Therefore , to test hj - 1c satellite on - orbit will be valuable for not only satellite data ’ s processing and applications , but also lunching other our country ’ s similar satellites in the future 因此,对hj - 1c小卫星进行在轨测试,不仅是评价卫星在轨性能和卫星数据处理及应用的基础,也可为今后发射的其他sar小卫星提供参考。
The microsatellite characterized with light weight , good performance , short development cycle , low cost and its performance can be enhanced greatly by means of constellation or formation flying 现代微小卫星具有重量轻、性能好、研制周期短、造价低等优点。现代小卫星可通过构成星座或进行编队飞行大大的提高了卫星的性能。
Detailed depict of the influence to the system which cause by path , parameters to the multi - path are provided . discussed the path loss of the system and how to improve the system performance . 2 介绍多飞行器测控系统的信道特征，描述了信道对系统的各种影响和多径信道的各种参数，并讨论了小卫星信道的干扰问题及其解决办法。
It has large ratio of deploying / stowed volume . it may be used as sar antenna for small satellite or as other communication antenna of s or l band . the structural system configuration and key components design are described 它具有展缩比大，重量轻和频段宽等特点，可用于小卫星合成孔径雷达天线和其它s 、 l频段星载通讯天线。
Since the concept of microsatellite was proposed in the 80 ' s 20 centuries , its techniques have made great progress in recent years , the development of which is a significant trend in the aerospace area 从20世纪80年代美国军方提出了现代小卫星的概念以来，现代微小卫星技术发展非常迅速，微小卫星是目前航天器发展的一个重要方向。
Based on the characteristics and performance parameters of hj - 1c small satellite and its sar remote sensor , the novel task , to propose the on - orbit test contents and methods for the sar images , is explored for the first time 本论文的成果在于,根据hj - 1c小卫星及其sar遥感器的特点及性能参数,初步论证了hj - 1c星载s波段sar在轨测试内容和方法。
