Abstract: An antenna pointing device for use in a satellite tracking system, including a satellite tracking system mounted on a moving body. The tracking system has at least one sensor that generates a signal indicating the orientation of the moving body relative to the satellite. The pointing device includes a base mounted on the moving body, an antenna pointing arm carrying the antenna and a universal joint supported by the base. The pointing arm is rotatably mounted within the universal joint for rotation about first and second control axes, the universal joint being constructed and arranged to enable rotation of the pointing arm through greater than 180 degrees but less than 360 degrees about each of the first and second control axes while suffering no singularities of control.

Abstract: A method and apparatus for conducting DC current in the vicinity of a magnetometer without magnetic field interference thereto. The conductor in the area of the magnetometer is in the form of a plurality of twisted line pairs which are braided or otherwise intertwined to form a generally tubular-shaped construct which is preferably cylindrical. First and second equipotential surfaces are provided on each end of the construct with potential differences which are equal and opposite being applied between the first and second pair of surfaces, respectively. A first line of each twisted pair is connected between the first equipotential surfaces and the other line of each twisted pair is connected between the second equipotential surfaces, resulting in substantial equal and opposite DC currents flowing in the lines of each twisted pair. The magnetometer is positioned within the twisted pair construct, preferably near the center thereof.

Abstract: A method and apparatus for performing range finding and a unique heads-up display for use in such apparatus are provided. Range finding is performed by viewing an object of known height at the location to which a range determination is being made through a transparent digital display on which a reticle is provided. The reticle is preferably in segments with the user adding or substracting segments from the reticle until its height matches that of the sighted image. A processor is provided to which the known height of the object is inputted, either by the user or from storage, with the processor determining range from this known height and the number of segments in the reticle. The range is displayed on the transparent display, permitting a user to simultaneously view both the object and the range indication.