Abstract: A mobile hedge trimming machine including a two-wheeled carriage which supports a generally vertical, movable and tiltable base assembly, which in turn supports a motor driven hedge trimmer. Angularly displaced from the vertically oriented base assembly is a control column upon which there is located a control handle assembly by which the carriage is moved along a hedge by an operator, and by which the hedge trimmer is oriented both in elevation and tilt.

Abstract: A system for remotely measuring velocities present in discrete volumes of air in which a CO.sub.2 laser beam is focused by a telescope at such a volume, a focal volume, and within the focusable range, near field, of the telescope. The back scatter, or reflected light, principally from the focal volume, passes back through the telescope and is frequency compared with the original frequency of the laser, and the difference frequency or frequencies represent particle velocities in that focal volume.

Abstract: A system for remotely measuring vertical and horizontal winds present in discrete volumes of air at selected locations above the ground. A laser beam is optically focused in range by a telescope, and the output beam is conically scanned at an angle .theta. about a vertical axis. The backscatter, or reflected light, from the ambient particulates in a volume of air, the focal volume, is detected for shifts in wavelength, and from these, horizontal and vertical wind components are computed.