CAJ | 학술논문

导航星表构建是星敏感器设计阶段的重要工作。对于小视场，受限于恒星分布规律，易出现导航星表“空洞”问题。为解决小视场条件下均匀完备导航星表构建问题，对基于球面螺旋基准点的导航星表构建方法进行了改进：摒弃了原方法通过改变球面螺旋基准点数量和位置重新构建导航星表的思路，转而通过增选部分恒星来达到减少星表“空洞”的目的。设立了描述恒星消除星表“空洞”能力的权值，并以该权值递减顺序开展恒星增选；同时，设计了增选恒星距离阈值条件以保持增选后导航星表的均匀性。仿真表明，在4o圆形视场条件下，相对于原方法，文中方法得到的导航星表，总星数减少708颗，均匀性指标提高约44%，而星表“空洞”变化较小，显示了较好的性能。
도항성표구건시성민감기설계계단적중요공작。대우소시장，수한우항성분포규률，역출현도항성표“공동”문제。위해결소시장조건하균균완비도항성표구건문제，대기우구면라선기준점적도항성표구건방법진행료개진：병기료원방법통과개변구면라선기준점수량화위치중신구건도항성표적사로，전이통과증선부분항성래체도감소성표“공동”적목적。설립료묘술항성소제성표“공동”능력적권치，병이해권치체감순서개전항성증선；동시，설계료증선항성거리역치조건이보지증선후도항성표적균균성。방진표명，재4o원형시장조건하，상대우원방법，문중방법득도적도항성표，총성수감소708과，균균성지표제고약44%，이성표“공동”변화교소，현시료교호적성능。
Guide star selection is a crucial part of star tracker design. For thin field-of-view star tracker, guide star catalog "holes" are common as stars are not evenly distributed. To optimize the guide star selection for star tracker with thin field of view, the selection method based on spherical spiral points was modified. Building a new guide star catalog by increasing the number and changing the positions of spherical spiral points, which was usually adopted, was abandoned. Some new stars which can effectively decrease guide star catalog "holes" into the guide star catalog were proposed. The weights to measure stars’ ability of decreasing guide star catalog "holes" were constructed and the adding star process was carried out on the order of the weights descending. And the new star added into guide star catalog was required far away from the guide stars to keep the guide stars even. Simulations expressed that the modified method got less and evener guide stars than the original method with similar guide star catalog"holes", which shows the superiority of the modified method.