利用旋转基线方法进行双星快速定向

我国双星定位系统载波相位可观测信息少，且对地静止，难以直接利用传统的多星系统(GPS、GLONASS等)解模糊方法进行双星定向。针对此种情况，提出了一种旋转基线确定单差模糊度参数初值的方法，总定向时间不超过50秒，从而可实现双星快速定向。并且通过多位置观测，具备一定的周跳检测能力。进行了仿真实验，结果表明：当基线长度为2米，原始载波相位测量精度为1％周时，定向精度优于偏航角0．045度、俯仰角0．048度。该项技术应用于惯导系统的初始对准，可实现快速寻北，大幅减少其对准时间。此外，与双星无源定位系统结合，可组建一套我国完全自主的无源快速定位定向系统，大大提高了隐蔽性，对于我军的炮兵阵地联测意义重大。进一步，将双星与INS进行组合导航，应用前景广阔，因此该项技术具有较深的研究开发潜力。

Fast orientation determination by Twin-Star system through method of rotating baseline

Without redundant measurements information of the Twin-Star system,it is difficult to perform orientation determination by carrier phase through usual ambiguity resolution methods of GPS or GLONASS.This paper has developed a new method to fulfill the above task quickly.By rotating the baseline the initial single difference cycle ambiguity between the two antennas was resolved,the total operation time less than 50 seconds.Further more,through multiple position observation,the cycle slip occurrence was detected with a certain success probability.Large number of simulation experiments have been made.And the simulating results show that:the accuracy of 0.045 degree,0.048 degree for yaw and pitch respectively can be reached with a 2-meter long baseline while the non-difference carrier phase measurements accuracy of twin-star receiver just to be 1 percent cycle.Applying this technique to initial alignment of INS will decrease the operation time greatly.Besides,combined with the Twin-Star passive positioning technology,it leads to a passive and fast direction and position determination system with complete self-determination of our country.Due to its high safety,such a system is of great significance to the artillery position survey of our army. Further more,hybrid navigation of the Twin-Star system and INS has a wide application prospect,so this technology has much research and development potential.