What is “Shihshi” Satellite

Four of the series of Chinese science experiment satellites were launched. The “Shihshi” 1 satellite on March 3, 1971issuance. The satellite weighs 221 kilograms and is approximately spherical polyhedron with a diameter of 1 meter. The operational orbit parameters are: perigee 266 kilometers, apogee 1,826 kilometers, inclination angle of 69.9° and period of 106 minutes.

The satellite worked in orbit for about 8 years and crashed on June 17, 1979. Its main task is to test the long-term reliability of solar cells, nickel-cadmium batteries, radiant active thermal control systems and telemetry systems, and detect the physical environment in space during operation.

Satellite detection instruments include infrared horizon and solar goniometer. The operational test results of the “Practice” 1 satellite show that solar cells, nickel-cadmium batteries, radiant active thermal control systems and telemetry systems can withstand the long-term working test, and the satellite also obtained data from the environment space physicist.

Satellite “Practice” No. 1 provides important data for satellite technology, especially the development of satellite power systems, thermal control systems, and radio measurement and control systems.

On September 20, 1981, “One Arrow and Many Satellites” was successfully launched, and three “Shishi” satellites were launched with a “Long March” rocket: Shishi-2, Shishi-2A, “Practice” No. 2B. The “Shihshi” 2 satellite weighs 257 kilograms and is shaped like an octagonal prism, whose circumscribed sphere has a diameter of 1.23 meters and a height of 1.1 meters.

The satellite’s orbital parameters are: perigee 237 kilometers, apogee 1,622 kilometers, inclination angle 60° and period 103 minutes. Its main task is to detect the physical environment in space, test new technologies such as controlling the directional attitude of solar panels in relation to the sun and storing large-capacity data.

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The main detection instruments installed on the satellite are thermal ionization meters, solar X-ray detectors, solar ultraviolet detectors, magnetometers, sun goniometers, scintillation counters, shortwave infrared radiators, longwave infrared radiators, horizon meters infrared, semiconductor electron direction detector, semiconductor proton direction detector, etc.

The operation test results of “Shishi” 2 satellite show that the solar panel is working normally, the satellite has a high precision of directional attitude control towards the sun, and the large capacity data storage system is working well. such as solar ultraviolet rays, solar X-rays, charged particle radiation background and atmospheric ultraviolet background.

The Shishi-2 A satellite and the Shishi-2 B satellite obtained important scientific exploration data with the aid of sounding instruments and also obtained relevant technical test data, providing data for space scientific research. (See color photo)

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