Clayne M. Yeates, 55, died April 18, 1991 in Huntington Memorial Hospital.

He was born in Logan, Utah on February 1, 1936, the son of Richard Owen Yeates and Evalyn Monson Yeates. Educated in the Logan City schools, he graduated from Logan High School in 1954 where he participated in sports and music. He attended Massachusetts Institute of Technology and Utah State University, graduating with a degree of Physics in 1961. He was a member of Sigma Chi Fraternity. He received his PhD in Physics from Brigham young University in 1966.Clayne married Karen Mathews in the Logan LDS Temple on September 14, 1959; they were later divorced. He married Laurie Dore on November 26, 1988 in Redlands, California.

Clayne was an accomplished violinist, sang with the MIT Logarythms, and sang duets with his sister Carole. He enjoyed fishing, golfing, skiing, and mountain climbing. He was an excellent chess player, winning the Utah State championship.

A High Priest in the LDS Church, Clayne fulfilled a mission to Sweden from 1956 to 1959. He served in the Bishopric of the Verdugo Hills 1st Ward.

Dr. Yeates joined the staff of Jet Propulsion Laboratory in 1968 after completing his Doctorate Degree in Plasma Physics at BYU.

Dr. Yeates was the Assistant Project Scientist for the JPL Mariner Venus-Mercury Project (1970 to 1974).

When the Galileo Project Office was formed in 1977, Dr. Yeates was appointed Science Manager. Throughout the Project Galileo development, launch, and fight operations up to the time of his death, he was responsible for all aspects of the Galileo science investigations. This included coordinating the efforts and controlling the resources of over 100 scientists in six countries. He served as the Chairman of the Science Requirements and Operations Planning Group. Under his leadership this group produced such an outstanding specification of the science requirements for the spacecraft design and the mission operations that is now used as the model for all future planetary missions.

In 1985 he was promoted to the position of Deputy Science and Mission Design Manager while retaining all of his previous responsibilities as Science Manager. he has been the Science and Mission Manager since 1989. Through his career, he was an active, respected scientist in his own right and served in several prestigious appointments, As but one example, in the late 1980's he performed enlightened, pioneering work in the telescopic observations associated with Dr. Frank's theory of water transport to Earth by cometesimals.

Clayne Yeates insight and leadership have made major contributions to the exploration of the Solar System. He authored many papers and articles. He is the senior author of the definitive book documenting Project Galileo and its planned exploration of Jupiter. He was an inspiration to the Galileo Team. Not just a great colleague, but also a dear friend of tremendous warmth and compassion. he will be greatly missed. Clayne Yeates was the most influential person in the selection of the Galileo spacecraft arrival date at Jupiter as December 8, 1995. Clayne will be especially missed on that day, but with his colleagues in spirit and very much in their hearts.

On May 9, 1991, Clayne Yeates will receive (posthumously) NASA's second most prestigious award, the Outstanding Leadership Medal, for his work on Galileo. He truly was a leader.

Dr. Yeates is survived by his wife, Laurie and five children, Matthew (Bee), Todd (Melissa), Jennifer (Jeff) Conte, Brittany, and Taylor; and four grandchildren. He is also survived by his mother, Evalyn Yeates of Logan; and three brothers, Owen, Redlands, Calif.; Lynn, and Dennis, both of Murray; two sisters, Carole Maddux, Torrrence, Calif.; and Sheryl Spriet, Smithfield; also by many friends and scientific colleagues throughout the world.

Funeral services will be held Tuesday, April 23, at 11:00 a.m. at the Church of Jesus Christ of Latter-day Saints, 1130 E. Wilson Avenue, Glendale. Burial services will be private.

The family requests that in lieu of flowers, donations be made to the American Diabetes Association, 643 East 400 South SLC, Ut 84102.

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