Here you can create your gravity formula by entering angles/tilt and the corresponding gravity. These values will be saved for future use. Angles with 0 (zero) will be skipped. The values below will be used to check the formula and if the deviation is more than 1.5SG / 0.38P on any of the provided points then the forumla will be rejected. On the bottom of the page you can see a graph over the entered values + values calcualated by the formula.