The (A) over tilde(020)kappa(3) Pi-(X) over tilde(3) Sigma(-)(000) and (A) over tilde(3) Pi(i)(001)-(X) over tilde(3) Sigma(-)(000) bands of the CCO radical have been investigated by laser spectroscopy with two types of tunable laser system. An analysis was made simultaneously for both the bands to establish Line assignments and determine molecular constants for both the (A) over tilde(020) and (A) over tilde(001) states. A coupling constant between these two states was also determined by assuming the interaction to be of Fermi type. (C) 1996 Academic Press, Inc.