학술논문
Experimental testing of relativistic effects, variability of the gravitational constant and topography of Mercury surface from radar observations 1964–1989
Document Type
Article
Author
Source
Celestial Mechanics and Dynamical Astronomy; April 1993, Vol. 55 Issue: 4 p313-321, 9p
Subject
Language
ISSN
09232958; 15729478
Abstract
The new analysis of radar observations of inner planets for the time span 1964–1989 is described. The residuals show that Mercury topography is an important source of systematic errors which have not been taken into account up to now. The longitudinal and latitudinal variations of heights of Mercury surface were found and an approximate map of equatorial zone |ϕ|≤120° was constructed. Including three values characterizing global nonsphericity of Mercury surface into the set of parameters under determination allowed to improve essentially all estimates. In particular, the variability of the gravitational constantG was evaluated: