中文摘要：

iGrav超导重力仪是当前世界上最新型的便携式相对重力仪,可提供最稳定和最高精度的连续相对重力测量。利用武汉九峰台站FG5-112绝对重力仪与iGrav-007超导重力仪连续3天的同址观测结果,基于最小二乘线性回归和迭代算法,精密确定iGrav-007的格值。数据处理结果表明,iGrav-007的格值为（-91.6402±0.0852）×10^-8m·s^-2/V,相对标定精度为0.0929%,连续1天的FG5绝对重力观测获得的格值精度优于0.2%,连续3天的FG5绝对重力观测获得的格值精度优于0.1%。

英文摘要：

The iGrav superconducting gravimeter is the newest relative gravity meter with the highest accuracy and most portable measurements in the world.It provides the most stable relative gravity measurement.The calibration factor for the iGrav-007 superconducting gravimeter was accurately determined using site observations obtained with the FG5-112 absolute gravimeter and the iGrav-007 superconducting gravimeter at Wuhan Jiufeng station,based on Least Square method.The data processing results show that the calibration factor was（-91.640 2±0.085 2）×10^-8 m·s^-2·V^-1 with a relative calibration accuracy of 0.092 9%,the accuracy of the calibration factor obtained by the absolute gravimeter for one day was better than 0.2%,the accuracy of the calibration factor obtained by absolute gravimeter for three days was better than 0.1%.