摘要
基于微分法的思想，提出了一种可以直接估计伪距和载波相位观测噪声的方法。通过对二阶系统求三阶导数，隔离系统本身的影响，通过对非差、单差、双差的残余观测噪声序列的分析，直接估计伪距和载波相位的观测噪声和接收机钟差的高阶噪声。由于该方法可以在线工作，对大量的GNSS集成系统，用该方法估计先验观测方差非常方便。
GNSS is a typical two-body problem, which can be treated as a two-order differential system. After three times derivative, the system affect will be removed and the remain high order parts will be noise-like data, which can be used to estimate system noises. Based on differential time serials of observation, a new method to directly estimate the pseudo- range and carrier phase measuring noises is proposed. By composing single differential observation, double differential observation, measuring noise of the receiver and high order clock noise can be separated. Test data show the method is practicable and easy to use. Because it can work on-line, for lots of real-time GNSS integrated system, this method is extremely convenient for prior variance estimating.
出处
《计量学报》
CSCD
北大核心
2013年第3期289-295,共7页
Acta Metrologica Sinica
基金
基金项目：国家自然科学基金（40974008）
科技部ICUK国际合作项目（2009DFA22670）
关键词
计量学
GNSS接收机
二体问题
伪距
载波相位
测量噪声
Metrology
GNSS receiver
Two-body problem
Pseudo-range noise
Carrier phase noise
Measuring noise
