飞行器轨道的特征点

Characteristic point of vehicle orbit

针对飞行器轨道的数据处理问题，首次提出了轨道的特征点概念。轨道的特征点是飞行器动力突变的真实反映。轨道特征点的客观存在，要求我们在测量数据处理中，在多项式表示轨道[1]时应以特征点为端点，或以特征点为轨道样条表示【'1的当然节点，否则将带来轨道的表示误差，在残差数据中出现波动现象[1]。介绍了提取轨道特征点的方法。仿真与实际测量数据的处理结果表明：特征点提取方法准确度较高（特征点为当然节点的样条函数表示轨道能消除节点选取不当造成的数据波动现象。

We first defines character point in vehicle orbit. u'hich shot'-s change of orbit dynamic. In data processing. the existence of characteristic point requires that we must use them for knots in spline. or for endpoints in polynomial in representing the orbit. otherwise it may lead error in representing orbit. More. discusses a method to get characteristic point. Simulation and actual measured data processing show that our method can improve accuracy of orbit. u'hich can express the phenomenal of data fluctuationl2] in residual data successfully.