Assessment of Simultaneous GNSS Occultation Data on Ionosphere Probing

Viet-Cuong Pham and Jyh-Ching Juang

Abstract:	Radio occultation (RO) is a powerful technique that can provide vertical profiles of refractivity, temperature, pressure, and water vapor in the neutral atmosphere and electron density in the ionosphere. Abel inversion methods have been widely utilized to retrieve electron density profiles (EDPs) from RO measurements. It is well known that Abel inversion is subject to errors due to the spherical symmetry assumption. In the paper, we propose an improved Abel inversion technique which considers pairs of ROs approximately occurring at the same time and place. The EDP is retrieved along with horizontal gradients in both GPS-LEO satellite links by the generalized Tikhonov regularization method. Simulations were conducted to evaluate the proposed method.
Published in:	Proceedings of the 27th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2014) September 8 - 12, 2014 Tampa Convention Center Tampa, Florida
Pages:	1508 - 1512
Cite this article:	Pham, Viet-Cuong, Juang, Jyh-Ching, "Assessment of Simultaneous GNSS Occultation Data on Ionosphere Probing," Proceedings of the 27th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2014), Tampa, Florida, September 2014, pp. 1508-1512.
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