Lowered acoustic doppler current profiler, utra-short baseline (LADCP-USBL) combined observation and data processing method and apparatus

A lowered acoustic doppler current profiler, ultra-short baseline (LADCP-USBL) combined observation and data processing method, the method comprising:

• acquiring bottom tracking data from a lowered acoustic doppler current profiler (LADCP), and position trajectory data collected by an ultra-short baseline (USBL) and ocean current data collected by the LADCP;
• removing abnormal data points from the position trajectory data;
• performing azimuth angle correction on the position trajectory data according to the bottom tracking data to determine a movement velocity of the LADCP;
• and
• calculating an absolute ocean current velocity according to the movement velocity of the LADCP and the ocean current data;
• wherein the step of performing azimuth angle correction on the position trajectory data according to the bottom tracking data comprises:
• determining a fitted curve according to the bottom tracking data and the position trajectory data in a near-bottom layer;
• and
• performing azimuth angle correction on the position trajectory data according to the fitted curve.