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Prognoz 2



Prognoz 2 was placed in a highly elliplical orbit with apogee 200,000 km, perigee 550 km, and inclination 65 degrees. It carried the first instrument package, SIGNE 1, resulting from the Franco-Soviet SIGNE collaboration. This instrument was intended to perform solar radiation studies. However, it detected cosmic gamma-ray bursts as well as solar events. It reentered the earths atmosphere on 15 December 1982.

The SIGNE 1 detector consisted of a Stilbene scintilator, 38.1 mm in diameter and 38.1 mm high. It was shielded by a plastic anticoincidence scintilator. There were 8 energy channels: 0.4-0.7 MeV, 0.7-1.0 MeV, 1-1.6 MeV, 1.6-2.4 MeV, 2.4-2.9 MeV, 2.9-3.9 MeV, 3.9-8.1 Mev, and 8.1-11.8 MeV. Counts were integrated for every 41 or 160 seconds, depending on the experiment mode. The effective area was 17.1 sq-cm.

Alternate Names

  • 06068
  • Prognoz2

Facts in Brief

Launch Date: 1972-06-29
Launch Vehicle: Modified SS-6 (Sapwood) with 2nd Generation Upper Stage + Escape Stage
Launch Site: Tyuratam (Baikonur Cosmodrome), U.S.S.R
Mass: 845 kg

Funding Agency

  • Unknown (U.S.S.R)


  • Space Physics
  • Solar Physics

Additional Information

Questions and comments about this spacecraft can be directed to: Coordinated Request and User Support Office

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