V.M. Rabolu said:
If you want to discern where you are, whether you are in the physical or in the astral, look at everything that is around you, people, houses, the place, and ask yourself the question: "Why am I seeing this or that?" with wonder. "Am I in the astral body or in the physical body?" And you do a little jump with the intention of floating.
It is not necessary for you to jump a meter: with some centimeters that you raise yourself from the ground you already know whether you are there physically or not. If you do not float it is because you are in the physical, but if you float it is because you are in the astral body.