【摘 要】
：
GLONASS adopts FDMA signal mechanism,some inter‐frequency biases generated at the receiver end make difficult to the implementation and application of multi‐m
论文部分内容阅读
GLONASS adopts FDMA signal mechanism,some inter‐frequency biases generated at the receiver end make difficult to the implementation and application of multi‐mode navigation,which is an important subject having to be considered and resolved.First,in this paper,GNSS simulator was implemented based on the study on the testing approach for GLONASS inter‐frequency biases,the experimental data from two kinds of brand receiver (Septentrio PolaRx 4 and Novatel OEMV_3G_L1L2s) was obtained and analyzed in details.The results from receivers show that there is a difference in inter‐frequency bias between the two,whose increasing presents a linear trend.Second,the multi‐station measured data comparison was experimented,influence of GLONASS inter‐ frequency biases on the results from GLONASS independent positioning,GPS/GLONASS integrated positioning and system time offset monitoring are analyzed.The experiment result indicates that correction in GLONASS inter‐frequency bias during location solution and system time offset monitoring can improve the accuracy of positioning and the precision of system time offset monitoring significantly,the performance is related to the type of receiver.
其他文献
一、花粉食品概况花粉是显花植物的雄性配子体,各种植物有其特有形态的花粉粒,最大的约100～200微米,最小的约5～10微米,一般为30～50微米左右。植物花粉含有丰富的蛋白质、氨基酸
本文通过2441名铁路机车乘务员和502名非乘务员的中心视力（远、 中）、双眼立体视觉、明暗适应及色觉功能的研究，明确指出年龄是影响乘务员视觉功能的主要因素，各项视觉功能明显衰退的年龄阈值为35岁～45岁，并对年龄阈值前后两组的正常值进行了探讨，结合乘务员视作业环境和行车事故的调查，提出了我国铁路机车乘务员视觉功能职业体检标准。
As one of the high‐performance receiver,high sensitivity receiver has gradually become a research hotspot in recent years.Increasing the PDI time can improve S
心房颤动（AF）简称房颤，是临床最常见的心律失常之一。临床研究发现AF患者较普通人群更易发生心理问题，其中抑郁较为常见。抑郁不仅增加AF的复发率，还影响着患者生存质量和死亡率。
一、我国出口信贷体系存在的问题虽然在１９９４年我国已成立了专门的出口信贷机构——进出口银行，以政策性金融手段支持产品出口，推动国外经贸事业的发展，但是以目前情况看，中国进出口行
目的评价2013—2019年河南省城市癌症早诊早治项目地区人群结肠镜筛查结果和依从性。方法研究对象来源于河南省“城市癌症早诊早治项目”，于2013年10月至2019年10月，以郑州市、驻马店市、安阳市、洛阳市、南阳市、焦作市、濮阳市和新乡市为研究地区，招募282 377名40~74岁在本地居住3年以上的人群为研究对象。采用患癌风险评估问卷收集基本人口学特征、饮食习惯、生活环境和习惯、心理和情绪、疾
基础部寄生虫教研室刘忠教授等在1986年吉林省敦化市检查东北蝲蛄时,意外地在其蝲蛄的鳃,肝内查得马蹄属吸虫囊蚴,经人工体外培养及感染雏鸭获得成虫,检查当地家鸭也获得成
多年来,通过流行病学调查和动物实验已分别证实吸烟、某些职业接触和肺癌的因果关系,但是吸烟对职业接触诱发肺癌有无效应修饰(交互作用)至今意见不一。有的作者认为吸烟增
With real‐time communication transmission technology development and global GNSS gradually increasing the number of continuous tracking station,No base station
取职业接触者班后尿样5ml,湿法消化后,酸性下加硼氢化钠,用载气将反应生成的砷化氢导入空气乙炔焰上的石英管中原子化,在193.7nm测量其吸收。最低检出浓度0.002mg/L,尿样测定