Paper
The Feature of Sea Clutter and Its Reason Under Different Evaporation Duct
- Authors:
- Guanlei Xu; Fengwang Lang; Shipeng Su
- Abstract
- The paper begins to study with a view to the character of the sea clutter below different evaporation duct. Frist, the paper simulated and analyzed the atmospheric refraction environment on Dartmouth Canada in 1993. Then, two data files with different strength duct are used to analyze sea clutter strength feature. Moreover, the mechanism of sea clutter is discussed through the ray tracing, the gazing angles and the propagation loss. The main results and contributions are as following: (1) There are evaporation duct phenomena in the Dartmouth experiments; (2) The sea clutter strength in the stronger duct is larger than that in the weaker duct; (3) The character of power spectrum. In the weaker duct, there is a larger value in certain frequency, and the aim’s character is very distinctive. Then, in the stronger duct, power spectrum is uniformity, and the aim’s character is illegibility. (4) To discuss the cause of formation from the character of electromagnetic wave propagation, relative to the weaker duct, the paper found that the electromagnetic wave ray propagates farther, the gazing angles are bigger, and the propagation loss is smaller. All of these are the reasons why sea clutter becomes stronger.
- Keywords
- The Sea Clutter; Atmospheric Duct; Ray Tracing; Gazing Angles; Propagation Loss
- StartPage
- 150
- EndPage
- 157
- Doi