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Master File, All Detectors

NSSDCA ID: SPMS-00023

Availability: Archived at NSSDC, accessible from elsewhere

Time span: 1961-06-30 to 1962-08-31

Description

This data set contains merged data from all six experiments on Injun 1. A 7th experiment was actually on the attached spacecraft GREB 3 (or SOLRAD 3) which did not separate as planned from INJUN. As a result, the intended magnetic alignment was not realized, and the combined spacecraft had a complex spin-and-tumble motion with an ill-defined and variable period of several minutes. Each detector was sampled at least once per second. Five of the six experiments operated throughout the approximately 18-month lifetime of the satellite; the Solid-State Proton Detectors worked well until July 9, 1962, after which Starfish electrons contaminated the data. Although the Auroral and Airglow Photometer operated nominally, the un-separated GREB 3 satellite completely filled its field of view. Consequently, no useful auroral or airglow data were obtained. This data set is written in character mode, originally in BCD, converted to EBCDIC by NSSDC. The data are blocked, with 10 logical records (204 characters per logical record) per physical record.

The GM Detector data are the counts from the Anton type 213 directional GM counter, which was sensitive to electrons (E>40 keV), and protons (E>0.5 MeV). The detector was also sensitive to solar X-rays in the 2 to 12 Angstrom range, but these data are excluded from this data set. The soft X-ray observations were made at sporadic intervals from June 29, 1961, through August 12, 1962 (about 74 min of data), as the instrument field of view included the sun; those data are presented separately as data set SPMS-00570.

The Cadmium Sulfide Detector parameters are the counts from the CdS detectors at 90 and 180 degrees to the satellite symmetry axis, sensitive to electrons 200 eV - 500 KeV and protons 1 KeV - 10 MeV, plus another identical pair that had an added broom magnet to sweep out electrons of energy less than 500 KeV, plus an optical monitor with a transparent quartz window that served as a light and X-ray detector.

The Electron Differential Energy Spectrometer data are counts from two Anton type 213 directional GM counters sensing electrons in two channels with energies 40 - 50 KeV and 90 - 100 KeV, plus counts from a monitor of penetrating X-rays and energetic protons. The detector fields of view were directed 90 degrees to the spacecraft symmetry axis.

The Fluxgate Magnetometer data are from the single-axis fluxgate that was intended to check the magnetic field alignment of Injun 1 and to determine the look directions of the various detectors. The magnetometer, with a range of 0 - 5.E-5 T, was pointed in a direction normal to the magnetic field vector.

The Solid_State Proton Detector data are from a pair of detectors (energy ranges 1.4 - 17 MeV and 1.6 - 11 MeV) looking perpendicular to and anti-parallel to the spacecraft symmetry axis. The detectors worked well until July 9, 1962, after which Starfish electrons contaminated the data. Loss of the intended magnetic alignment rendered the data useless for detailed pitch angle studies.

Additional parameters included are time, local time, spacecraft position, B, L, I, B/B0, Kp3, daily sum of Kp3, internal temperatures, voltage, and calibration counts.

Data are available online at ftp://cdaweb.gsfc.nasa.gov/pub/data/

Alternate Names

    Discipline

    • Space Physics: Magnetospheric Studies

    Old NSSDCA IDs

    • 61-015B-01B
    • 61-015B-02A
    • 61-015B-03A
    • 61-015B-04A
    • 61-015B-05A
    • 61-015B-06A

    Additional Information

    Spacecraft

    Experiments

    Questions and comments about this data collection can be directed to: Dr. H. Kent Hills

     

    Personnel

    NameRoleOriginal AffiliationE-mail
    Mr. Robert M. CandeyGeneral ContactNASA Goddard Space Flight Centerrobert.m.candey@nasa.gov

    Selected References

    • Spacecraft parameters and calibrations for Injun 1 (61-015B), Unpublished, Unnumbered, Jan. 1971.
    • Detector calibration curves for the GM counter experiments (61-015B-01) on Injun 1, Unpublished, Unnumbered, Jan. 1971.
    • Magnetic tape data format for all Injun 1 (61-015B) experiments, NASA-GSFC, NSSDC, Unnumbered, Jan. 1971.
    • Brecht, J. J., Injun 1 (61-015B), spacecraft section (NSSDC information packet), NASA-GSFC, NSSDC, Unnumbered, Greenbelt, MD, Jan. 1971.
    • Brecht, J. J., Injun 1 (61-015B-01B), NASA-GSFC, NSSDC, Unnumbered, Greenbelt, MD, Jan. 1971.
    • Brecht, J. J., Injun 1 (61-015B-01), NASA-GSFC, NSSDC, Unnumbered, Greenbelt, MD, Jan. 1971.
    • Brecht, J. J., Injun 1 (61-015B-03A), data set section (NSSDC information packet), NASA-GSFC, NSSDC, Unnumbered, Greenbelt, MD, Jan. 1971.
    • Brecht, J. J., Injun 1 (61-015B-03), experiment section (NSSDC information packet), NASA-GSFC, NSSDC, Unnumbered, Greenbelt, MD, Jan. 1971.
    • Brecht, J. J., Injun 1 (61-015B-02A), data set section (NSSDC information packet), NASA-GSFC, NSSDC, Unnumbered, Greenbelt, MD, Jan. 1971.
    • Brecht, J. J., Injun 1 (61-015B-02), experiment section (NSSDC information packet), NASA-GSFC, NSSDC, Unnumbered, Greenbelt, MD, Jan. 1971.
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