An Efficient Computation of Effective Ground Range Using an Oblate Earth Model

Table 2

Comparison of lengths of major axis using oblate spheroid Earth model from a launch city A (−100°, 30°).

(Longitude, latitude)	Major axis length; ND method (km)	Major axis length; MF method (km)	Difference (m)
(60°, −30°)	6378.14	6378.11	27.03
(30°, −30°)	6378.14	6378.11	25.84
(75°, −30°)	6378.14	6378.11	27.08
(95°, −30°)	6378.14	6378.11	27.11
(10°, 25°)	6378.14	6378.12	19.67
(0°, 0°)	6378.14	6378.11	26.93
(−100°, −30°)	6378.14	6378.14	0