Modification of ultrasonic beamwidths by aperture control
Elliptical mask for transducer aperture to shape far field ultrasonic beam pattern
Boyd, F.↗
Engineering topics
Boyd, F.
Publications and source records attributed to Boyd, F..
Ultrasonic modeling of lunar approach of the lunar excursion module
Ultrasonic modeling system for simulating lunar excursion module landing trajectory on lunar surface
LUNAR EXCURSION MODULE /LEM/↗