SmallSat swarm gravimetry:Revealing the interior structure of asteroids and comets  

作　　者：William Gordon Ledbetter Rohan Sood James Keane Jeffrey Stuart 

机构地区：[1]Astrodynamics and Space Research Laboratory,The University of Alabama,Tuscaloosa,AL 35487,USA [2]Jet Propulsion Laboratory,California Institute of Technology,Pasadena,CA 91109,USA

出　　处：《Astrodynamics》2021年第3期217-236,共20页航天动力学（英文）

基　　金：National Aeronautics and Space Ad-ministration(No.80NM0018D0004).

摘　　要：A growing interest in small body exploration has motivated research into the rapid char-acterization of near-Earth objects to meet economic or scientific objectives.Specifically,knowledge of the internal density structure can aid with target selection and enables an understanding of prehistoric planetary formation to be developed.To this end,multi-layer extensions to the polyhedral gravity model are suggested,and an inversion technique is implemented to present their effectiveness.On-orbit gravity gradiometry is simulated and employed in stochastic and deterministic algorithms,with results that imply robustness in both cases.

关 键 词：GRAVIMETRY asteroid exploration ASTRODYNAMICS stochastic optimization 

分 类 号：P185[天文地球—天文学]