Gravity variation distribution in high negative value region is just consistent with the second shear strain's high value region of strain field obtained from GPS observation.
重力负值变化高值区的分布与GPS观测给出的应变场第二剪应变高值区一致。
2
Three methods for gravityfield recovery are mainly studied from the views of observation equation, (1) numerical differential method, (2) energy balance approach, (3) numerical integration method.
Gravity data have the advantage of wide range, high precision and resolution and relative cheap observation cost, so that the gravityfield which contains abundant information has broad applications.