S. K. Llewellyn

Description and evaluation of the bent ionospheric model. Volume II

R. B. Bent, S. K. Llewellyn, M. K. Walloch, 1972 .

Ionospheric refraction corrections in satellite tracking

P. E. Schmid, R. B. Bent, S. K. Llewellyn, 1971 .

Documentation and Description of the Bent Ionospheric Model

Rodney B. Bent, R. B. Bent, S. K. Llewellyn, 1973 .

NASA-GSFC ionospheric corrections to satellite tracking data

R. B. Bent, S. K. Llewellyn, S. Rangaswamy, 1971 .

Ionospheric range-rate effects in satellite-to-satellite tracking

R. B. Bent, S. K. Llewellyn, P. Schmid, 1977 .