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Experiments with optical instrumentsPhotography was used to document known defects of the periscopic instrument used to check spacecrews in the descent module of the Soyuz T-4. The screen of the altitude control unit was also photographed and revealed glare in the central field of vision. A light filter was installed in the peripheral window to observe the Sun and horizon of the Earth. Checking attitude control by means of polaroids enabled a 5 further advance (500 km) into the zone of shadow. The attitude control unit was used to check the orbital orientation with respect to the vertical during the night segment of flight. A lens screen was used for the emission glow of the atmosphere at an altitude of about 100 km. Docking of the Soyuz T-4 was observed by means of an onboard display, a television camera, and a sighting device. From a distance of about 5 km, the space station could be seen as a bright dot in the sighting device. Docking occurred in shadow.
Document ID
Document Type
Reprint (Version printed in journal)
Savinykh, V. (NASA Headquarters Washington, DC United States)
Date Acquired
September 4, 2013
Publication Date
May 1, 1983
Subject Category
Report/Patent Number
NAS 1.15:77225
Funding Number(s)
Distribution Limits
Public Use Permitted.

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NameType 19830023190.pdf STI