TY - GEN
T1 - Assessment of simultaneous GNSS radio occupation data for ionosphere probing
AU - Pham, Viet Cuong
AU - Juang, Jyh Ching
PY - 2014/1/1
Y1 - 2014/1/1
N2 - 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.
AB - 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.
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M3 - Conference contribution
AN - SCOPUS:84939431764
T3 - 27th International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS 2014
SP - 1508
EP - 1512
BT - 27th International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS 2014
PB - Institute of Navigation
T2 - 27th International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS 2014
Y2 - 8 September 2014 through 12 September 2014
ER -