1. Blake, L.V., Ray height computation for a continuous nonlinear atmospheric refractive-index profile,Radio Science, vol. 3, pp. 85–92, 1968.
2. Brussaard, G.,Radiometry: A useful prediction tool?, Ph.D. thesis, ESA SP-1071, 1985.
3. Brussaard, G., The Olympus propagation experiment OPEX-A unique example of European coorporation,ESA Bulletin, vol. 54, pp. 34–38, 1988.
4. CCIR Recommendation 310-6, Standard radio atmosphere, Geneva: International Telecommunications Union, pp. 35–38, 1986a.
5. CCIR Recommendation Rep. 1008, Reflection from the surface of the Earth, Geneva: International Telecommunications Union, pp. 89–95, 1986b.