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Chapter 6

Q. 6.10

Determine the required launch azimuth for the sun-synchronous satellite of Example 4.7 if it is launched from Vandenburgh AFB on the California coast (latitude = 34.5^{º}N).


Verified Solution

In Example 4.7 the inclination of the sun-synchronous orbit was determined to be 98.43^{◦}. Equation 6.24 is used to calculate the launch azimuth,

\cos i=\cos \phi \sin A                        (6.24)

\sin A=\frac{\cos i}{\cos l}=\frac{\cos 98.43^{◦} }{\cos 34.5^{◦} }=-0.1779

From this, A = 190.2^{◦}, a launch to the south or A = 349.8^{◦}, a launch to the north.