ELECTRONIC SENSOR, TRACKING, COMMUNICATION, NETWORK, AND TARGETING SENSORS, NAMELY THROUGH-WALL IMAGING AND COMMUNICATION SENSORS, SUBSURFACE SENSORS, GROUND PROBING RADAR, SEISMIC RADAR, ULTRA-WIDEBAND THROUGH-WALL IMAGING AND TARGET DETECTION SENSORS THROUGH-OPAQUE-MATERIAL IMAGING AND TARGET DETECTION SENSORS, FOLIAGE PENETRATION IMAGING AND TARGET DETECTION SENSORS, SUBSURFACE IMAGING AND TARGET DETECTION SENSORS; ELECTRONIC COMMUNICATION SYSTEMS COMPRISED HYBRID MODEMS FOR POWER LINE AND...