Volume 33 Issue 6
Nov.  2013
Turn off MathJax
Article Contents
Zhao Wei, Zhang Chengyi. Practical Analysis and Improvement of Klobuchar Model[J]. Chinese Journal of Space Science, 2013, 33(6): 624-628. doi: 10.11728/cjss2013.06.624
Citation: Zhao Wei, Zhang Chengyi. Practical Analysis and Improvement of Klobuchar Model[J]. Chinese Journal of Space Science, 2013, 33(6): 624-628. doi: 10.11728/cjss2013.06.624

Practical Analysis and Improvement of Klobuchar Model

doi: 10.11728/cjss2013.06.624
  • Received Date: 2012-09-13
  • Rev Recd Date: 2013-09-12
  • Publish Date: 2013-11-15
  • Ionosphere delay error is an unneglectable error source in the propagation of radio signal. The GPS authorized users utilize dual-frequency observations of dual-frequency receivers to determine the ionosphere delay in real time, so the measured results have a high precision. Compared to authorized users, most general users use the ionosphere model to correct the delay error when they utilize single-frequency receivers. Relative to dual-frequency observations, the correction effect by ionosphere model is not ideal. In this paper, dual-frequency observations are used to verify the Klobuchar model which chosen by GPS broadcast ephemeris has a widespread application in single-frequency receivers. Ten days' data of WUHN Observation Station has been picked up to analyze Klobuchar model, and the obtained results were consistent with previous researching results. Also, a new improvement method is proposed based on previous analysis. Since the variability of ionosphere has a close relationship with the Sun's activity intensity, and the sunspot relative number is a symbol reflecting the Sun's activity intensity, the new improvement method is realized by means of sunspot relative number to modify Klobuchar model. This improved method has been proved with a large scale promotion in the correction effect through experimental data. Relative to original model, the correction rate greater than 50% has upgraded from about 60% to 85% above, and that greater than 80% upgraded from 10% to 40% above. In practical application, users of single-frequency receivers can refer to this improvement method to correct Klobuchar model.

     

  • loading
  • [1]
    Jiao Minglian, Jiang Tingchen, Wang Xiuping. Research of development of ionospheric methods based on GNSS[J]. Sci. Surv. Map., 2008(05):91-93. In China (焦明连, 蒋廷臣, 王秀萍. 基于GNSS的电离层模型研究进展[J]. 测绘科学, 2008(05):91-93)
    [2]
    Chang Qingsheng, Tang Siyuan, Chang Qing. GPS surveying: Errors and accuracy control[J]. Bull. Surv. Map., 2000(04):13-15. In Chinese (常庆生, 唐四元, 常青. GPS测量的误 差及精度控制[J]. 测绘通报, 2000(04):13-15)
    [3]
    Zheng Lei, Li Zhenghang, Liu Wanke. Correction of ionospheric delay for real-time orbit determination by using on-board single-frequency GPS data[J]. J. Geod. Geodyn., 2010(03):118-121. In Chinese (郑磊, 李征航, 刘万科. 用星载 单频GPS数据实时定轨的电离层延迟改正[J]. 大地测量与地球动力学, 2010(03):118-121)
    [4]
    Guo Ying, Cheng Pengwei, Lu Hongbiao. Inversing geomagnetic north pole based on GPS signal and Klobuchar model[J]. J. Geod. Geodyn., 2011(03):90-93. In Chinese (郭英, 程鹏飞, 吕洪标. 基于GPS信号和Klobuchar电离层模型反演地磁 北极[J]. 大地测量与地球动力学, 2011(03):90-93)
    [5]
    Smita Dubey, Rashmi Wahi, Gwal A K. Ionospheric effects on GPS positioning[J]. Adv. Space Res., 2006, 38:2478-2484
    [6]
    Klobuchar J A. Ionospheric effects on GPS[J]. GPS World, 1991, 2(4):48-51
    [7]
    Klobuchar J A. Ionospheric time delay algorithm for single frequency GPS Users[J]. IEEE Trans. Aerospace Elec. Syst., 1987, 23(3):325-331
    [8]
    Huang Yidan, Wang Mingyuan, Han Ling. Improve of Klobuchar Model Based on Ionospheric Data of China[C]//Symposium of 19th Space Exploration Committee Meeting. Ningbo: Chinese Society of Space Research, 2006. In Chinese (黄逸丹, 王明远, 韩玲. 基于中国电离层资料对Klobuchar模型 的改进[C]//中国空间科学学会空间探测专业委员会第19次学术交流会. 宁波: 中国空间科学学会, 2006)
    [9]
    Liu Libo, Wan Weixing, Chen Yiding, Yue Huijun. The relationships of ionospheric and solar activity[J]. Chin. Sci. Bull., 2011(07):477-487. In Chinese (刘立波, 万卫星, 陈一定, 乐会军. 电离层与太阳活动性关系[J]. 科学通报, 2011(07):477-487)
    [10]
    Li Zhenghang, Huang Jinsong. GPS Surveying and Data Processing[M]. Wuhan: Wuhan University Press, 2005. In Chinese (李正航. 黄劲松. GPS测量与数据处理[M]. 武汉: 武汉大学出版社, 2005)
    [11]
    Liao Weixun. The interpretation of Klobuchar system[J]. J. Capital Norm. Univ.: Nat. Sci., 2010(01):95-98. In Chinese (廖伟迅. GPS信号电离层时延误差的研究[J]. 首都师范大学学报:自然科学版, 2010(01):95-98)
    [12]
    Liu Jiyu. GPS Satellite Navigation and Positioning Principle and Method[M]. Beijing: Science Press, 2008. In Chinese (刘基余. GPS卫星导航定位原理与方法[M]. 北京: 科学出版社, 2008)
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索

    Article Metrics

    Article Views(1747) PDF Downloads(1636) Cited by()
    Proportional views
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return