Two kind of horizontal plane trajectories of the AcquisitionPhase (AP), Tangential Trajectory and Arc Trajectory, are discussed and predictors of ground track range are given, respectively.
比较分析了两种捕获段水平面轨迹:切线轨迹和弧线轨迹。分别给出了两种轨迹的数学模型以及航程计算公式。
2
The review is a key milestone in the Air Force acquisition process and is followed by the full system development and demonstration phase.
在空军采办程序中,评审是一个关键性的里程碑,并且是随全系统研发和演示阶段之后进行的。
3
The Space Fence program is a multi-phaseacquisition leading to the delivery of up to three globally positioned S-band radars capable of interoperation with the Space Surveillance Network.