Lunisolar Perturbations of High-Eccentricity Orbits Such as the Magnetospheric Multiscale Mission

Williams, Trevor ; Palmer, Eric ; Hollister, Jacob ; Godine, Dominic ; Ottenstein, Neil ; Burns, Rich

关键词: ANGULAR MOMENTUM;    APOGEES;    DATA ACQUISITION;    EARTH MAGNETOSPHERE;    ECCENTRIC ORBITS;    ELLIPTICAL ORBITS;    LOW EARTH ORBITS;    MAGNETIC FIELD RECONNECTION;    MOON;    PERIGEES;    PERTURBATION;    RADII;    SPACECRAFT MANEUVERS;    SUN;   

RP-ID  :  AAS 19-914,GSFC-E-DAA-TN72049

学科分类：空间科学

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来源: NASA Technical Reports Server

【 摘 要 】

For highly eccentric orbits such as that of the Magnetospheric Multiscale (MMS)mission, with apogee radius now 29.34 Earth radii, the third-body effects of Sun andMoon are the major perturbations. One key consequence is an oscillation in MMSperigee altitude, on an approximately 6 year cycle. This variation has already requiredperigee-raise maneuvers to avoid an untimely reentry. There is also a long-termevolution in the orientation of the MMS orbit, with period roughly twice as long. Thiseffect may potentially be useful for MMS science studies, as it can bring the spacecraftinto new regions of the magnetosphere.