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The brightness temperature of Venus and the absolute flux-density scale at 608 MHz.The disk temperature of Venus was measured at 608 MHz near the inferior conjunction of 1972, and a value of 498 plus or minus 33 K was obtained using a nominal CKL flux-density scale. The result is consistent with earlier measurements, but has a much smaller uncertainty. Our theoretical model prediction is larger by a factor of 1.21 plus or minus 0.09. This discrepancy has been noticed previously for frequencies below 1400 MHz, but was generally disregarded because of the large observational uncertainties. No way could be found to change the model to produce agreement without causing a conflict with well-established properties of Venus. Thus it is suggested that the flux-density scale may require an upward revision, at least near this frequency, in excess of what has previously been considered likely.
Document ID
19730053725
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Muhleman, D. O.
Berge, G. L.
Orton, G. S.
(Owens Valley Radio Observatory Pasadena, Calif., United States)
Date Acquired
August 7, 2013
Publication Date
August 1, 1973
Publication Information
Publication: Astrophysical Journal
Volume: 183
Subject Category
Space Sciences
Accession Number
73A38527
Funding Number(s)
CONTRACT_GRANT: NSF GP-30400X
CONTRACT_GRANT: N00014-67-A-0094-0019
CONTRACT_GRANT: NGR-05-002-114
Distribution Limits
Public
Copyright
Other

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