Yang Su, Gary S. Bust, Kshitija B. Deshpande and Seebany Datta-Barua. "Estimating Height and Thickness of an Ionospheric Irregularity Layer with a Closely-Spaced GNSS Receiver Array" Proceedings of the 30th International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS+ 2017) (2017)
Available at: http://works.bepress.com/kshitija-deshpande/12/