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Observations of heavy energetic ions for upstream from comet Halley
On March 25, 1986, the ICE spacecraft came within 28 x 10/sup 6/ km of the nucleus of comet Halley. For several days around this time, bursts of heavy ions were observed by the ICE energetic ion experiment. These bursts were observed only during periods when the solar wind velocity was considerably higher than its nominal value. We examine the characteristics of these ions, in particular their anisotropies. Using the well known formulae for transformation of distributions from the solar wind frame of reference to the spacecraft frame, we examine the angular distributions expected from either protons, or heavy ions from the water group, and show that the measurements are consistent with heavy ions, and not with protons. We discuss other sources of heavy ions and conclude that the most likely source of these ions is comet Halley. 9 refs., 5 figs.
Date:
January 1, 1986
Creator:
Sanderson, T. R.; Wenzel, K. P.; Daly, P. W.; Cowley, S. W. H.; Hynds, R. J.; Richardson, I. G. et al.
System:
The UNT Digital Library
[Draft of article by John J. Herrrera, "My 17 Minutes with John F. Kennedy", Houston Chronicle - 1983-11-21]
Draft of an article by John J. Herrera published in the Houston Chronicle on November 21, 1983. The article, titled "My 17 Minutes with John F. Kennedy", recounts Kennedy's trip to Houston and the brief time Herrera was able to spend with him. It also describes how Herrera and his family heard the news of Kennedy's assassination the following day.
Date:
November 21, 1983
Creator:
Herrera, John J.
System:
The Portal to Texas History
Reflections on the Constitution
Article written by Barbara Jordan for The Houston Lawyer regarding
Date:
July 14, 1987
Creator:
Jordan, Barbara, 1936-1996
System:
The Portal to Texas History