Algorithms of measuring the angular coordinates of objects with an unknown baseline on the basis of global satellite navigation systems

Global satellite navigation systems intended for high precision measurement of coordinates, velocities and time have been widely developed. The study of equipment functional possibilities for users of these systems is of great interest. Of particular importance is the study of possibilities to measure, on the basis of global satellite navigation systems, an object's angular coordinates with a high accuracy, for example, space vehicles where it is of vital importance to know the base angular position in relation to both a precision antenna pointing to the Earth and orientation of solar cells and sidereal transducers. When measuring the angular coordinates the following cases are discussed: measurement of the angular coordinate position of the baseline-vector lying in a horizontal plane; measurement of the baseline-vector space angular position; measurement of object space angular position. The task of angular coordinate measurement may be complicated if the baseline-vector is a priori unknown.