单频GPS精密单点定位难点问题研究

Study on the Method of Precise Point Positioning with Single Frequency

介绍了单频GPS接收机进行精密单点定位的数学模型,着重对单频精密单点定位的两大难点问题周跳探测以及电离层延迟改正进行了研究。以实验的方式,对周跳探测以及电离层延迟改正模型进行验证,分析结果表明,采用本文周跳探测方法能够提高单频数据探测周跳的有效性和准确性;电离层延迟模型的选择对单频PPP的定位精度有着较大的影响,选择精密的电离层延迟模型对提高单频PPP的精度有很大的帮助。

The mathematical model of single -frequency GPS precise point positioning is introduced. And the cycle slips and ionoso- herie delay as the two difficuh problems of single frequency precise point positioning are studied in detail. It is validated for cycle slip and ionospheric delay through an experiment. The results show that the method of cycle slip detection can improve the validity and ac- curacy of the single - frequency date to detect the cycle slip. The choice of ionospheric delay model for single frequency precise point positioning accuracy has a greater impact and it is very important to choose the better ionospheric delay model to improve the accuracy of single -frequency preeise point positioning.