初轨 meaning in English

preliminary orbit

During simulating the observation of the synchronous debris , choicing two sites : nanjing observatory and kunming observatory , employing two ways that are tracking stars and tracking satellites , and observing the geostation - ary satellites of the identical geographical longitude are in this paper . the method of finding the new object and its initial orbit are given , too
在对于高轨空间碎片进行了观测模拟时，分别选取南京和云南两个观测站；采用两种跟踪方式：跟踪恒星和跟踪卫星；并对于同一地理经度上的同步卫星进行观测；提供了发现新目标的方法；并给出了新目标的初轨多种计算方法。