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Remarks on the Restoration of Occultation Observations

Published online by Cambridge University Press:  30 March 2016

Terence J. Deeming
Terence J. Deeming *
Affiliation:
Dept. of Astronomy, University of Texas, Austin, Texas 78712, U.S.A.

Extract

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If the limb of the Moon can be regarded as a straight edge, then the diffraction pattern of a point source which it produces at the distance of the Earth is the well known Fresnel diffraction pattern. Observations of stellar occultations reveal the variation of intensity with time as the diffraction pattern passes across the detector due to the orbital motion of the Moon and the rotation of the Earth. The linear scale of the diffraction pattern in monochromatic light depends on both the wavelength of observation, λ, and on the distance of the Moon, D, so that the scale is proportional to (λD)1/2.

Type
III. Joint Discussions
Information
Highlights of Astronomy , Volume 2: Highlights of Astronomy. As presented at the XIVth General Assembly of the IAU, 1970 , 1971 , pp. 662 - 667
Copyright
Copyright © Reidel 1971

References

Bracewell, R. N. and Roberts, J. A.: 1954, Australian J. Phys. 7, 615.CrossRefGoogle Scholar
Evans, D. S.: 1970, Joint Discussion on Occultations, XIV IAU, Brighton.Google Scholar
Khrishnan, T.: 1970, NASA Technical note D-5679.Google Scholar
Nather, R. E. and Evans, D. S.: 1970, Astron. J. 75, 575.Google Scholar
Scheuer, P.A.G.: 1962, Australian J. Phys. 15, 333.CrossRefGoogle Scholar