$RLL$-realization of two-parameter quantum affine algebra in type $C_n^{(1)}$

We establish an explicit correspondence between the Drinfeld current algebra presentation for the two-parameter quantum affine algebra $U_{r,s}({\mathrm{C}}_n^{(1)})$ and the $R$-matrix realization á la Faddeev, Reshetikhin and Takhtajan.