OrbMnvrLongitude:

Path: Orbit/OrbitManeuver

% Computes the delta-V for a longitude only maneuver for a circular orbit.
 The delta-V will have the same units as the velocity entered, using the
 formula:

 $$ DV = 2 v \sin(a/2) $$
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   Form:
   [deltaV, u] = OrbMnvrLongitude( v, i, deltaLon, mu )
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   ------
   Inputs
   ------
   v           (1,1)  Velocity
   i           (1,1)  Orbit inclination (rad)
   deltaLon    (1,:)  Change in longitude (rad)
   mu          (1,1)  Gravitational parameter (optional)

   -------
   Outputs
   -------
   deltaV       (.)  Delta-V data structure. 
                      .total (1,1)	Total required delta-V
                      .angle (1,1) Angle (rad)
   u            (.)  Argument of latitude for the common points
                      .final   (1,1) Final latitude (rad)
                      .initial (1,1) Initial latitude (rad)

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   Reference: Vallado, D. A. (1997.) Fundamentals of Astrodynamics and
              Applications. p. 304.
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