Analytical theory in terms of J2, J3, J4 with eccentric anomaly for short-term orbit predictions using uniformly regular KS canonical elements

  • Authors

    • Athira Anand P Department of Aerospace EngineeringKarunya UniversityCoimbatore-641114Tamilnadu, India
    • Ram Krishan Sharma Department of Aerospace Engineering, Karunya Institute of Technology and Sciences, Coimbatore - 641114, Tamil Nadu
    2019-05-05
    https://doi.org/10.14419/ijaa.v7i1.17241
  • Hamilton’s Equations of Motion, Uniformly Regular KS Canonical Elements, Earth’s Oblateness, Short-Term Orbit Predictions, Analytical Integration.

  • A new 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. Only one of the eight equations need to be integrated analytically to generate the state vector, due to the symmetry in the equations of motion, and the computation for the other equations is done by changing the initial conditions. King-Hele’s expression for radial distance ‘r’ with J2 is also considered in generating the solution. The results obtained from the analytical expressions in a single step during half a revolution match quite well with numerically integrated values. Numerical results also indicate that the solution is reasonably accurate for a wide range of orbital elements during half a revolution and is an improvement over Sharon et al. [17] theory, which is generated in terms of KS regular elements. It can be used for studying the short-term relative motion of two or more space objects and in collision avoidance studies of space objects. It can be also useful for onboard computation in the navigation and guidance packages.

     

     

    Author Biography

    • Athira Anand P, Department of Aerospace EngineeringKarunya UniversityCoimbatore-641114Tamilnadu, India
      Professor

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  • How to Cite

    Anand P, A., & Krishan Sharma, R. (2019). Analytical theory in terms of J2, J3, J4 with eccentric anomaly for short-term orbit predictions using uniformly regular KS canonical elements. International Journal of Advanced Astronomy, 7(1), 1-10. https://doi.org/10.14419/ijaa.v7i1.17241