ADCP wave tide equipment measures wave directional spectrum using ADCP wave gauge technique.Since broadband ADCP has unique measuring points array

it not only has high-precision measurement of wave directional spectrum just as traditional arrays

but also is easy to handle like buoy because ADCP is a single device.The inner attitude sensors（heading

pitch

roll） used in ADCP need real time measurement

when there is a large tilt in ADCP

tilt correction should be carried out based on measurement value of attitude sensors

there are two ways to do wave directional spectrum based on ADCP

beam velocity method（Radial） and water particle velocity method（UVW） carry out position correction and velocity correction separately.Attitude sensors used in wave directional spectrum estimation based on ADCP wave gauge is described in detail.Through three sets of data analysis

the significance of attitude sensors in wave directional spectrum measurement of ADCP wave gauge is verified.