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Observations of the 7 March, 1970 total solar eclipse at wavelengths of 3.2 and 8.3 mm

✍ Scribed by John P. Hagen; Paul N. Swanson; Robert W. Haas; Fred L. Wefer; Raymond W. Vogt

Publisher
Springer
Year
1971
Tongue
English
Weight
992 KB
Volume
21
Category
Article
ISSN
0038-0938

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✦ Synopsis

The 7 March, 1970 total solar eclipse was observed at wavelengths of 3.2 and 8.3 mm; the object being to use the knife edge of the Moon as it passed across the Sun to improve angular resolution on the Sun. This in turn would provide a radial brightness distribution of the Sun with an angular resolution of a few seconds of arc.

Excellent eclipse curves were obtained at 3 ram; however, some external interference marred the 8 mm record near totality.

The 8 mm brightness distribution is subject to some uncertainty, but tends to show limb brightening. The 3 mm brightness distribution shows a well defined complex limb brightening within about 1 arc rain of the optical limb. The maximum brightening is approximately 30% above the average disc temperature.

B. PREVIOUS EXPERIMENTS

The first successful determination of the millimeter radial brightness distribution of

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