摘要
提出了一种快速的卫星过顶预报方法,该方法采用MSGP对卫星轨道递推,相对于高精度的轨道递推方法,在精度上不仅可以满足预报的要求,而且速度比较快。在卫星俯仰角和方位角的计算模型中,针对岁差、章动和极移的影响相对于卫星位置是二阶小量,因此在坐标系转换过程中忽略岁差、章动和极移的影响。还进一步论述了两种不同方式的轨道递推方法之间的结果差异,并就轨道递推精度对预报时间和卫星俯仰角、方位角的影响进行了讨论。最后,我们根据对比STK软件的仿真结果,验证该方法是有效的。
The paper presents a better method of forecasting satellites which will past across the ground station. It uses MSGP to simulate satellite orbit, and it is faster than the method of satellite orbit simulation with high precision. At the same time, it fulfils the precision of forecast. In the modal of computing elevation angle and azimuth angle of satellite, we ignore the impact of precession, nutation and pole shift in the process of coordinate system transformation due to their small effects. Besides, it also shows the diversity of two different orbit simulation methods, and discusses the effect made by the diversity to the timetable and angle parameters. At last, we confirm it effective according to the result of STK software.
出处
《海洋测绘》
2006年第3期13-16,共4页
Hydrographic Surveying and Charting
关键词
卫星预报
MSGP
地面站
俯仰角
方位角
satellite forecast
MSGP
ground station
elevation angle
azimuth angle
