Radar Basics. Radar Scan Conversion. A surveillance radar supplies its measured data in polar coordinates, i. Radar scan conversion involves the transformation of data in a range- azimuth format. The radar stores its raw data into a table. This table is also referred to as. The table columns represent all possible measurable range steps. Each table row represents a complete pulse period, which took place in a certain azimuth angle. The first line is the azimuth angle of 0°, ie: the north direction. In each cell of the table is a number representing the brightness of this cell on the screen. If this table would be represented as a bitmap without a signal conversion on a. To generate a picture similar to a. SPx-Scan Radar Scan Conversion CP-16-120-03, V2.0 DATA SHEET SPx-Scan, Cambridge Pixel’s software-based radar scan converter, provides a field-proven, high quality. Eagle-2 radar scan converter PMC improves performance & supports high-resolution screen displays up to 2560 x 1600, including 2048 x 2048. Learn more! Radar Scan Conversion Formats. Radar Scan Conversion is the process that converts radar video from a range-azimuth format into an alternate coordinate system that. X- Y- format. It must be calculated, in which row- number (Y ). X ) should light up. This conversion is a pure trigonometric calculation: X = r sin β + XC (1) Y = r cos β + YCThe values of (XC , YC). The table with the rawdata, however, the single range cells have a different size as function of their distance from the radar. Targets, which are on a PPI scope close to the radar site, are smaller than the targets on the screen edges. The calculations can already be quite inaccurate near the inflection points of the trigonometric functions. Therefore, the opposite approach is taken in practice: the so called reverse processing. Radar raster scan coordinate converter is the most important part of a radar raster scan display system. CPLD-one of the FLEX10K series as an example is used to. Eagle-2 Radar Scan Converter provides improved performance and support for high-resolution screen displays up to 2560 x 1600.In a further table, an azimut angle and a range is stored for each pixel of each line of the monitor. With these optimized values. Side angle corresponds to the line number; distance corresponds to the column number). XY format. With this radar signal conversion an additional inaccuracy in the determination of coordinates arises by the radar. The center of a cell in the raw data table rarely corresponds to the center of the pixel in the image line. The additional inaccuracy corresponds to a pixel size. The smaller the pixels are relative to the target size in the raw data table, the less these additional inaccuracy. However, the smaller are these pixels, the more pixels light up to indicate a rather large target. Not every pixel should then get the full brightness of the target character. In a good software for radar signal converting the values for each pixel are weighted in order to avoid artifacts and holes.
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