Ratio of the temperatures of the quiet Sun and the centre of the new moon at λ = 1.3 mm

As radio wave spectral line observations are made at ever shorter wavelengths, the need for precise calibration increases. This is because, as a larger portion of the frequency spectrum becomes available for observation, an increasing number of multiple molecular transistions will be detected. To ob...

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Bibliographic Details
Published in:Nature (London) 1974-01, Vol.250 (5464), p.314-314
Main Authors: WRIXON, G. T., SCHNEIDER, M. V.
Format: Article
Language:English
Subjects:
Humanities and Social Sciences
letter
multidisciplinary
Science
Science (multidisciplinary)
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Summary:As radio wave spectral line observations are made at ever shorter wavelengths, the need for precise calibration increases. This is because, as a larger portion of the frequency spectrum becomes available for observation, an increasing number of multiple molecular transistions will be detected. To obtain reliable excitation parameters from these detections they must be calibrated accurately at each frequency. Linsky 1 has proposed the Moon as a radiometric standard for observations of extended sources in the infrared, millimetre and microwave portions of the spectrum. We therefore measured the ratio of the quiet Sun temperature to that of the centre of the new Moon at 231 GHz(λ = 1.3mm).
ISSN:0028-0836
1476-4687
DOI:10.1038/250314a0