I figured you guys would be the best to ask. If I have a video of a skyline and an object in the sky (say an al jazeera video of a rocket that may have fallen and hit a hospital parking lot), what's the best way to find the angle that object is making with the horizon at the point of the camera? i know trigonometry and i know id use a sextant if i were actually standing at the position of the camera. but doing it from a video seems tricky. any advice?