2000国家GPS大地网
national GPS geodetic network 2000
5．12大地震
heavy earthquake on May 12
贝塞尔大地主题解算公式
Bessel formula for solution of geodetic problem
标量大地电磁法
scalar magnetotelluric method
超长周期大地电磁
super long period Magnetotelluric
纯量大地电磁法
scalar magnetotelluric method
磁感式大地电导率仪
electromagnetic induction type soil electrical con