A raster scan radar display with new scan converting scheme and advanced graphics

A new scan conversion scheme and video memory architecture with advanced graphics for raster scan radar display are proposed in this paper. By taking advantage of a succession of radar range scans, the Cartesian coordinate increments (0 or 1) of every two axial adjacent points are pre-calculated and stored and then the Cartesian coordinates can be reconstructed by counting the increments in real time when converted. This new approach works quickly and precisely and can overcome artifacts in visual effects. The advanced graphics functions of this system greatly improve the display performance, especially the ability of plotting the extracted data. A practical display system based on these principles is developed and implemented. The excellent result proves its feasibility and versatility.