Engineering Notes Enhancing Lambert Targeting Methods to Accommodate 180-Degree Orbital Transfers

a = semimajor axis, m C = hodograph parameter (centerpoint ordinate), m=s e = eccentricity, (unitless) f, g = Lagrangian coefficients (unitless) p = orbit parameter (semilatus rectum), m R = hodograph parameter (radius), m=s r = position vector, m v = velocity vector, m=s x, y = modified hodograph abscissa and ordinate, m=s t = time of flight, s = transfer angle, rad = gravitational parameter, m=s = true anomaly, rad = flight-path angle, rad