A Possible Test of the J2c?2 General Relativistic Orbital Effects with Juno

2nd International Conference on Mathematical Modeling in Physical Sciences 2013

物理学;数学

Iorio, L.^1

Ministero dell'Istruzione, Dell'Università e della Ricerca (MIUR)-Istruzione, Viale Unità di Italia 68, Bari 70125, Italy^1

关键词: Covariance analysis;    Doppler data;    Gravitational fields;    Oblateness;    Orbital effects;    Parameters estimation;    Radio science;    Range-rate measurement;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/490/1/012238/pdf
DOI  :  10.1088/1742-6596/490/1/012238

来源: IOP

【 摘 要 】

For the first time, the 1PN J2c-2effects could be measured by the Juno mission in the gravitational field of Jupiter during its nearly yearlong science phase thanks to the high eccentricity (e 0.947) of the spacecraft's orbit and to the huge oblateness of Jupiter (J21.47 × 10-2). A numerical analysis shows that the expected J2c-2range-rate signal for Juno should be as large as 280 microns per second (μm s-1) during a typical 6 h pass at its closest approach to Jupiter. The radio science apparatus of Juno should reach an accuracy in Doppler range-rate measurements of 1-5 μm s-1over such passes. The range-rate signature of the classical even zonal perturbations is different from the J2c-2one. Thus, further investigations, based on covariance analyses of simulated Doppler data and dedicated parameters estimation, are worth of further consideration.