论文标题
重量卫星的质量敏感性
Mass sensitivity of gravimetric satellites
论文作者
论文摘要
对于阶段仪和地球表面上点源的卫星到卫星跟踪测量值的频域表达式。计算测量设备中噪声的最大信噪比与噪声的函数，并从中推断出最小可检测点的质量。当Goce样梯度直接在质量上传递时，M_3 = 100 GT的点质量质量为100 gt的质量为3。在卫星到卫星的跟踪任务宽限期m_3 = 1.3 GT =微波仪器，M_3 = 0.5 GT，用于激光范围的干涉仪。探索了具有不同轨道参数的未来宽限期任务的灵敏度和提高的加速度计敏感性，并发现了检测类似点的源的最佳航天器分离。通过将M_3降低到500 km轨道轨道高度，并优化900 km的卫星分离，可以显示出提高加速度计测量加速度计的灵敏度的未来误差。
Frequency-domain expressions are found for gradiometer and satellite-to-satellite tracking measurements of a point source on the surface of the Earth. The maximum signal-to-noise ratio as a function of noise in the measurement apparatus is computed, and from that the minimum detectable point mass is inferred. A point mass of magnitude M_3=100 Gt gives a signal-to-noise ratio of 3 when a GOCE-like gradiometer passes directly over the mass. On the satellite-to-satellite tracking mission GRACE-FO M_3=1.3 Gt for the microwave instrument and M_3=0.5 Gt for the laser ranging interferometer. The sensitivity of future GRACE-like missions with different orbital parameters and improved accelerometer sensitivity is explored, and the optimum spacecraft separation for detecting point-like sources is found. The future-mission benefit of improving the accelerometer sensitivity for measurement of non-gravitational disturbances is shown by the resulting reduction of M_3 to as small as 7 Mt for 500 km orbital altitude and optimized satellite separation of 900 km.
