DS-U2-M - 23,296 bytes. 361 x 290 pixels.

Measured micrometeoroid impacts and gamma rays.

Total Mass: 680 kg.

Investigation of the upper atmosphere and outer space.

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