Focusing in the stationary phase approximationNICKISCH, L. J.Radio science. 1988, Vol 23, Num 2, pp 171-182, issn 0048-6604Article

Non-uniform motion and extended media effects on the mutual coherence function : an analytic solution for spaced frequency, position, and timeNICKISCH, L. J.Radio science. 1992, Vol 27, Num 1, pp 9-22, issn 0048-6604Article

An ionospheric propagation prediction method for low latitudes and mid-latitudesHOUPIS, H. L. F; NICKISCH, L. J.Radio science. 1991, Vol 26, Num 4, pp 1049-1057, issn 0048-6604Article

Real-time reconstruction of the three-dimensional ionosphere using data from a network of GPS receiversFRIDMAN, Sergey V; NICKISCH, L. J; AIELLO, Mark et al.Radio science. 2006, Vol 41, Num 5, issn 0048-6604, RS5S12.1-RS5S12.7Article

Range rate : Doppler correlation for HF propagation in traveling ionospheric disturbance environmentsNICKISCH, L. J; HAUSMAN, Mark A; FRIDMAN, Sergey V et al.Radio science. 2006, Vol 41, Num 5, issn 0048-6604, RS5S39.1-RS5S39.9Article