Figure 4
Comparison between the theoretical and experimental Doppler shifts.
The surface is the theoretical shifts based on Equation (3) while the markers are experimental shifts, with yellow cross-shaping markers as inverse Doppler shifts and green dots as normal Doppler shifts. Lines a, c are experimental shifts picked to underline the inverse and normal Doppler shifts separately. Line b is the measured zero Doppler shifts in the resolution of 0.2 MHz.
