I was wondering if there was an optimal law for the thrust (magnitude and direction) during the lunar ascent. I have read many things about this topic in this forum but I still have some doubts. It should be a linear steering law, but what are the values of the constants? What is the actual guidance law used in Apollo 11 for? There is no non-linear parameterization fot the thrust angle that also changes according to the direction of the velocity of LM?