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Proton Series

Proton Series

The Proton 4 satellite

The Proton 4 satellite. (Credit: Soviet Space Program)

The Proton series of satellites were launched by the Soviet Union in the 1960s to study very high energy cosmic rays.

Lifetime: July 1965 (first launch, Proton-1) - July 1969 (last satellite, Proton-4, reenters atmosphere)

Portion(s) of spectrum studied: gamma-ray

Country (primary): Soviet Union

Primary Science

Instruments

Links to more information

Proton 1

Lifetime: July 1965 - October 1965

Science Highlights

  • Measured the intensity and energy spectrum of cosmic gamma-rays over 50 MeV

Proton 2

Lifetime: November 1965 - February 1966

Science Highlights

  • Measured the intensity and energy spectrum of cosmic gamma-rays over 50 MeV

Proton 4

Lifetime: November 1968 - July 1969

Science Highlights

  • Measured the intensity and energy spectrum of cosmic gamma-rays over 50 MeV



 

A service of the High Energy Astrophysics Science Archive Research Center (HEASARC), Dr. Alan Smale (Director), within the Astrophysics Science Division (ASD) at NASA/GSFC

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