Plasma density gradients at the edge of polar ionospheric holes: the absence of phase scintillation

Jenner, L. A., A. G. Wood, G. D. Dorrian, K. Oksavik, T. K. Yeoman, A. R. Fogg, and A. J. Coster (2020), Plasma density gradients at the edge of polar ionospheric holes: the absence of phase scintillation, Annales Geophysicae, doi.org/10.5194/angeo-38-575-2020