DS-U3-S satellite Credit - © Mark Wade

Specialized orbital solar observatory for measuring solar rays in multiple spectral zones.

Typical orbit: 288 km x 551 km at 48 degrees inclination. Mass: 360 kg (790 lb). Associated Launch Vehicle: Kosmos 11K63.

• 1967 June 16 - Cosmos 166 - Program: DS. Launch Site: Kapustin Yar. Launch Vehicle: Kosmos 11K63. Mass: 357 kg (787 lb). Perigee: 288 km (178 mi). Apogee: 555 km (344 mi). Inclination: 48.40 deg. Period: 93.00 min.

  Specialized orbital solar observatory for measuring solar rays in mulitple spectral zones.

• 1968 July 5 - Cosmos 230 - Program: DS. Launch Site: Kapustin Yar. Launch Vehicle: Kosmos 11K63. Mass: 367 kg (809 lb). Perigee: 287 km (178 mi). Apogee: 546 km (339 mi). Inclination: 48.40 deg. Period: 92.90 min.

  Specialized orbital solar observatory for measuring solar rays in mulitple spectral zones.

• JPL Mission and Spacecraft Library, Jet Propulsion Laboratory, 1997. Accessed at: http://msl.jpl.nasa.gov/home.html.

• Krebs, Gunter, Gunter's Space Page, University of Frankfurt, 1996. Accessed at: http://www.skyrocket.de/space.

• McDowell, Jonathan, Jonathan's Space Home Page, Harvard University, 1997-present. Jonathan McDowell's complete on-line listing of all objects orbited and over 20,000 rocket launches Accessed at: http://www.planet4589.org/jsr.html.

• USAF Satellite Database, USAF Institute of Technology, 1995. Accessed at: ftp://archive.afit.af.mil/pub/space/.

• Agapov, V, Novosti Kosmonavtiki, "K zapusku pervovo ISZ serii 'DS'", 1997, Issue 6.