日本におけるGPS衛星電波の局所的な電離圏遅延勾配の背景場の評価  [in Japanese] Evaluation of Local Ionospheric Delay Gradients on GPS signals in Japan  [in Japanese]

Access this Article

Search this Article

Author(s)

Abstract

This paper presents evaluations of ionospheric delay spatial gradients with a horizontal scale of several tens kilometers using a TEC (total electron content) data base of Kyoto University based on GEONET (GPS earth observation network) observations. GBAS (ground-based augmentation system) is a system based on the differential GPS technique for aircraft precision approach in the vicinity of an airport with a single frequency of GPS L1-C/A code signal. To support the final phase of precision approach, high reliability is required for a GBAS. However, it is recognized that a large ionospheric gradient could result in significant positioning error. In safety design of a GBAS algorithm to generate messages broadcast to aircraft, it is necessary to distinguish an anomalous ionospheric condition from a nominal. We analyzed ionospheric delay data to evaluate the nominal ionospheric gradient in Japan for the period from 1998 to 2009. We found that the ionospheric gradient to overbound the occurrence probability density function was 8.77mm/km. This result is useful not only to GBAS but also single frequency GPS users.

Journal

  • The Journal of Japan Institute of Navigation

    The Journal of Japan Institute of Navigation 123(0), 135-142, 2010

    Japan Institute of Navigation

References:  14

Codes

  • NII Article ID (NAID)
    110007880676
  • NII NACSIS-CAT ID (NCID)
    AN00188841
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    0388-7405
  • NDL Article ID
    10895758
  • NDL Source Classification
    ZN24(科学技術--運輸工学--船舶)
  • NDL Call No.
    Z16-435
  • Data Source
    CJP  NDL  NII-ELS  J-STAGE 
Page Top