-size fourth-order Runge-Kutta-Gill method is employed for numerical integration of the canonical equations. Utilizing 5 test cases covering a large range of semimajor axis and eccentricity, we have carried out computations to study the effects of Earth's zonal harmonics (up to J
36) and integration step-size variation. Bilinear relations and energy equation are used for checking the accuracies of numerical integration. From the application point of view, the package is utilized to study the behaviour of 900 km height near-circular sun-synchronous satellite orbit over a longer duration of 220 days time (nearly 3078 revolutions) and the necessity of including more number of Earth's zonal harmonic terms is noticed. The package is also used to study the effect of higher zonal harmonics on three 900 km height near-circular orbits with inclinations of 60, 63.2, and 65 degrees, by including Earth's zonal harmonics up to J
24. The mean eccentricity (e
m) is found to have long-periods of 459.6, 6925.1 and 1077.6 days, respectively. Sharp changes in the variation of Ωm near the minima to em are noticed. The values of Ω
m are found to be very near to +-90 degrees at the extrema of em. The same orbit is employed to study the effect of variation of inclination from 0 to 180 degrees on long-period (T) of eccentricity with J
2 to J
24 terms. T is found to increase rapidly as we proceed towards the critical inclinations.read more
Citations
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Journal ArticleDOI
Effects of radiation pressure and earth’s oblatness on high altitude artificial satellite orbit
TL;DR: In this article, the effects of radiation pressure together with tesseral and zonal harmonics on the high altitude artificial satellites orbits were studied using the fourth order of Runge Kutta method.
Journal ArticleDOI
Analytical theory in terms of J2, J3, J4 with eccentric anomaly for short-term orbit predictions using uniformly regular KS canonical elements
TL;DR: In this paper, a non-singular analytical theory with respect to the Earth's zonal harmonic terms J2, J3, J4 has been developed for short-periodic motion, by analytically integrating the uniformly regular KS canonical equations of motion using generalized eccentric anomaly "E" as the independent variable.
Journal ArticleDOI
Prediction of satellite orbits contraction due to diurnally varying oblate atmosphere and altitude-dependent scale height using KS canonical elements
TL;DR: In this paper, a non-singular analytical theory for the motion of near-Earth satellite orbits with the air drag effect is developed in terms of uniformly regular KS canonical elements.
Journal ArticleDOI
Study of the Earth's oblateness and rotating atmosphere effects upon an artificial satellite in terms of KS-regular variables.
TL;DR: In this paper, an approach for the prediction of an orbit with the KS-regular variables was proposed, where perturbations due to the gravitational oblateness of the Earth and the rotating atmosphere were considered.
Analytical Orbit Predictions with Air Drag using K-S Uniformly Regular Canonical Elements
M. Xavier James Raj,R.K. Sharma +1 more
TL;DR: In this paper, a nonsingular analytical theory for the motion of near Earth satellite orbits with the air drag effect is developed for long term motion in terms of the KS uniformly regular canonical elements by a series expansion method, by assuming the atmosphere to be symmetrically spherical with constant density scale height.
References
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Journal ArticleDOI
Perturbation theory of Kepler motion based on spinor regularization.
E. Stiefel,P. Kustaanheimo +1 more
TL;DR: In this article, Kustaanheimo et al. developed a regularization of Kepler motion using a simple mapping of a four-dimensional space R* onto a 3D space Ä, where the equations of any undisturbed Kepler motion are linear differential equations.
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Prediction of satellite motions in the Earth's gravitational field with axial symmetry by the KS regularized theory
TL;DR: In this paper, economical and stable recurrence formulae for the Earth's zonal potential and its gradient for the KS regularized theory were established for any number of n of the zonal harmonic coefficients.
Journal ArticleDOI
Motion of an artificial earth satellite in an orbit of small eccentricity
TL;DR: In this article, the first order perturbations of the elements of near-circular earth satellite orbits are calculated to an accuracy of the order of and including the first power of eccentricity.