首页|Model on picometer-level light gravitational delay in the GRACE Follow-On-like missions
Model on picometer-level light gravitational delay in the GRACE Follow-On-like missions
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Model on picometer-level light gravitational delay in the GRACE Follow-On-like missions
Laser interferometry plays a crucial role in laser ranging for high-precision space missions such as GRACE(Gravity Recovery and Climate Experiment)Follow-On-like missions and gravitational wave detectors.For such accuracy of modem space missions,a precise relativistic model of light propagation is required.With the post-Newtonian approximation,we utilize the Synge world function method to study the light propagation in the Earth's gravitational field,deriving the gravitational delays up to order c-4.Then,we investigate the influences of gravitational delays in three inter-satellite laser ranging techniques,including one-way ranging,dual one-way ranging,and transponder-based ranging.By combining the parameters of Kepler orbit,the gravitational delays are expanded up to the order of e2(e is the orbital eccentricity).Finally,considering the GRACE Follow-On-like missions,we estimate the gravitational delays to the level of picometer.The results demonstrate some high-order gravitational and coupling effects,such as c-4-order gravitational delays and coupling of Shapiro and beat frequency,which may be non-negligible for higher precision laser ranging in the future.
classical general relativitypost-Newtonian approximationphase shifting interferometry
董金壮、黄玮圣、秦成刚、谈玉杰、邵成刚
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MOE Key Laboratory of Fundamental Physical Quantities Measurement & Hubei Key Laboratory of Gravitation and Quantum Physics,PGMF and School of Physics,Huazhong University of Science and Technology,Wuhan 430074,China
classical general relativity post-Newtonian approximation phase shifting interferometry
万方数据
维普
