Radio echo detection system

Claim 1

A RADAR SYSTEM COMPRISING MEANS FOR GENERATING A SERIES OF SHORT DURATION PULSES OF HIGH FREQUENCY ENERGY, MEANS FOR RADIATING SAID PULSES IN THE DIRECTION OF THE AREA TO BE SEARCHED, MEANS FOR CHANGING FROM ONE PULSE TO THE NEXT THE CARRIER FREQUENCY OF SAID PULSES IN A PREDETERMINED MANNER, MEANS FOR RECEIVING A CORRESPONDING SERIES OF GROUPS OF ECHO SIGNALS FROM THE AREA TO BE SEARCHED, INDIVIDUAL ECHO SIGNALS WITHIN EACH OF SAID GROUPS RESULTING FROM THE REFLECTION OF SAID TRANSMITTED PULSES FROM INDIVIDUAL OBJECTS AND SUBAREAS WITHIN SAID AREA TO BE SEARCHED, AMPLIFIER-DETECTOR MEANS ASSOCIATED WITH SAID SIGNAL RECEIVING MEANS FOR PROVIDING CORRESPONDING GROUPS OF VIDEO SIGNALS REPRESENTING THE AMPLITUDE OF THE SIGNALS RETURNED BY SAID OBJECTS AND SUBAREAS, MEANS FOR COMBINING CORRESPONDING INDIVIDUAL VIDEO SIGNALS FROM A SELECTED PLURALITY OF SUCCESSIVE GROUPS TO PROVIDE GROUPS OF COMPOSITE VIDEO SIGNALS, THE AMPLITUDES OF INDIVIDUAL COMPOSITE VIDEO SIGNALS BEING DEPENDENT ON THE AMPLITUDE DISTRIBUTION OF THE ECHOES RETURNED BY SAID OBJECTS AND SUBAREAS, AND AN INDICATOR MEANS RESPONSIVE TO SAID COMPOSITE VIDEO SIGNALS FOR PROVIDING AN INDICATION OF THE AMPLITUDES THEREOF.