Abstract:Abstract: The accelerometer can be used for vibration correction of atomic gravimeters, mitigating vibration noise interference, and enhancing the dynamic measurement accuracy of atomic gravimeters. It constitutes an essential component of the measurement system. To achieve higher device accuracy, it is necessary to calibrate the accelerometer error prior to utilization. In this paper, combined with the dynamic measurement system of the atomic gravimeter, based on the principle of the modulus invariance of the accelerometer gravity vector, the accelerometer is placed on a stable platform for measurement in various orientations, and a cost function is established by comparing the high-precision gravity output of the atomic gravimeter. To address issues related to time-consuming iterative methods and significant reliance on initial values, the cost function is simplified, a linear model is deduced, and the least squares method is employed to compute calibration parameters such as zero bias, scale factor, and non-orthogonal coefficient. Simulation experiments are conducted to investigate the impact of accelerometer noise level, the number of accelerometer orientations, and the initial parameter values on each calibration method. The proposed method's effectiveness and accuracy advantages are preliminarily demonstrated. Subsequent practical assessments are conducted under dock mooring conditions. The results showed that after calibration, the average value of the accelerometer output vector modulus decreased from 1.0035 to 1.0001 , which is closer to the gravity acceleration reference value, and the standard deviation decreased by 70.5%.