Evaluation of DFMC SBAS Broadcasted from Japanese QZSS in the Arctic

Toru Takahashi, Mitsunori Kitamura, Susumu Saito, Amane Fujiwara, and Takeyasu Sakai

Peer Reviewed

Abstract: The current Satellite-Based Augmentation System (SBAS) based on the GPS L1 signals broadcasts augmentation messages from geostationary (GEO) satellites, which is not available practically in the polar region at a latitude of 72 degrees or higher. The Japanese Quasi-Zenith Satellite System (QZSS) also provides the augmentation message for GPS, Galileo, and QZSS based on the ground observation. The inclination of QZSS is about 42 degrees so that there is a possibility to receive the augmentation message in the Arctic. The Electronic Navigation Research Institute (ENRI) has developed a prototype DFMC SBAS ground system, which is used as a draft standard based on the Standards and Recommended Practices (SARPs). We conducted an evaluation of the performance of DFMC SBAS broadcasted from QZSS in Oslo, Norway (10.72 deg. E, 59.94 deg. N) from 24 February 2021 to 17 March 2021. The positioning errors did not exceed the protection level, and the availability was 84.8% during this time interval. In this study, we concluded that the augmentation message could be used in the Arctic region, and suggested that the availability will be improved if three or more monitor stations are newly installed in the European region (Takahashi et al., 2022). As a next step of the evaluation, we installed the observation system on the oceanographic research vessel Mirai. This observation aims to evaluate the DFMC SBAS in wide area of the Arctic, and the receiving condition of the ship such as the multi-path effect cause by the hull as well as the sea surface.
Published in: Proceedings of the ION 2024 Pacific PNT Meeting
April 15 - 18, 2024
Hilton Waikiki Beach
Honolulu, Hawaii
Pages: 75 - 80
Cite this article: Takahashi, Toru, Kitamura, Mitsunori, Saito, Susumu, Fujiwara, Amane, Sakai, Takeyasu, "Evaluation of DFMC SBAS Broadcasted from Japanese QZSS in the Arctic," Proceedings of the ION 2024 Pacific PNT Meeting, Honolulu, Hawaii, April 2024, pp. 75-80. https://doi.org/10.33012/2024.19618
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