A COMPARISON STUDY OF NORMAL GRAVITY FORMALAE IN REGIONAL GRAVITATIONAL SURVEY

This paper briefly describes the definition of the normal gravitational field and the parameters that affect its value,compares the 1980 normal gravity formulae and CGCS2000 normal gravitational field parameters,makes a comparative analysis of the normal gravity and CGCS2000 normal gravitational field parameters used frequently in present gravitational exploration work,and deals with the necessity of popularizing the new normal gravity formulae in regional gravitational survey.A comparison between the normal gravitational field formulae deduced by four parameters of CGCS2000 and previously used normal gravitational field formulae shows that the former formulae are more scientific and advanced and can more accurately reflect real earth gravitational field.