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In moving-base gravity gradiometry, accelerometer mounting errors andmismatch cause a rotating accelerometer gravity gradiometer (RAGG) tobesusceptible to its own motion. In this study, we comprehensively consideraccelerometer mounting errors, circuit gain mismatch, accelerometer linearscale factors imbalances, accelerometer second-order error coefficients andconstruct three RAGG models, namely a numerical model, an analytical model, anda simplified analytical model. The analytical model and the simplifiedanalytical model are used to interpret the error propagation mechanism anddevelop error compensation techniques. A multifrequency gravitational gradientsimulation experiment and a dynamic simulation experiment are designed toverify the correctness of the three RAGG models; three turbulence simulationexperiments are designed to evaluate the noise floor of the analytical modelsat different intensity of air turbulence. The mean of air turbulence is in therange of 70 to 230 mg, the noise density of the analytical model is about 0.13Eo/sqrtHz, and that of the simplified analytical model is in the range of 0.25to 1.24 Eo/sqrtHz. The noise density of the analytical models is far less than7 Eo/sqrtHz, which suggests that using the error compensation techniques basedon the analytical models, the turbulence threshold of survey flying may bewidened from current 100 mg to 200 mg.

Mathematic Model And Error Analysis of Moving-base Rotating Accelerometer Gravity Gradiometer