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Proton Precessional Magnetometers

NSSDCA ID: 1964-013A-01

Mission Name: Cosmos 26
Principal Investigator:Mr. Sh. S. Dolginov


The spacecraft Cosmos 26 and Cosmos 49 represented the U.S.S.R. contribution to the IQSY World Magnetic Survey and the bilateral agreement between the U.S.A. and the U.S.S.R. on the peaceful uses of outer space. These spacecraft provided scalar measurements of the intensity of the geomagnetic field at altitudes between 270 and 500 km throughout the entire orbit. The Cosmos 26 spacecraft carried two proton magnetometers with the axes of their polarize-sense coils oriented at an angle of 90 deg to each other. An onboard timer turned on the two magnetometers alternately, and one or the other was sampled once every 32.76 sec. The magnetometer signals were digitized by measuring the number of cycles from a 100-kHz reference quartz oscillator that occurred during 512 cycles of the proton precession signal. The measured scalar total field values, along with time signals, were stored in a memory device that could hold up to 800 min of data. The data were then read out as the spacecraft flew over the receiving stations. The experiment performed satisfactorily, and the reported accuracy of the data is within 2 gammas.

Alternate Names

  • Cosmos26/ProtonPrecessionalMagnetometers

Facts in Brief

Mass: 10 kg
Power (avg): 2.4 W

Funding Agency

  • Izmiran (U.S.S.R)


    Additional Information

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



    NameRoleOriginal AffiliationE-mail
    Mr. V. I. NalivaykoOther InvestigatorIZMIRAN
    Mr. Sh. S. DolginovPrincipal InvestigatorIZMIRAN
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