Consideration of GPS Navigation Message Used by Next-Generation SBAS

DOI
  • KITAMURA Mitsunori
    National Institute of Maritime, Port and Aviation Technology, Electronic Navigation Research Institute
  • ASO Takahiro
    National Institute of Maritime, Port and Aviation Technology, Electronic Navigation Research Institute
  • SAKAI Takeyasu
    National Institute of Maritime, Port and Aviation Technology, Electronic Navigation Research Institute
  • HOSHINOO Kazuaki
    National Institute of Maritime, Port and Aviation Technology, Electronic Navigation Research Institute

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Other Title
  • 次世代SBASで利用するGPS航法メッセージの検討

Description

The SBAS is one of GPS augmentation systems improving accuracy and integrity for aviation use. Recently the next-generation SBAS (NG-SBAS) using multi-frequency signals has been discussed and it is necessary to clarify which navigation message is suitable for NG-SBAS, legacy message on GPS L1 (LNAV) or new one on L5 signal (CNAV). The authors evaluated the performance of these messages and found no significant difference in accuracy with consideration of the error correction made by the SBAS. Additionally, employing CNAV makes it costful to use the GPS-L5Q precision signal. As a result, we conclude LNAV is better choice for NG-SBAS.

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