Analysis of Ionospheric Spatial Gradient for Satellite Navigation Systems

위성항법시스템 적용을 위한 전리층 지연값 기울기 연구

  • 김정래 (한국항공대학교 항공우주 및 기계공학부) ;
  • 양태형 (한국항공대학교 항공우주 및 기계공학부) ;
  • 이은성 ;
  • 전향식 (한국항공우연구원)
  • Published : 2006.08.01


Ionospheric storms, caused by the interaction between Solar and geomagnetic activities, may degrade the differential GNSS(Global Navigation Satellite Systems) performance significantly, and the importance of the ionospheric storm research is growing for the GBAS(Ground-Based Augmentation System) and SBAS(Satellite-Based Augmentation System) development. In order to support Korean GNSS augmentation system development, a software tool for analyzing the regional ionosphere is being developed and its preliminary results are discussed. After brief description of the ionosphere and ionospheric storm, the research topics on the GBAS applications are discussed. The need for ionospheric spatial gradient analysis is described and some results on the ionospheric spatial gradient during recent storm periods are discussed.


  1. SBAS Ionospheric Working Group, 'Ionospheric research issues for SBAS - A white paper,' ICAD Navigation Systems Panel (NSP) Meeting, Feb. 2003
  2. Datta-Barua, S., T. Walter, J. Blanch, and P. Enge, 'Can WAAS availability be inferred from geomagnetic data? An analysis,' Proceedings of the Ionospheric Effects Symposium 2005, Alexandria, Virginia, May, 2005
  3. Minimum Aviation System Performance Standards for the Local Area Augmentation System. Washington, D.C.: RTCA DO-245, 1998.9.28
  4. M. Luo et. aI., 'LAAS ionosphere spatial gradient threat model and impact of LGF and airborne monitoring,' Institute of Navigation's GPS/GNSS Meeting, Portland, Oregon, Sep. 2003
  5. H. Konno, S. Pullen, M. Luo, and P. Enge, 'Analysis of ionosphere gradient using japan GEONET data,' Institute of Navigation's National Technical Meeting, San Diego CA, Jan. 2005
  6. 한재호, 임상성, 'GPS 정밀도 향상을 위한 전리층 지연 효과에 관한 연구,' 10차 GNSS Workshop, pp. 441-445, Sep. 2003
  7. C. Kee, Y. Sohn, and J. Park, 'Modified tomographic estimation of the ionosphere using fewer coefficients,' Institute of Navigation's GPS/GNSS Meeting, Portland, Oregon, USA, Sep. 2003
  8. M. Hernandez-Paiares et al., 'EGNOS test bed ionospheric corrections under the october and november 2003 Storms,' IEEE transactions on Geoscience and Remote Sensing, vol. 43, no. 10, pp. 2283-2293, Oct. 2005
  9. CODE GIM Web site html