Collection of works of the outstanding Russian scientist B. A. Kotelnikova (1908-2005) prepared for the 100th anniversary of his birth This third volume includes his work on radar mapping of the surface of Venus. Radar surveys of the surface of the planet Venus, carried out in 1983-1984. Under the leadership of D. A. Kotelnikova, carried out with the help of on-board complex radar system of automatic interplanetary stations "Venus-15" and "Venus-16" and became the largest achievement of planetary radar Obtaining global images of a planet completely covered by clouds was an outstanding scientific achievement that made a huge contribution to world science. Analysis of these images allowed us to significantly develop our ideas in the field of comparative planetary science. For scientists, specialists, students, as well as for anyone who is interested in the history of development and achievements of domestic science in the field of space exploration and radio astronomy