FIELD: measurement equipment.
SUBSTANCE: method is based on deviation of true and measured position of a star observed through earth atmosphere. Deviation is related to atmospheric refraction. For that purpose, measurements of angular distances between visible position of the known star, the beams of which are subject to refraction in atmosphere, and position of each of at least two stars located above atmosphere, the beams of which pass above atmosphere and are not subject to refraction, are performed simultaneously by means of a star instrument. A value of atmospheric refraction angle at measurement is determined as per the measured distances.
EFFECT: determination of an atmospheric refraction value for its use in an independent navigation system of a space vehicle in order to specify orbit parameters.
5 dwg
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