Point-mass sensitivity of gravimetric satellites
作者： Robert Spero
DOI: 10.1016/J.ASR.2020.12.019
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摘要: Abstract Frequency-domain expressions are found for gradiometer and satellite-to-satellite tracking measurements of a point source on the surface Earth. The maximum signal-to-noise ratio as function noise in measurement apparatus is computed, from that minimum detectable mass inferred. A magnitude M 3 = 100 Gt gives when GOCE-like passes directly over mass. On mission GRACE-FO 1.3 microwave instrument 0.5 laser ranging interferometer. sensitivity future GRACE-like missions with different orbital parameters improved accelerometer explored, optimum spacecraft separation detecting point-like sources found. future-mission benefit improving non-gravitational disturbances shown by resulting reduction , to small 7 Mt 500 km altitude optimized satellite 900 km.
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