基于几何模型的惯性辅助PPP周跳修复与快速重新收敛

付粉娥

doi:10.13442/j.gnss.1008-9268.2017.06.002

基于几何模型的惯性辅助PPP周跳修复与快速重新收敛

doi: 10.13442/j.gnss.1008-9268.2017.06.002

付粉娥

内蒙古自治区地图院,内蒙古呼和浩特 010051

详细信息

作者简介:
付粉娥(1967-),女,高级工程师,主要从事测绘[JP1]地理信息数据处理与方法研究以及质量检验

通讯作者:
付粉娥E-mail: 15598048940@163.com

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- 被引次数: 0
出版历程
- 刊出日期: 2018-02-10

Cycle Slip Correction and Rapid Re-convergences with Inertial Aiding for Precise Point Positioning Based on Geometry-specified Model

FU Fene

Inner Mongolia Institute of Surveying,Mapping and Geoinformation, Hohhot, Inner Mongolia 010051, China

摘要

摘要: 在复杂观测环境下,GNSS信号容易发生周跳和失锁现象,导致精密单点定位技术（PPP）模糊度重新初始化,影响定位精度及可靠性。本文基于PPP／SINS紧组合,提出了利用短时间内惯导递推的高精度位置信息辅助PPP周跳修复的几何模型。该模型采用原始观测值建立历元间差分方程,将周跳作为参数进行估计,而惯导提供的高精度位置作为带权的虚拟观测值参与平差解算,在固定周跳整数值后修复相位观测值,从而保持高精度的连续定位。以车载和机载两组数据分析了该方法的有效性,结果表明,引入惯性辅助能够显著加快PPP定位的重新收敛,实现周跳的准确修复。
- PPP／SINS紧组合 /
- 周跳修复 /
- 非差非组合 /
- 重新收敛
Abstract: The loss of lock and cycle slip on GNSS signals occurs frequently in the GPSdenied environment where re-initialization forprecise point positioning (PPP)is usually required.It results in degrading theaccuracyand reliability of PPP. In this paper, an inertial aiding and geometry-specified cycle repair model is applied in PPP／SINS tightly coupled integration. The proposed model using uncombined observations builds the time-differenced carrier phase equations, which cycle slips are estimated and the displacement from inertial is treated as virtual observation for adjustment. When the cycle slips are fixed to correct integers, the original carrier phases are repaired accordingly to keep continues positioning with high precision. Two tests including vehicle and airborne data are analyzed to validate the proposed method. The results show that inertial aiding could accelerate PPP re-convergences significantly and success to repair cycle slips.
- PPP／SINS tightly coupled integration /
- cycle slip repair /
- zero-differenced and uncombined observations /
- re-convergences

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参考文献(12)

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