• Benson, R. F., and J. M. Grebowsky (2001), Extremely low ionospheric peak altitudes in the polar-hole region, Radio Sci., 36, 277285.
  • Bent, R., S. Llewellyn, and M. Walloch (1972), Description and evaluation of the Bent ionospheric model, Rep. AD 753081, Natl. Tech. Inf. Serv., Springfield, Va.
  • Bilitza, D., and R. Williamson (2000), Towards a better representation of the IRI topside based on ISIS and Alouette data, Adv. Space Res., 25(1), 149152.
  • Huang, X., and B. W. Reinisch (1982), Automatic calculation of electron density profiles from digital ionograms: 2. True height inversion of topside ionograms with the profile-fitting method, Radio Sci., 17(4), 837844.
  • Huang, X., B. W. Reinisch, D. Bilitza, and R. F. Benson (2002), Electron density profiles of the topside ionosphere, Ann. Geophys., 45, 125130.
  • Iwamoto, I. (Ed.) (1985), Summary Plots of Ionospheric Parameters Obtained From ISS-b, vol. 1–4, Radio Res. Lab., Tokyo.
  • Jackson, J. E. (1969), The reduction of topside ionograms to electron-density profiles, Proc. IEEE, 57(6), 960976.
  • Matuura, N., M. Kohtaki, S. Miyazaki, E. Sagawa, and I. Iwamoto (1981), ISS-b experimental results on global distributions of ionospheric parameters and thunderstorm activity, Acta Astronaut., 8, 527548.
  • Pulinets, S. A., V. H. Depuev, A. T. Karpachev, S. M. Radicella, and N. P. Danilkin (2002), Recent advances in topside modeling, Adv. Space Res., 29(6), 815823.
  • Rawer, K., D. Bilitza, S. Ramakrishnan, and M. Sheikh (1978), Intentions and buildup of the International Reference Ionosphere, in Operational Modeling of the Aerospace Propagation Environment, AGARD Conf. Proc., vol. 1, no. 238, pp. 6.16.10, AGARD, Neuilly-sur-Seine, France.
  • Reinisch, B. W. (1996), Modern ionosondes, in Modern Ionospheric Science, edited by H. Kohl, R. Rüster, and K. Schlegel, pp. 440458, Eur. Geophys. Soc., Katlenburg-Lindau, Germany.
  • Reinisch, B. W., and X. Huang (1983), Automatic calculation of electron density profiles from digital ionograms: 3. Processing of bottomside ionograms, Radio Sci., 18(3), 477492.
  • Reinisch, B. W., D. M. Haines, G. S. Sales, R. F. Benson, J. L. Green, and W. W. L. Taylor (2001), Radio sounding in space: Magnetosphere and topside ionosphere, J. Atmos. Sol. Terr. Phys., 63, 8798.