CORS基准站周跳探测与修复方法研究  

Research on cycle slip detection and repair of CORS stations

作　　者：赵亮 达朝宗[1] 周星 吉长东 徐爱功[2] 

机构地区：[1]甘肃省测绘工程院,兰州730000 [2]辽宁工程技术大学测绘与地理科学学院,辽宁阜新123000

出　　处：《测绘科学》2018年第2期24-29,共6页Science of Surveying and Mapping

摘　　要：在高精度GNSS测量中,周跳的存在直接影响到整周模糊度的解算及最终定位精度。针对目前各省市连续运行基准站网多系统观测数据的获取导致周跳探测工作量增加,该文基于甘肃省卫星定位连续运行基准站网(GSCORS)双频观测值提出了一种满足普遍条件的多系统周跳探测方法。采用相位减伪距结合电离层残差法分别对GPS和BDS原始观测值进行周跳探测与修复,通过对相应载波的模拟周跳探测发现,BDS较大的卫星钟差和伪距噪声影响了数据质量,其周跳检测量时间序列波动大于GPS,对7周以上周跳探测的精度较GPS会有1周的偏差,但电离层残差法能对BDS相位减伪距法探测残留的1周小周跳进行二次探测并修复。实验最终证实该方法能够有效探测并且正确分离GPS和BDS每个频率1周以上的周跳。In high accuracy GNSS surveying,the existence of cycle slip directly affects the ambiguity resolution and the ultimately positioning accuracy.The continuously operating reference stations of each province got multi-system observations,which led to increased workload of cycle slip detection,this paper gave a new method for multi-system cycle slip detection based on Gansu continuously operating reference stations（GSCORS）dual frequency observations,which could meet the general conditions.Using the method of phase reduce pseudorange combining with ionospheric residuals for GPS and BDS cycle slip detection and repair respectively,through the corresponding carrier simulated cycle slips detection found,BDS larger satellite clock error and pseudo noise affecting the quality of the data,the cycle slip detection time series of BDS fluctuated more than the amount of GPS,more than 7 week cycle slip detection accuracy of BDS would have 1 week of deviation than the GPS,but the method of ionospheric residuals was capable of detecting and repairing the BDS cycle slip such as 1 week which remained by using the method of phase reduce pseudorange.Final tests confirmed that this method could effectively detect and correctly separate GPS and BDS each frequency more than 1 week cycle slip.

关 键 词：周跳探测与修复 相位减伪距 电离层残差 周跳检测量 GPS BDS 

分 类 号：P228[天文地球—大地测量学与测量工程]