CAJ | 학술논문

针对Walker星座对纬度带目标或者全球目标的持续性覆盖问题，提出一组判定定理，得到一套求解该问题的方法。利用Walker自身的对称性得到需要进行覆盖分析的最小时段；利用卫星星下点轨迹的拓扑关系得到其对地球表面的一个划分，得到需要分析的最小区域；利用覆盖带方法求得对需要分析区域的覆盖的必要条件和充分条件；得到一个关于连续性单重覆盖和N重覆盖的充要条件。数值仿真结果表明，该套方法计算结果精确，计算效率较高。
침대Walker성좌대위도대목표혹자전구목표적지속성복개문제，제출일조판정정리，득도일투구해해문제적방법。이용Walker자신적대칭성득도수요진행복개분석적최소시단；이용위성성하점궤적적탁복관계득도기대지구표면적일개화분，득도수요분석적최소구역；이용복개대방법구득대수요분석구역적복개적필요조건화충분조건；득도일개관우련속성단중복개화N중복개적충요조건。수치방진결과표명，해투방법계산결과정학，계산효솔교고。
To solve the problem of Walker constellation’s continuous coverage on zonal target or global target ,a group of judg-ment theorem was put forward ,and a method for solving the problem was given .Firstly ,the symmetry of Walker constellation was used to get the minimum period of time which need to be analyzed .Then according to the topological relations of the satel-lites sub-traces ,a division of the earth surface was found ,and the minimum area that need to be analyzed was gotten .And then , a necessary condition and a sufficient condition of the minimum area ’s coverage were brought forward .At last ,a necessary and sufficient condition for continuous single coverage and N-level coverage was given .The simulation results show that this method has accurate calculation result and high computational efficiency .