Occultation of a compact radio source by Venus

Details Occultation of a compact radio source by Venus Occultation of a compact radio source by Venus

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aj....104..880l&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 104, no. 2, Aug. 1992, p. 880-890.

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Radio Occultation, Radio Sources (Astronomy), Venus (Planet), Very Long Base Interferometry, Computational Astrophysics, Light Curve, Planetary Ionospheres, Solar Wind

Scientific paper

The position of Venus in the radio reference frame was measured on the basis of an observation of an occultation of the compact radio source P0507 + 17 by Venus on July 19, 1988. By comparing model light curves to the observed light curves for both ingress and egress, the frame-tie offsets Delta(lambda) and Delta(beta) (ecliptic longitude and latitude) were determined. The solution for both Delta(lambda) and Delta(beta) gave results consistent with zero offsets, but with an error of about 0.2 arcsec. The egress light curve alone yielded higher accuracy for a linear combination of Delta(lambda) and Delta(beta): Delta(lambda) + 0.51 Delta(beta) = 0.026 +/-0.04 arcsec.

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