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•APPROXIMATELY GEOSYNCHRONOUS ORBIT.

•APPROXIMATELY GEOSYNCHRONOUS ORBIT.

becomes less significant at higher altitudes. When the spacecraft is in an almost geosynchronous orbit, the inclusion of lunar and solar attractions may become more important than the spherical harmonic correction, as shown in Table 5-6.

Table 5-6. Acceleration Due to Gravity With Lunar and Solar Corrections for Earth, Moon, and Sun in Syzyfflr*

height (km)

aearth

1 ^moonI

I^sunI

+

0 0

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