Abstract: A sun-following solar panel stand that includes a frame, a hollow box, rotating and pivoting apparatus, first, second, and third light apparatus, comparing apparatus, and combination determining and comparing apparatus. The frame is horizontally rotatively mountable to a surface and the hollow box is vertically pivotally mounted to the frame. The rotating apparatus rotates the frame as the sun traverses horizontally and the pivoting apparatus pivots the hollow box as the sun traverses vertically. The first light apparatus provide a first light apparatus output responsive to the horizontal position of the sun. The second light apparatus provide a second light apparatus output responsive to the vertical position of the sun. The third light apparatus provide a third light apparatus output responsive to the general position of the sun.

Abstract: A system for assistance in landing a helicopter and for the detection of electro-magnetic anomalies utilizing helicopter blades as carriers of receiving devices in a wide spectrum of electro-magnetic fields with a predicted sensitivity and resolution far in advance of previous systems.