摘要
For global navigation satellite system(GNSS)in the application of high earth orbit(HEO)determination,there are problems such as small number of visible satellites and weak signal magnitude.The transmitting and receiving errors of GNSS signal in the environment of HEO space are analyzed,and related compensating scheme is also proposed.Acquisition of GNSS signal is implemented by using weak signal acquisition technology based on Duffing.Precise tracking of weak GNSS signal is also realized by adopting dynamic detection and compensation technology based on Duffing chaotic oscillator.Simulation results show that,certain acquisition sensitivity and navigation precision can be reached,and the acquisition and tracking of weak GNSS signal can be realized by using the proposed technology,which provides good technology support for autonomous navigation of HEO and large elliptical spacecrafts.
作者
袁德虎
Sun Jun
Han Fei
Chen Yang
Chen Yun
Yuan Dehu;Sun Jun;Han Fei;Chen Yang;Chen Yun(Shanghai Aerospace Control Technology Institute,Shanghai 201109,P.R.China;Shanghai Key Laboratory of Space Intelligent Control Technology,Shanghai 201109,P.R.China)
基金
the National Key Research and Development Program of China(No.2016YFB0501000)
the Major Program of National Natural Science Foundation of China(No.61690214)
the Project of D020214.
