228 



U.S.S.R. 



low-frequency electromagnetic fields. MAGION 

 was the first artificial satellite to be 

 developed and built by Czechoslovakia. 



IK-19 : February 27, 1979, experiments continued on the 



Earth's Ionosphere, wave processes, and radio 

 propagation In the Ionospheric. The equipment 

 and experiments Included those from Bulgaria, 

 Poland, Czechoslovakia and the U.S.S.R. Data 

 from IK-19, IK-18, MAGION, and two U.S. satel- 

 lites were jointly analyzed by scientists In 

 the Soviet Union, the United States, and Japan. 

 The Soviets combined the results from IK-17, 

 IK-18, and MAGION Into a program they 

 called "International Investigations of the 

 Magnetosphere. " 



IK-20 : November 1, 1979, oceanographic research on 



zones of biological productivity In the ocean 

 and sea surface temperatures. The equipment 

 was developed in Hungary, the Democratic Re- 

 public of Germany, Czechoslovakia, and the 

 U.S.S.R. 



IK-21 : February 6, 1981, the satellite was designed to 



study the ocean and land masses; locate areas 

 of high bloproductlvlty and pollution and ice, 

 water, land, and water boundaries; and define 

 optical thickness of the atmosphere and thermo- 

 dynamic temperatures of the ocean's surface. 

 The equipment was from Hungary, the Democratic 

 Republic of Germany, Romania, Czechoslovakia 

 and the U.S.S.R. 



IK-22 /BULGARIA 1,300: August 7, 1981, for ionospheric and magneto- 

 spheric studies. The IK-BULGARIA satellite was 

 named to commemorate the 1,300th anniversary of 

 the founding of Bulgaria. Of the 15 instruments 

 carried by IK-BULGARIA, 12 were from Bulgaria. 

 This included instrumentation for studying ions 

 and electrons in near-Earth space, studying per- 

 manent and varying electronic fields, deter- 

 mining weak emissions of light and ultraviolet 

 radiation, and laser reflectors for goedetlc 

 studies. 



