平经度与偏心率联合偏置双星共位技术

针对在偏心率隔离情况下,由于共位双星半长轴并不完全相同,导致双星平经度差不断增加的情况,讨论了平经度与偏心率联合偏置情况下的双星共位控制策略.该策略通过计算得到双星允许的最大平经度差,控制双星漂移过程中的平经度差保持在允许的范围,确保在偏心率偏置条件下实现双星的安全隔离.理论和算例表明,双星共位的控制周期与卫星的测控精度有关,随着测控精度的提高,双星共位的控制周期可以等于每颗星的东西位置保持周期.

A Method of Collocating Two Geostationary Satellites with Eccentricity and Mean Longitude Separation

This paper proposes a combined control strategy for collocation of two GEO （Geosynchronous Earth Orbit） satellites with eccentricity and mean longitude separation to compensate for the increase of the mean longitude difference of the two satellites because of unequal semi-major axis in the case of eccentricity separation.The mean longitude difference of the collocated satellites is controlled within the maximum allowed range computed with the proposed method to ensure safety of the collocated satellites with eccentricity separation.Theoretical analysis and numerical examples show that the control period for collocated satellites is related to orbit determination errors and maneuver execution errors.The control period for collocated satellites can be equal to that of station-keeping for each individual satellite with the increase of instrumentation and control accuracy.