Performance assessment of single- and dual-frequency BeiDou/GPS single-epoch kinematic positioning
Performance assessment of single- and dual-frequency BeiDou/GPS single-epoch kinematic positioning
复制标题
DOI：
10.1007/s10291-013-0339-3
复制
发表时间：
2014-07-01
期刊：
影响因子：
4.9
通讯作者：
Wang, Aibing
中科院分区：
文献类型：
--
作者：
He, Haibo;Li, Jinlong;Wang, Aibing
给出了基于双频实际北斗/GPS数据的短基线单历元运动学定位的初步结果。对北斗/GPS单历元定位系统在静态和运动两种模式下的性能进行了验证，并与GPS单历元定位系统进行了比较。结果表明，单频北斗/GPS和双频北斗单历元运动定位的可用性和可靠性与双频GPS相当。单频和双频北斗/GPS模糊度分辨率的固定率和可靠性明显提高，特别是在高截止海拔情况下。对于固定模糊的定位精度，在两次8公里的短基线测试中，北斗/GPS单历元方案相对于仅GPS方案分别提高了23%和4%。这些结果表明，双频北斗实时运动学（RTK）已经适用于亚太地区，单频北斗/GPS实时运动学（RTK）也可以实现，但只需要几秒的初始化。更有希望的是，在具有挑战性的条件下，双频北斗/GPS RTK可以克服仅GPS RTK的困难，当然，假设额外的北斗卫星是可见的。
The first results of the short baseline single-epoch kinematic positioning based on dual-frequency real BeiDou/GPS data are presented. The performance of the BeiDou/GPS single-epoch positioning is demonstrated in both static and kinematic modes and compared with corresponding GPS-only performance. It is shown that the availability and reliability of the single-frequency BeiDou/GPS and dual-frequency BeiDou single-epoch kinematic positioning are comparable to those of the dual-frequency GPS. The fixed rate and reliability of ambiguity resolution for the single- and dual-frequency BeiDou/GPS are remarkably improved as compared to that of GPS-only, especially in case of high cutoff elevations. For positioning accuracy with fixed ambiguities, the BeiDou/GPS single-epoch solutions are improved by 23 and 4 % relative to the GPS-only case for two short baseline tests of 8 km, respectively. These results reveal that dual-frequency BeiDou real-time kinematic (RTK) is already applicable in Asia-Pacific areas and that single-frequency BeiDou/GPS RTK is also achievable but only with initialization of several seconds. More promisingly, the dual-frequency BeiDou/GPS RTK can overcome the difficulties with GPS-only RTK under the challenging conditions assuming, of course, that the additional BeiDou satellites are visible.