20 January 1970 Cosmos 321 Program: DS. Launch Site: Plesetsk . Launch Vehicle: Kosmos 11K63. Mass: 365 kg. Perigee: 272 km. Apogee: 479 km. Inclination: 71.0 deg.
Investigation of the upper atmosphere and outer space.
10 August 1970 Cosmos 356 Program: DS. Launch Site: Plesetsk . Launch Vehicle: Kosmos 11K63. Mass: 357 kg. Perigee: 231 km. Apogee: 573 km. Inclination: 82.0 deg.
Bibliography:
2 - McDowell, Jonathan, The United Nations Registry of Space Objects, Harvard University, 1997. HTML when accessed: http://hea-www.harvard.edu/QEDT/jcm/space/un/un.html
6 - JPL Mission and Spacecraft Library, Jet Propulsion Laboratory, 1997. HTML when accessed: http://msl.jpl.nasa.gov/home.html