| 摘要 |
PURPOSE:To recognize very weak aircraft echoes readily, by comparing the data obtained at every scan with the data which is obtained by performing specified processing on the data stored in the corresponding address in a memory and writing the data having a higher level into the memory. CONSTITUTION:The trigger and azimuth signals from the radar are inputted to an address converter 1 where the signals are converted to address writing signals for the stroage memory 3. An AD converter 2 convertes the analog video signal in real time and the result is stored in the video storage memory 3 in the order of the range. A comparator 9 compares the data obtained at every scan with the data which is obtained by processing the data stored in the corresponding address of the memory 3 in trail control circuit 4, with a specified attenuation characteristic being added. The data having the higher level is written in the memory 3 as new data. |
