Time interval measurements by uniformly accelerating observers   (non-longitudinal case)
  We consider two non-longitudinal Doppler Effect experiments. The first one involves a stationary source of monochromatic light located at the origin O of the K(XOY) inertial reference frame and an observer R who performs the hyperbolic motion at a constant altitude. The second involves a stationary observer located at the origin O and a monochromatic source of light that performs the hyperbolic motion. In both cases we compare the relationship between emission and reception times of the same light signal and the relationship between the emission and the reception time intervals of two successive light signals. 
Stefan Popescu and Bernhard Rothenstein