Current research on the 490 nm diffuse attenuation coefficient are mostly about the building of inversion model at 490 nm band

but has no connection with airborne LIDAR hydrographic ability. This study attempts to determine the hydrographic parameters (532) and

which could be used to estimate the ability of the airborne double-color hydrographic LIDAR system and the important parameters for the flying scheme. First

the importance of the diffuse attenuation coefficient (532) and as the hydrographic parameters for the airborne double-color hydrographic LIDAR system is analyzed. Then

according to the in situ measured data in the Yellow Sea and East China Sea coastal areas and the existing diffuse attenuation coefficient retrieval algorithms modified in this study

the linear correlation of (532) and (490) and the exponential correlation of and (532) are derived. Based on the Moderate Resolution Imaging Spectroradiometer(MODIS) (490) products and the aforementioned functions

the hydrographic parameters (532) and are obtained. The hydrographic parameters derived by the method employed in this study can be used availably to estimate hydrographic ability

whose accuracy depends on the accuracy

distribution

and quantity of measured optical data and the accuracy of MODIS (490) products.