GREAT ELLIPTIC SECTION 



Major semiaxis is a 



Minor semiaxis is bo =a"vF^siri^^ 



a,e are semimajor axis and eccentricity of the ellipsoidal nneridian 



00 is the geocentric latitude of the vertex Po of the 



Great Elliptic Section 



eo is the eccentricity of the Great Elliptic 



Co =(a^bo^)^/a = e sin Qo = (e^*/|-e^/a)Nosin0o 



Coordinates of Po are Po (a cos 0o cos A.o,a cos 0o sin A.o, b s\r\Qo) or in 



terms of geodetic latitude 0o 



Po(No COS0O cosaA.o,No cos 0o sin flA.o,No(i-e^)sin ^o) 



Figure 15. Elements of the great elliptic section. 

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