Abstract

Since January 1961the Lockheed Solar Observatory has supplemented its H-α flare patrol heliograms with an observing technique which probes somewhat deeper into the chromosphere. Partial rotation of the end polarizers of the Hallé filter allows a shift of the band pass center to ±0.5 angstroms from the H-α center. The shift can be toward either the red or the blue depending on the direction of rotational displacement of the polarizers. Radiation from solar chromospheric material recorded on the heliograms with the filter in the off-band position consists of both Doppler shifted H-α emission and line-broadened emission. The technique for distinguishing between Doppler shifted and line-broadened radiation involves a three-wavelength sequential photographic recording followed by superposition and reproduction by a normal three-color printing process. Time lapse movies of the results illustrate the technique and show in color the three dimensional motions of chromospheric material.

© 1964 Optical Society of America

Chromospheric helium imaging photometer (an instrument for high time cadence 1083-nm wavelength solar observations)

David F. Elmore, Gregory L. Card, Clarke W. Chambellan, Donald M. Hassler, Howard L. Hull, Alice R. Lecinski, Robert M. MacQueen, Kim V. Streander, John L. Streete, and Oran R. White
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Observations of Near Infrared Radiation from the Solar Atmosphere

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Appl. Opt. 3(1) 125-129 (1964)

The McMath Solar Telescope of Kitt Peak National Observatory

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Appl. Opt. 3(12) 1337-1346 (1964)

Infrared Radiometric Observations of the Solar Corona During the Total Solar Eclipse of 20 July 1963

J. H. Taylor and R. M. MacQueen
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Spectrostratoscope: A Balloon-Borne Solar Observatory

K. O. Kiepenheuer and J. P. Mehltretter
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