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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 46, Iss. 8 — Aug. 1, 1956
  • pp: 578–583

Automatic Auroral Recorder

D. M. HUNTEN  »View Author Affiliations

JOSA, Vol. 46, Issue 8, pp. 578-583 (1956)

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A description is given of a device which automatically sweeps the meridian once each five minutes and records the intensity of the auroral green line (5577 A) in each 10° step. It is almost completely insensitive to white light, but produces a warning signal if the white light becomes very bright. The response is roughly logarithmic over a range of 10 000 to 1 in intensity. The intensities are recorded directly and also in digital form. For the latter, five steps of intensity are distinguished and punched in paper tape; each step corresponds to a factor of 10 and the scale agrees fairly closely with the accepted International Brightness Coefficients.

D. M. HUNTEN, "Automatic Auroral Recorder," J. Opt. Soc. Am. 46, 578-583 (1956)

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  1. W. D. Penn and B. W. Currie, Can. J. Research A27, 45 (1949).
  2. H. E. Cronin and C. L. Noelcke, Final Report, March 1955, U. S. Air Force Contract AF19(604)-640, Geo-Science, Inc., Washington Grove, Maryland (unpublished).
  3. See, for example, R. E. Bell and R. L. Graham, Rev. Sci. Instr. 23, 301 (1952).
  4. D. M. Hunten, Can. J. Phys. 31, 681 (1953).
  5. G. G. Shepherd, Scientific Report No. AR-16, October, 1954, U. S. Air Force Contract AF19(122)-152, University of Saskatchewan (unpublished).
  6. M. J. Seaton, J. Atm. and Terrest. Phys. 4, 285 (1954).
  7. D. M. Hunten, J. Atm. and Terrest, Phys. 7, 141 (1955)

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