1. Charles Elachi, “Introduction to the Physics and Techniques of Remote Sensing”, John Wiley & Sons, 1987, Chapters 1–1 and 8–8.
2. see chapter 5 in The Interdisciplinary Role of Space Geodesy’, Springer Verlag, 1987, pp. 164–165
3. NASA ‘Topographic Science Report’, 1988, p. 46
4. Introduction to the METEOSAT Operational System, esa BR-32 ISSn 250–1589, Sept. 1987, p. 39
5. P. N. Slater, Remote Sensing, Optics and Optical Systems, Addison—Wesley, 1980, pp. 342–351