1. Grewal, M.S., Weill, L.R., and Andrews, A.P..: ‘GPS, INS and integration’, (Wiley & Sons 2001),pp. 131–152, 172–173
2. Carrara, W.G., Goodman, R.S., and Majewski, R.M.: ‘Spotlight synthetic radar signal processing algorithms’, (Artech House Inc. 1995), p. 225, pp. 401–439
3. Schreier, G., ‘SAR geocoding-data and systems’, (Wichmann, Karlsruhe, Germany 1993)
4. Northrop Grumman website. www.ngnavsys.com