Abstract: A long range volumetric scanning radar system is described, which is capable of simultaneous height finding using a frequency scan (inertialess) technique in the elevation plane, and conventional azimuth scanning (as by rotation of the antenna system) to provide Plan Position Indicator (PPI) coverage. Height finder video is generated relatively rapidly by the elevation frequency scan so that only negligible movement of the antenna in azimuth takes place during each elevation scan cycle. Successively generated discrete partially overlapping pencil beams provide the elevation scan, and a system for adding the video echoes derived from target illumination by these beams is included to provide a PPI presentation which includes all target information up to a predetermined elevation angle. The video addition is accomplished by a novel summing and base clipping arrangement which improves the signal-to-noise ratio of the composite video signal thus obtained.