Abstract: An apparatus which can be carried to a field sight to locate current and future positions of geosynchronous satellites orbiting the equator in the Clark Belt Altitude. The apparatus corrects the error in viewing angle by providing corrections in longitude and latitude deviations caused by the location of the antenna. The apparatus will provide the user a means of accurately locating a satellite with regard to existing terrain and the obstacles which would interfere with signals between the ground position and the satellite.

Abstract: The sighting angles to above horizon points in the geostationary satellite orbit around the earth are determined from any known location on the earth with this device.

Abstract: A technique is disclosed herein for evaluating solar exposure at various points in any one of a number of given geographic locations for any given period during the year in order to determine the most efficient location for a solar collector. This technique may be carried out utilizing a single apparatus which is also disclosed herein and which includes a solar pointing device and the necessary indicia to appropriately orient the pointing device with respect to its environment at the various points selected. Once the pointing device is oriented, it is moved in a solar pointing position in an way which determines the path of the sun between sunrise and sunset for each point. From these paths, the amount of actual solar exposure at each of the points selected can be determined taking into account any resulting obstructions such as trees, rooflines or the like.

Abstract: A sundial which is adjustable with respect to its mounting location to correct for its earth location in both longitude and latitude. The sundial is provided with solar time equation indicia and indicator to correct real solar time to mean solar time and includes further indicia to determine the calendar date based on sun declination.

Abstract: A device for identifying and locating a star in the heavens including an axis rod having a globe rotatably mounted thereon. A hoop is rotatably mounted on the axis rod for rotation about the globe. A mount having a sighting tube thereon is slidably mounted on said hoop with a screw member carried by the mount for engagement with the globe to secure the hoop and globe against rotation. The mount for the sighting tube has a pointer thereon for positioning the mount relative to star location on the globe. The axis rod is mounted on a universal joint secured to a stand for selectively positioning the angle of the axis rod and globe. The axis rod has a take-up nut thereon for engagement with the globe to prevent rotation of the globe on the rod.

Abstract: A mechanical device adapted for determining the position of an observer by star-sight observations comprising a hollow portable sphere, having a number of sets of pairs of holes, the two holes in each set lying at diametrical extremities by which the sphere can be releasably engaged in a rigid ring, such that the sphere is rotatably mounted in the ring for rotation about an axis passing through the diametrically-opposed holes. A slidable carriage is mounted on the ring for travel in the plane thereof and markings are formed on the ring for determining the position of the carriage thereon. The position of an observer is determined from three simultaneous observations of suitably selected stars by means of the corresponding true circles of altitudes which are inscribed on the surface of the sphere for observation. star of obsevation.