  We apply the algorithm published by Liang et al. (2014) to describe the
Double Pulsar system J0737$-$3039 and extract the sense of rotation of first
born recycled pulsar PSR J0737$-$3039A. We find that this pulsar is rotating
prograde in its orbit. This is the first direct measurement of the sense of
rotation of a pulsar with respect to its orbit and a direct confirmation of the
rotating lighthouse model for pulsars. This result confirms that the spin
angular momentum vector is closely aligned with the orbital angular momentum,
suggesting that kick of the supernova producing the second born pulsar
J0737$-$3039B was small.
