I'll see if I can boot it up and send you the output later. It's been awhile. If I can get it working, I'll ask you to give me a bunch of inputs (speed, trajectory, altitude, etc) and I'll send you the output. I had the speed and trajectory calculated every 0.1s so it was relatively accurate. I was planning to add in boosters and parachutes, but I never got that far. The best I can. Give you os how long it takes to plummit into the ground and at what speed lol...

It was pretty cool as it would correctly show orbits and the effect of atmospheric drag if you didn't fully descend in the first orbit around the planet, so you'd just see it loop around several times until it bled off enough speed to eventually descend into the atmosphere. I think I managed to get coreliolis effects added before I stopped messing with it.