GAST-D Flight Experiment Results with Disturbed and Quiet Ionospheric Conditions

Susumu Saito, Takayuki Yoshihara, Atsushi Kezuka, Shinji Saitoh, and Sonosuke Fukushima, Yuichi Otsuka

Abstract:	GAST-D ground prototype and and GAST-D airborne experimental subsystem have been developed. The GAST-D ground prototype was installed at New Ishigaki Airport located in the low magnetic latitude region. With the ground prototype and the airborne experimental system, GAST-D flight experiments in the low magnetic latitude region under ionospheric quiet and disturbed conditions for the first time in the world. Two flight campaigns were conducted in March and September 2014. In the campaign carried out in September 2014, the vertical error performances were comparable between ionospheric quiet and disturbed condition. However, availability degradation during the severely disturbed condition is an issue. The DSIGMA monitor which is one of the airborne integrity monitors was confirmed by all-sky airglow measurements to react ionospheric disturbance. The next steps of the study include parameter tuning of the ground prototype and airborne experimental system to enhance service availability during ionospheric disturbed conditions.
Published in:	Proceedings of the 28th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2015) September 14 - 18, 2015 Tampa Convention Center Tampa, Florida
Pages:	1494 - 1499
Cite this article:	Saito, Susumu, Yoshihara, Takayuki, Kezuka, Atsushi, Saitoh, Shinji, Fukushima, Sonosuke, Otsuka, Yuichi, "GAST-D Flight Experiment Results with Disturbed and Quiet Ionospheric Conditions," Proceedings of the 28th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2015), Tampa, Florida, September 2015, pp. 1494-1499.
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