Implemented forward and backward conversion of (X, Y, Z) coordinates to latitude and longitude on the Moon surface. Added another optimization method: “target practice to a point on the Moon surface”. Now it is possible to set target latitude and longitude on the Moon and try to reach it by (a) adjusting time of a main impulse engine firing, (b) adjusting correction impulse (total 150gr propellant) firing angle. Results are – adjusting (a) – gives the error 300km, combination (a) and (b) gives error 600m. What is bad in all this trajectories - landing happened 3 days before sunrise on the moon’s surface. What a . . . setback! That trajectories require for the vehicle to be able to survive 3 earth-days-1/4-moon-night?
see more on: http://www.adobri.com/ProjectTra.aspx