摘要
In response to the resolutions of the IUGG-IAG and IAU in 1991, a study of thepossibility of deriving long-term variations of bldnib line from Optical astrometric latitudedata has been carried out. Evidence of the existence of plumb line variations in Europe,ofwhich the periods are about 4 to 6 years, will be sh0wn in the
In response to the resolutions of the IUGG-IAG and IAU in 1991, a study of thepossibility of deriving long-term variations of bldnib line from Optical astrometric latitudedata has been carried out. Evidence of the existence of plumb line variations in Europe,ofwhich the periods are about 4 to 6 years, will be sh0wn in the paper
出处
《中国科学院上海天文台年刊》
1995年第16期41-48,共8页
Annals Shanghai Astronomical Observatory Chinese Academy of Sciences
关键词
纬度变化
天文观测
重力场变化
长期变化
Astronomical observation Latitude determination Deviation of the vertical
