Numerical Simulation of Glide Slope Signal Interferences by Irregular Ground

  • Junichi HondaEmail author
  • Hirohisa Tajima
  • Hisashi Yokoyama
Conference paper
Part of the Advances in Intelligent Systems and Computing book series (AISC, volume 927)


This paper focuses on the performance degradation of glide slope (GS). GS guides pilots regarding their vertical position with respect to an approach path that is formed using ground-reflections. Irregular ground features are known to scatter electromagnetic waves and produce positional errors. Numerical simulations can provide possible solutions for predicting unexpected influences of these scattered electromagnetic waves. We discuss numerical techniques based on the ray-tracing method for two and three dimensional ground models. Propagation paths are estimated from the shortest path along a straight line between a source and a receiver. We discuss how the proposed numerical method works for different ground shapes.



The work was supported in part by a Grant-in-Aid for Young Scientists (B) (16K18072) from Japan Society for Promotion of Science.


  1. 1.
    ICAO (International Civil Aviation Organization): Aeronautical Telecommunications, Annex 10, vol. 1, 6th edn. (2006)Google Scholar
  2. 2.
    Chin, G., Jordan, L., Kahn, D., Morin, S.: Instrument landing system performance prediction. IEEE MTT-S International Microwave Symposium, pp. 346–348, May 1975Google Scholar
  3. 3.
    Redlich, R.W., Gorman, J.T.: Disturbance of ILS localizer signals by reflections from large hangers. IEEE Trans. Aerosp. Electron. Sys. AES-5, 1001–1002 (1969)Google Scholar
  4. 4.
    Shin, S.L.: ILS localizer multipath analysis. IEEE Trans. Aerosp. Electron. Sys. AES-7(1), 54–60 (1971)Google Scholar
  5. 5.
    Thain, A., Estienne, J.-P., Robert, J., Peres, G., Cambon, G., Evain, L., Splitz, B.: A solution for ILS disturbance due to a building. In: Proceedings of the 6th European Conference on Antenna and Propagation (EuCAP), pp. 2392–2395, March 2012Google Scholar
  6. 6.
    Thain, A., Estienne, J.P., Peres, G., Spitz, B., Evain, L., Kumar, M.: Comparisons of different approaches for ILS simulation. In: Proceedings of the 4th European Conference on Antenna and Propagation (EuCAP), Barocelona, Spain, pp. 1–5, April 2010Google Scholar
  7. 7.
    Geise, R., Schueuer, J., Thiele, L., Notte, K., Beckers, T., Enders, A.: A slotted waveguide setup as scaled instrument-landing-system for measuring scattering of an A380 and large objects. In: Proceedings of the Fourth European Conference on Antennas and Propagation (EuCAP 2010), Barcelona, Spain, pp. 227–231, April 2010Google Scholar
  8. 8.
    Greving, G., Biermann, W.D.: Theoretical aspect and numerical solution of scattered from objects under grazing angle incidence - the A380 and the Aircraft Tailfin. In: Proceedings of the 37th European Microwave Conference, Munich, Germany, pp. 1369–1372, October 2007Google Scholar
  9. 9.
    Godfrey, J., et al.: Terrain modeling using the half-plane geometry with applications to ILS glide slope antenna. IEEE Trans. Antennas Propag. 24, 370–378 (1976)CrossRefGoogle Scholar
  10. 10.
    Luebbers, R., Ungvichian, V., Mitchell, L.: GTD terrain reflection model applied to ILS glide scope. IEEE Trans. Aerosp. Electron. Sys. AES-18, 11–20 (1982)Google Scholar
  11. 11.
    Walton, E.K.: Effect of wet snow on the null-reference ILS system. IEEE Trans. Aerosp. Electron. Syst. 29, 1030–1035 (1993)CrossRefGoogle Scholar
  12. 12.
    Honda, J., Otsuyama, T.: An estimation algorithm of scattered powers caused by a moving aircraft. IEICE Commun. Express 2(11), 490–495 (2013)CrossRefGoogle Scholar
  13. 13.
    Honda, J., Otsuyama, T.: Estimation of target detection rate in aircraft surveillance system. In: Proceedings of the 17th International Conference on Network-Based Information Systems (NBiS 2014), Salerno, Italy, pp. 561–565, September 2014Google Scholar
  14. 14.
    Honda, J., Otsuyama, T.: Rapid computation algorithm for radio wave propagation characteristics on airport surface. In: Proceedings of the Eighth International Conference on Complex Intelligent and Software Intensive Systems (CISIS 2014), Birmingham, United Kingdom, pp. 302–306, July 2014Google Scholar
  15. 15.
    Honda, J., Uchida, K., Yoon, K.Y.: Estimation of radio communication distance along random rough surface. IEICE Trans. ELECTRON. E93-C(1), 39–45 (2010)Google Scholar
  16. 16.
    Takematsu, M., Uchida, K., Honda, J.: Method for reduction of field computation time for discrete ray tracing method. IEICE Trans. Electron. E97-C(3), 198–206 (2014)Google Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Junichi Honda
    • 1
    Email author
  • Hirohisa Tajima
    • 1
  • Hisashi Yokoyama
    • 2
  1. 1.Electronic Navigation Research Institute (ENRI)National Institute of Maritime, Port, Aviation TechnologyChofuJapan
  2. 2.Japan Aviation Consultant D&T Co., Ltd. (ACDT)NiizaJapan

Personalised recommendations