多约束条件的全球定位系统单频单历元短基线定向技术与实现

通过研究全球定位系统(GPS)伪距测量精度对GPS载波相位差分技术在短基线定向问题中的影响,提出利用基线长度、基线俯仰、卫星之间几何关系的多约束最小二乘整周模糊度实时搜索算法,给出单频单历元进行短基线定向的具体过程和需要注意的关键问题.算法采用单历元解算,规避载波相位周跳问题,极大地减小初始化时间.静态和动态实验结果均表明:该方法快速有效,解算成功率高,具有较高的定向精度.

Single Frequency and Single Epoch Short Baseline GPS Orientation Determination Method and Realization with Multiple Constraints

Satellite orientation, as one of the main technologies in modern navigation field, has many advantages, such as low cost, quick initialization, high precision and no accumulate error. Based on the discussion of the effect between the accuracy of pseudo-range and carrier phase in the short baseline orientation determination, an improved least squares real-time search algorithm was proposed, which had multi-constraints with fixed baseline length, known pitch angle and geometric relationship among visual satellites. Because of using single epoch information only, the method avoided carrier phase cycle slips, which reduced the initial time significantly. The static and dynamic experimental results proved that this method is speedy and efficient, which is characterized by high success rate and high accuracy in the orientation determination.