Headlight Effect: Finding $\phi_0$ on Earth

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The discussion revolves around finding the angle \phi_0 on Earth using the headlight effect. The user initially presents the relevant equation for calculating \phi. After some contemplation, the user concludes that they have solved the problem independently and no longer require assistance. The conversation highlights the user's transition from seeking help to resolving the issue on their own. The thread concludes with the user expressing satisfaction with their solution.
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James T. Kirk twice bluffed that the USS Enterprise was equipped twith a corbomite devise that automatically sends a pulse of energy that equals the force put on it. But that's besides the point :P

I have a problem that asks me to find \phi_0 on Earth via headlight effect.

I already have found the equation:
cos(\phi) = (cos(\phi')+ u/c) / (1 + (u* cos(\phi')/c))

Do I simply solve for \phi as \phi_0, or is there some equation for headlight effects? My book and my notes only have a mention of headlight effect, that I can find.
 
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I'm an Engineer not a Doctor!

Okay, I figured it out.

NO HELP NEEDED NOMORES!
 

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