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陈万通,汪竹青. 一种基于二次型约束最小二乘法的瞬时单点定位算法[J]. 科学技术与工程, 2021, 21(19): 8247-8252.
Chen Wantong,Wang Zhuqing.An Instantaneous Single Point Positioning Algorithm Based on Least Squares with Quadratic Constraints[J].Science Technology and Engineering,2021,21(19):8247-8252.
一种基于二次型约束最小二乘法的瞬时单点定位算法
An Instantaneous Single Point Positioning Algorithm Based on Least Squares with Quadratic Constraints
投稿时间:2020-12-04  修订日期:2021-04-19
DOI:
中文关键词:  全球导航卫星系统(GNSS)  标准单点定位(SPP)  二次型等式约束最小二乘  高度约束
英文关键词:Global Navigation Satellite System (GNSS)  Standard Single-point Positioning (SPP)  least squares with quadratic equality constraints  altitude constraint
基金项目:中国民航大学民航航班广域监视与安全管控技术重点实验室开放基金
     
作者单位
陈万通 中国民航大学
汪竹青 中国民航大学
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中文摘要:
      在某些具有鲁棒性要求的应用中,标准单点定位(SPP)仍然发挥着至关重要的作用。但是经典SPP的定位精度仍然为米级,不足以满足一些实际应用的需求,例如水文测量和机场场面活动的车辆等。针对该问题,本文通过将先验高度信息融入到SPP算法中来实现瞬时亚米级定位精度,提出了一种基于二次型等式约束最小二乘估计的SPP定位方法。利用实测的GPS卫星观测数据进行SPP实验,实验结果表明,与无约束SPP相比,本方法有效地改善了定位精度,并且不依赖于载波相位测量,有较高的鲁棒性。
英文摘要:
      Standard single-point positioning (SPP) still plays an essential role for some applications with high-level requirements for navigation robustness. However, the accuracy of SPP is usually meter level and may not be sufficient for dynamic applications such as hydrology and vehicle surface activities in the airport. In order to solve this problem, an instantaneous sub-meter level navigation solution can be achieved by incorporating a priori altitude information into SPP. In this paper, an altitude constrained SPP algorithm is proposed, by applying the least squares method with quadratic equality constraints. The real GPS data was used for algorithm validation. The results demonstrate that the altitude constrained SPP’s positioning accuracy is improved effectively compared to the conventional SPP method and it is robust due to not depending on the carrier phase measurements.
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