Abstract
ON January 14, 1972, observations of the Sun were made at 3.71 and 11.1 cm, using the NRAO three-element interferometer in the 2.7−1.8−0.9 km configuration. At 3.71 and 11.1 cm the minimum fringe spacings are 2.8 and 8.5 arc s, respectively, and the corresponding primary half-power beam widths are 6 and 18 arc min. The existing system was desensitized by turning off the r-f parametric amplifiers. This resulted in a system noise temperature of about 1,200 K. Because these preliminary results represent only six hours of observing time, it was not possible to determine the source positions precisely.
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References
Vinokur, M., Ann. d'Astrophys., 28, 412 (1965).
Kundu, M. R., Ann. d'Astrophys., 22, 1 (1959).
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HOBBS, R., JORDAN, S. & WEBSTER, W. High Resolution Radio Observations of the Sun at 3.71 and 11.1 cm. Nature Physical Science 243, 48–50 (1973). https://doi.org/10.1038/physci243048a0
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DOI: https://doi.org/10.1038/physci243048a0
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