K. Hosokawa, K. Shiokawa, Y. Otsuka, T. Ogawa, J.-P. St.-Maurice, G. J. Sofko, and D. A. Andre. Relationship between polar cap patches and field-aligned irregularities as observed with an all-sky airglow imager at Resolute Bay and the PolarDARN radar at Rankin Inlet. J. Geophys. Res., volume 114, 2009 .