Add Herrick-Gibbs IOD method
Gibbs' method suitability for closely spaced positions is limited. There's an alternative for that case, referred to as Herrick-Gibbs in Vallado's book (page 466 in 4th edition)
Gibbs' method suitability for closely spaced positions is limited. There's an alternative for that case, referred to as Herrick-Gibbs in Vallado's book (page 466 in 4th edition)