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Automated Astroposition Determination Using Sensor Array Systems

A new method to determine the astronomic longitude is described. The standard optical micrometer of the T-4 theodolite is substituted by an optical sensor array system that is placed in the focal plane of the T-4. The image of a star is projected on the sensor array and converted into an electrical signal. The signal is consequently processed in a signal processor and accurately recorded. The signal processing procedure is designed to eliminate the need for an observer. Longitude determinations using stars of various magnitudes are described resulting in an accuracy of ±0.5¿.