The gravimetricobservation curves at Chengdu Standard Station showed significantly annual variation period, with air pressure and ground water being main interference factors.
成都基准台的重力观测曲线具明显年变周期，其干扰因素主要为气压和地下水。
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First of all, You have to design the gravimetric network and a base stATion. Gravimeter observATion are usually made AT the corner of the square grid.