由于区域误差的空间相关性随着测站间距离的增加而减弱,所以目前网络RTK系统使用的CORS站间距多在30km~80km,而长距离网络RTK算法可以扩大网络RTK的有效作业距离,降低系统建设和维护成本。本文对长距离网络RTK参考站和流动站的整周模糊度实时解算、流动站用户观测值误差的实时改正等算法进行了研究,并基于本文的算法开发了相关的长距离网络RTK软件,最后利用实测CORS网的数据进行长距离网络RTK算法实验。
The spatial correlation of regional errors decreases along with the range between stations increases.So the range between the CORS of the network RTK is mostly in 30km~80km.While the cost of construction and maintenance for network RTK can be reduced by broadening the operating range with the algorithm of long range network RTK.The real time integer ambiguity resolution for base stations and rover stations for networks in long range RTK and the real time error correction for users in rover stations were discussed in this paper.And the software of long range network RTK was completed then.Finally, the data of CORS networks were processed by the algorithm of network RTK to verify its feasibility.