Experiments of Inverted Pseudolite Positioning for Airship-Based GPS Augmentation System

Toshiaki Tsujii, Masatoshi Harigae, Joel Barnes, Jinling Wang and Chris Rizos

Abstract:	Recently some countries have begun conducting feasibility studies and R&D projects on High Altitude Platforms Systems (HAPS). Japan has been investigating the use of an airship system that will function as a stratospheric platform (altitude of about 20km) for applications such as environmental monitoring, communications and broadcasting. In addition, if pseudolites (PL) were mounted on the airships, their GPS-like signals would be stable augmentations that would improve the accuracy, availability, and integrity of GPS-based positioning systems because the airship network would cover all of Japan. The accuracy of the pseudolite positions would be a limiting factor for such a service since the PL 'ephemeris error' is more serious than GPS due to the lower height of the airship. The carrier phase-based inverted-PL method is one of the positioning schemes that could provide the precise 'ephemeris' of the airship. Therefore, a preliminary ground test of the inverted-PL positioning has been conducted in both static and kinematic mode, and a high positioning accuracy in both modes has been demonstrated.
Published in:	Proceedings of the 15th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2002) September 24 - 27, 2002 Oregon Convention Center Portland, OR
Pages:	1689 - 1695
Cite this article:	Tsujii, Toshiaki, Harigae, Masatoshi, Barnes, Joel, Wang, Jinling, Rizos, Chris, "Experiments of Inverted Pseudolite Positioning for Airship-Based GPS Augmentation System," Proceedings of the 15th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2002), Portland, OR, September 2002, pp. 1689-1695.
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