Unique long-term visibility variations are detected when the quiet Sun is observed with interferometers operating at 8 mm and 11 cm wavelength with angular resolutions of -0.5'. Quasiperiodic fluctuations in fringe amplitude are observed with periods between 20 and 30 rain, and with amplitude nulls
The radio radius of the Sun at millimeter and centimeter wavelengths
β Scribed by Paul N. Swanson
- Publisher
- Springer
- Year
- 1973
- Tongue
- English
- Weight
- 159 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0038-0938
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β¦ Synopsis
The radio radius of the Sun is determined from an analysis of the radio contact times of the 7 March, 1970 and 10 July, 1972 solar eclipses from 2 = 3 mm to 2 = 31 cm. Agreement with other eclipse measurements is good. A best fit curve through the several points gives the radio radius to within approximately β’ 0.01 of the photosheric radius below 2-~ 5 cm.
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