LTSpiral:

Path: Orbit/OrbitManeuver

% Low thrust delta v between two circular orbits. 

   The acceleration is aligned with the velocity vector. This equation is 
   an approximation assuming the orbit is nearly circular throughout the 
   spiral. See also LowThrustEscape.

   Since version 1.
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   Form:
   [dV, dVRatio, t] = LTSpiral( a0, af, accel, mu )
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   ------
   Inputs
   ------
   a0    	(1,:)   Initial semi-major axis
   af    	(1,:)   Final semi-major axis
   accel   (1,1)   Acceleration
   mu      (1,1)   Gravitational parameter

   -------
   Outputs
   -------
   dV      (1,:)   Total delta-v
   dVRatio (1,:)   Ratio of total delta-v to Hohmann Delta-V
   t       (1,:)   Maneuver duration (days)

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   References: Wiesel, W. E., Spaceflight Dynamics, McGraw-Hill, 1988,
               pp. 89-90.
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Children:

Common: Database/Constant
Common: Graphics/Plot2D
Orbit: OrbitManeuver/DVHoh

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