4种全球卫星导航系统实时动态定位效果评估

Evaluation and Comparison of Four Methods for Global Navigation Satellite Systems Real time Kinematic Positioning

摘要:

提出对流层去相关的实时动态定位（RTK）方法,有效降低单历元对流层参数与高程的相关性，实现对流层延迟与高程的有效分离，从而实现毫米级RTK定位.采用上海连续运行参考站（CORS）网的11条长度从23km到90km的基线，比较忽略对流层延迟与估计对流层延迟的单历元最小二乘解、动态卡尔曼滤波与对流层去相关4种RTK方法，重点分析对流层去相关RTK方法分离对流层参数与高程的效果，结果表明，对流层去相关方法在平面与高程方向定位精度均为毫米级，且高程相比平面精度更高.

Abstract:

The troposphere decorrelation method was proposed, which can effectively decrease the correlation of tropospheric parameter and height of single epoch, thus realizing the efficient decouple of height and tropospheric delay and then the millimeter RTK （real time kinematic) results. In this paper, we evaluate the performance of 4 RTK methods by using 11 baselines with baseline lengths from 23 km to 90 km from Shanghai Continuously Operation Reference Station (CORS) network, including the single epoch least squares solutions with and without tropospheric delays, the kinematic Kalman filtering solution and the troposphere decorrelation solution. We highlight the analysis of RTK performance from the troposphere decorrelation method. The numerical experiments indicate that the millimeter accuracies can be obtained for all three coordinate components in the RTK solutions by the troposphere decorrelation method.