The absorption cross-sections of COClF have been measured in the wavelength range 200--260 nm at temperatures ranging from 298 to 223 K with a spectral resolution of 0.05 nm using diode array spectroscopy. The absorption cross-sections were used to calculate photodissociation rate constants at different solar zenith angles as a function of altitude. Temperature effects of the photodissociation rate constants are discussed. ¿ American Geophysical Union 1993