gravimetric observation meaning in English

重力测定
重力观测

( 2 ) by comparing the resolution results of fcn parameters obtained by the stacking method from gravity tides with those from vlbi , we can find that tfcn values coming from gravity tides were close to tfcn value from vlbi , but q values given by gravimetric observation were very different from that by vlbi
( 2 )以往利用潮汐观测资料求取fcn常数的迭积法( stackingmothed )的解算结果与vlbi的观测比较， t _ ( fcn )接近，而q则相关较远了。