Local Representation of the Geopotential by Weighted Orthonormal Polynomials Academic Article

abstract

• The finite-element model of the geopotential and its gradient as introduced by Junkins, is significantly improved by the use of orthonormal polynomials. The computational effort to obtain the modeling constants via the normal equations is greatly reduced, especially if the order of approximation is increased. Moreover, replacing an existing gravity representation (such as a spherical harmonic series), can now be more rigorously approached; it is possible (for example) to determine the coefficients of the local approximations by analytical integration. We include several illustrative examples. 1979 by John L. Junkins. The American Institute of Aeronautics and Astronautic.

authors

• Junkins, John

published proceedings

• Journal of Guidance Control and Dynamics

author list (cited authors)

• Engels, R. C., & Junkins, J. L.

citation count

• 20

complete list of authors

• Engels, Remi C||Junkins, John L

publication date

• January 1980

publisher

• American Institute of Aeronautics and Astronautics (AIAA)  Publisher

published in

• Journal of Guidance, Control, and Dynamics  Journal

Digital Object Identifier (DOI)

• 10.2514/3.55947

start page

• 55

end page

• 61

volume

• 3

issue

• 1

URL

• http://dx.doi.org/10.2514/3.55947