Synchrotron emission maps produced using the static particle spectra (top panels) and evolving particle spectra (bottom panels) with an initial power-law index p = 3 for case UNI-A at t/t_a = 2.25 projected on the sky plane X′–Y′. These maps are obtained for a direction along a line of sight inclined at 20° with the jet axis at three different observing frequencies normalized to the frequency scale ν_sc = 122 Hz. The color bar represents the magnitude of specific intensity I_ν normalized to the specific intensity scale I_νsc = 7.46 × 10⁻⁹ ergs s⁻¹ cm⁻² Hz⁻¹ str⁻¹.