TABLE I: Experimental values of the voltage position of the first Fiske step V$_{1}$ , the Swihart velocity, c$_{0}$ , and the resonant frequency, ω$_{0}$ , obtained from Eq.(1). FIG. 4: Experimental I (1) F ( B$_{‖}$ ) curve for the junction without trapped Abrikosov (open circles). Solid line represents the theoretical dependence calculated by Eq.(4) and Eq.(5) for γ = 1 . 1 × 10 $^{10}$s − $^{1}$. Dashed line is the result of calculation without J 2 $_{1}$( a $_{2}$) term at γ = 4 . 3 × 10 9 s − 1 according to the original theoretical analysis of [27]. circles), is shown in Fig. 4. The theoretical dependence for the first Fiske step amplitude on field B$_{‖}$ was numerically computed from Eq. (4) and Eq. (5) in the absence of Abrikosov vortices. The value of the parameter γ = 1 . 1 × 10 10 s − 1 provides a best fitting of ex- perimental data. Similar value of γ can be extracted from the I - V curves where the Fiske resonances were suppressed. The agreement with the theoretical analysis is excellent even for the second and third lobes. In the Ref. [27] a similar theoretical analysis of the Fiske resonances of a junction without Abrikosov vortices has been carried out. However, in the equation determining the amplitude a of electromagnetic waves the term of J$_{1}$ was omitted. Taking into account this term one can get a better agreement with experimental data. 12 -10.0 -5.0 0.0 5.0 10.0 0.0 0.1 0.2 0.3 0.4 Amplitude of the First  Fiske Step (mA) Parallel Magnetic Field (G) V$_{1}$ ( µV ) c$_{0}$ ( m/s ) ω$_{0}$ ( s − $^{1}$) 226.3 1 . 1 × 10 7 6 . 9 × 10 11