摘要
机载环境下的GPS误差特性与静态不同,文中给出了一套机载环境下的GPS测量误差分析和建模的方法。先通过多项式拟合,分离出机载GPS的测量误差,并根据GPS的具体应用环境,用机载SAR(Synthetic Aperture Radar)雷达成像验证了这种分离误差方法的有效性,然后对GPS误差进行最小二乘处理,建立GPS的AR误差模型。应用这种方法,分析了实测某型飞机平稳飞行情况下的GPS数据,结果表明该型飞机在平稳飞行情况下的GPS速度和定位误差过程分别可以用两个不同的10阶AR过程表示。
The characteristics of GPS error under the circumstances of fast motion are different from that of static circumstances. A method is presented which is used to analyze the GPS error in this paper, At first, the GPS measurement error is separated by polynomial fitting, and the method separating GPS error is validated by SAR image, and then the model of GPS error is erected by signal processing. Some airborne GPS data are analyzed using the method presented here, and the result shows that the GPS velocity and position error model are two different stochastic processes of 10th AR （autoregressive） model in our condition.
出处
《中国惯性技术学报》
EI
CSCD
2006年第4期30-34,共5页
Journal of Chinese Inertial Technology
