NOVELTY - The frustum has the first material layer that is shaped as a conical frustum, and the first layer comprises a solar reflecting surface. The second material layer is shaped as a conical frustum, and is arranged concentric to and outside the first layer. The second layer is patterned with a dense array of cone-shaped indentations. An array of resin deposits is provided, and each resin deposit is formed at the center of the cone-shaped indentation and contact the first layer. A material layer is a multilayered material.    USE - Solar-concentrating frustum.    ADVANTAGE - The undesired mechanical play is avoided and mechanical spatial resolution is enabled by rigidity in directions other than the desired linear direction of motion. The rigidity and stable positioning capability is provided by an extended spatial relationship between the embodied, mutually guiding, linear bearing assemblies that guide the shuttle tube up and down within the rotating-carriage assembly. The flexible wire harness provides unit for reliable electrical connection between the static wire harness and the azimuthally rotating turret flange, where flange-mounted connector feed-through is attached and provides electrical feed-through interconnection of the flexible wire harness to a flexible wire spiral located above the turret flange and compliant to tilt/altitude motion of the tracking receiver assembly (RTA). The base mount assembly is effectively utilized on an architectural roof structure. The construction of the base-mount assembly provides a readily deployable apparatus that is secured to the roof with relatively little tie-down requirements, and large surface area for load spreading across roofs of limited strength.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) a dual-axis solar-tracker; and    (2) a solar receiver tube providing heated fluid and electrical power.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of the solar tracking apparatus.    Solar heated receiver tube (11)    Concentrator (70)    Frustum structure (80)    Base mount assembly (400)    Base mount tube (410)