期刊
JOURNAL OF GEODESY
卷 95, 期 7, 页码 -出版社
SPRINGER
DOI: 10.1007/s00190-021-01527-3
关键词
Associated Legendre functions; Analytical sums; Infinite series; Green's function
资金
- National Natural Science Foundation of China [NSFC: 41774088, 41974093, 41331066, 41474059]
- Key Research Program of Frontier Sciences CAS (Chinese Academy of Sciences) [QYZDY-SSW-SYS003]
- China Postdoctoral Science Foundation [2020M680649]
- Special Research Assistant Program of the Chinese Academy of Sciences
This study presents a set of analytical equations for an infinite series involving associated low-order Legendre functions, based on the generating function, with nearly sixty equations carefully verified and confirmed for accuracy and effectiveness. The open-source code written in Wolfram language, GNU Octave/MATLAB, and Fortran-90 is available on GitHub.
The associated Legendre functions constituting the kernel function of spherical harmonics have a wide range of applications in geodesic and geophysical fields, such as calculating the Green's functions for a spherical Earth model. The analytical expressions for the infinite series involving the associated Legendre functions are useful. In this paper, starting with the generating function, we present a set of analytical equations for an infinite series involving associated low-order (m = 0, 1, 2) Legendre functions. After careful verification, the accuracy and effectiveness of the nearly sixty listed equations are confirmed. The open-source code written using the Wolfram language, GNU octave/MATLAB, and Fortran-90 are available through GitHub (https://github.com/UCAStanghe2014/analytical_sums_associated_Legendre).
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