摘要
讨论在“双星快速定位通信系统”中利用一颗静止通信卫星,在地面站位置已知的条件下,进行单向定时的原理和方法。该方法着重考虑了卫星位置的计算,并应用电离层、对流层时延修正模型,分析卫星位置误差、电离层、对流层传播时延误差,以及设备零值误差等因素对定时精度的影响。应用该方法在北京“双星”演示试验中取得了单向定时准确度好于100ns,精度好于20ns的结果。
This paper described in detail an one-way timing method via one geostationary satellite when the position of the ground stations were exactely known. The effects of troposphere and ionosphere on radio signal were taken into account and a correction of time delay caused by these effects was made by using a time delay model.Furthemore, this paper laid specific stress on discussing the effect of satellite shift on the timing accuracy and proved that by the use of Square-Interpolate method one can lower the timing error and improve the timing accuracy.In the experiment of demonstration conducted in Beijing, the accuracy of one-way timing method has been better than 0 1 us.
出处
《陕西天文台台刊》
CSCD
1990年第1期37-43,共7页
Publications of The Shaanxi Astronomical Observatiory
