Target detection identification method and system in low altitude and sea surface environment

The invention provides a target detection identification method and system in a low altitude and sea surface environment. The method comprises steps of establishing a space virtual reference coordinate system and carrying out self-calibration; for different measurement conditions, using corresponding coordinate conversation methods, allowing data of measurement points and targets to be establishedin the space virtual reference coordinate system; calculating all geometrical parameters of each target and coordinates of the target; through two radars in different heights, carrying out self-calibration and blind supplementation; by use of a de-noising method of interframe correlation, processing radar signals; and carrying out information fusion processing on multi-source target data in the radars and carrying out target detection and tracking. According to the invention, by use of dynamic self-calibration technology, and adaptive detection and recognition technology, strong sea clustersare inhibited; positioning precision and recognition rate of the targets are improved; target detection ability for observing sea area during day and night in a severe weather environment is improved;and effective detection, tracking, recognition and law enforcement monitoring evidence obtaining for small targets on the sea surface and low-altitude small targets like unmanned aerial vehicles areachieved.