Corrections to the IAU 1976 precession constant and the coefficients of the IAU 1980 nutation series from VLBI observations  

作　　者：Li Jinling Wang Guangli 

机构地区：[1]Chinese Acad Sci, Shanghai Observ, Joint Radio Astron Res Lab, Shanghai 200030, Peoples R China

出　　处：《Chinese Science Bulletin》1998年第12期1019-1022,共4页

基　　金：theNationalNaturalScienceFoundationofChina (GrantNo .19473110 )

摘　　要：In the aspect of examination by observations and based on a longer data span and improved precision of very_long baseline interferometry observations, the corrections to the IAU 1976 precession constant and the coefficients of IAU 1980 nutation series are solved. The corrections to coefficients of long periodic terms, the detection of the retrograde free core nutation, and the possible relation between the corrections to coefficients of the prograde annual term and the enviromental temperature are also briefly discussed.In the aspect of examination by observations and based on a longer data span and improved precision of very-long baseline interferometry observations, the corrections to the IAU 1976 precession constant and the coefficients of IAU 1980 nutation series are solved. The corrections to coefficients of long periodic terms, the detection of the retrograde free core nutation, and the poesible relation between the corrections to coefficients of the prograde annual term and the enviromental temperature are also briefly discussed.

关 键 词：very long baseline interferometry (VLBI) PRECESSION NUTATION CORRECTIONS to coefficients. 

分 类 号：P12[天文地球—天体测量]