STK

代码说明：

说明：  STK是由美国Analytical Graphics公司开发的一款在航天领域处于领先地位的商业分析软件。STK支持航天任务的全过程，包括设计、测试、发射、运行和任务应用(STK is a leading commercial analysis software developed by Analytical Graphics Inc. in the aerospace field. STK supports the whole process of space mission, including design, test, launch, operation and mission application.)