DEVICE FOR REMOVING SEA RETURNS FOR RADAR SYSTEM

摘要

P THE INVENTION CONCERNS RADAR SYSTEMS. / P P TO ELIMINATE ECHO RETURNS FROM THE MARINE HOLLY WATER, WE ARE SUBTRACTING 36 BETWEEN THE LEVEL OF AN ECHO RECEIVED AND THAT OF THE PREVIOUS ECHO. IF THESE ECHOS ARE DONE AT THE HEAT, THEY ARE SIGNIFICANTLY IDENTICAL (ESPECIALLY AFTER LOGARITHMIC COMPRESSION) AND THE SUBTRACTION REMOVES THEM. IF A USEFUL ECHO IS PRESENT, OF AMPLITUDE SUPERIOR OR LOWER TO THE RETURNS OF SEA, THE SUBTRACTION ENHANCES THIS ECHO. ONLY THE USEFUL ECHOES COME FROM THE CIRCUIT ACCORDING TO THE INVENTION. THIS SYSTEM IS INHIBITED 10 IN THE ABSENCE OF SEA RETURNS (RECORDED BY THEIR DENSITY IN TIME). / P P APPLICATION TO ALL RADAR SYSTEMS WORKING IN A MARINE ENVIRONMENT. / P