摘要
介绍了局域和广域差分GPS及其增强系统的技术特点，在此基础上讨论了在中国建立广域差分GPS实时定位系统的重要意义，以及有关问题的思考。
The concept and behaviours of the local area and wide area differential GPS,as well as their augmentation systems are briefly introduced. The importance and the necessity for the establishment of wide area DGPS real time positioning system in China are discussed.
出处
《测绘工程》
CSCD
1998年第1期6-10,共5页
Engineering of Surveying and Mapping
