DS-U2-K

In December 1959, the Interdepartmental Scientific and Technical Council for Space Research was created at the USSR Academy of Sciences , headed by Academician M.V. Keldysh , which is charged with developing thematic plans for the creation of spacecraft, issuing key thematic tasks, and coordinating research work and the development of the upper atmosphere and outer space, the preparation of questions of organizing international cooperation in space research. ^[3]

The member of the Presidium of the Interdepartmental Scientific and Technical Council for Space Research is approved by MK K. Yangel . In the field of applied tasks of carrying out such work, NII-4 of the USSR Ministry of Defense was entrusted. ^[3]

In 1962, the spacecraft “ DS-A1 ”, “ DS-P1 ”, “ DS-MT ” and “ DS-MG ” were included in the second-phase launch program of the “ 63C1 ” launch vehicle . ^[four]

The positive results of the first works, which confirmed the prospect of remote methods for solving scientific and applied problems, stimulated a huge flow of applications for the development of new research spacecraft with various target equipment on board. ^[5]

After conducting search design work on the development of a new modification of research satellites, it became obvious that due to the variety of research tasks and the differences between the requirements for the new series, it was almost impossible to develop a device of the same type. ^[6]

In 1963, it was decided to create three modifications of the unified satellite platform: ^[6]

• DS-U1 - a spacecraft non-oriented in space with chemical energy sources;
• DS-U2 - a spacecraft not oriented in space with solar batteries, as an energy source;
• DS-U3 is a Sun- oriented spacecraft with solar panels, as an energy source.

Corps

The main unit of each modification of the unified platform is a sealed enclosure made of a special aluminum alloy - AMg-6 , which was dictated by the need to ensure certain climatic conditions in the middle of the apparatus. ^{[6] The} cylindrical housing 1.46 m long and 0.8 m in diameter is conventionally divided into three compartments:

• compartment of scientific equipment;
• compartment of the complex of main and auxiliary systems;
• power supply compartment.

Solar panels

The solar battery with a total area of ​​5 m ² is an octagonal prism with four rotary panels. The basis of the solar battery is a stamped frame made of a combination of aluminum and magnetic alloys. ^[7]

On the faces and end surfaces of the frame, stationary solar panels are installed. Four pivot panels are attached to the frame using pivot mechanisms.

In the transport position, the rotary panels of the solar battery are fixed to the frame in a collapsed position. The detachment and installation of solar panels occurs during the separation of the spacecraft from the launch vehicle.

All modifications of the DS-U2 and DS-U3 satellite platforms used photovoltaic power supply systems with solar panels of silicon photoconverters and electrochemical batteries of silver-zinc batteries.

Onboard hardware complex

The on-board hardware complex of the spacecraft of the DS-U2-GK type is intended for command-information, energy, climate and service support of the functioning of the target equipment for the spacecraft. ^[8]

The structure of the radio complex includes:

• “ BRKL-B ” - command radio link equipment, is a narrow-band receiver-decoder of signals transmitted from the Earth to convert them into immediate execution commands;
• “ Crab ” - the orbit and telealarm radio monitoring equipment is a transmitter of a highly stable two-frequency coherent radiation signal, which is used by a ground station to

determining the orbital speed of the spacecraft, as well as for transmitting information from telemetry sensors;

• “ Tral-P2 ” - telecontrol equipment with memory “ZU-2S”; ^[8]

The structure of scientific equipment includes:

• " UER-1A " - a device for recording the angular and energy distributions of electrons ;
• " DA-1A " - low-energy electron spectrum analyzer;
• “ KL-1A ” - cosmic ray intensity sensor; ^[9]
• " МСУ-Ш " - magnetic sedation system.

The satellite platform of the spacecraft type "DS-U2-K" was intended for complex geophysical studies in the circumpolar regions of the upper layers of the Earth's atmosphere.

The following organizations were customers and directors of this scientific experiment:

• Space Research Institute of the Academy of Sciences of the USSR (now - IKI RAS );
• Research Institute of Nuclear Physics of Moscow State University of the Ministry of Higher and Secondary Special Education of the Russian Federation (now - SINP MSU );
• Marine Hydrophysical Institute of the Academy of Sciences of the Ukrainian SSR .

On the basis of the DS-U2-K platform, the Cosmos-426 spacecraft was developed and launched on June 4, 1971 from the launch pad of the Plesetsk Cosmodrome

During the operation of the DS-U2-K satellite platform, regular observations of geoactive corpuscles were carried out and the anisotropic distributions of the Earth's magnetic field were investigated.

Also, during the experiment, the structural parameters of the upper atmosphere were measured and the global distribution of corpuscular streams was studied and the relationship of their intensity with the luminosity of auroras was determined .

• Cosmos (spacecraft)
• Dnepropetrovsk satellite
• DS-MT
• DS-U2-I
• DS-U2-V
• Design Bureau "South"

• Rockets and spacecraft Design Bureau "Southern" / Under the total. ed. S. N. Konyukhova . - Dnepropetrovsk: LLC “Kolograf”, LLC RA “Tandem-U”, 2001. - T. 1. - 240 p. - 1100 copies. - ISBN 966-7482-00-6 .
• V. Agapov. By the launch of the first satellite of the DS series // Cosmonautics News: journal. - M .: Videocosmos, 1997.- T. 7 , no. March 10-23 , No. 6/147 . Archived February 2, 2014.

• Space launches and events in the USSR and Russia (Neopr.) . Cosmos.info. Date of treatment May 3, 2013. Archived May 12, 2013.
• NSSDC Master Catalog Search . NSSDC Master Catalog Search. Date of treatment May 3, 2013. Archived May 12, 2013.