Acta Geodaetica et Cartographica Sinica ›› 2016, Vol. 45 ›› Issue (5): 560-565.doi: 10.11947/j.AGCS.2016.20140575

Previous Articles     Next Articles

Series Expansion for Direct and Inverse Solutions of Meridian in Terms of Different Latitude Variables

GUO Jiachun1,2,3, LI Houpu4, ZHUANG Yunling1, LI Dajun2, WU Yanlan3   

  1. 1. School of Science, Anhui Agricultural University, Hefei 230036, China;
    2. Jiangxi Province Key Lab for Digital Land, East China Institute of Technology, Nanchang 330013, China;
    3. School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China;
    4. Department of Navigation, Naval University of Engineering, Wuhan 430033, ChinaAbstract
  • Received:2014-11-05 Revised:2015-05-15 Online:2016-05-20 Published:2016-05-30
  • Supported by:
    The National Natural Science Foundation of China (Nos. 41504031;41571441);Foundation of Jiangxi Province Key Lab for Digital Land (No. DLLJ201507)

Abstract: Formulas for direct solutions of meridian written by the reduced and geocentric latitudes respectively were derived by series expansion. Meanwhile, according to Lagrange inversion theorem, formulas for inverse solutions of the issue were also expressed in terms of the same latitudes. These two formulas were structurally consistent with that expressed by geodetic latitude ones. In these sets of formulas, internal connection between meridian and three different types of latitude were realized. Analysis and numerical calculation showed that the direct and inverse meridional solution with reduced latitude was of higher precision than that with geodetic latitude, and furthermore, there had a unified theory between meridian theory and classical geodetic problems expressed by reduced latitude.

Key words: meridian arc length, series expansion, geodetic latitude, reduced latitude, geocentric latitude

CLC Number: