Determination of an average angular speed of the neutron star.
A pulsar is a quickly rotating neutron star that continuously emits a beam of radio waves in a searchlight manner. Each time pulsar makes one revolution, rotation beam sweeps across the earth, and the earth receives a pulse of radio waves. For one particular pulsar, time between two successive pulses in 0.033s. decides the average angular speed (in rad/s) of the pulsar.