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H.T. Person Homecoming Lectures 2005

College of Engineering and Applied Science

Joseph A. Anselmi

H. T. Person Lecture 2005

GPS: How does it work?

Joseph A. Anselmi
Mechanical Engineer
Aerospace Corporation

Joseph A. Anselmi, a UW Mechanical Engineering alumni, is a Senior Engineering Specialist in the Guidance and Control Subdivision, Vehicle Systems Division of Aerospace Corporation. He will discuss the major components that make up the Global Positioning System (GPS), the spacecraft's subsystems, how spacecraft are launched and deployed and all the effort that goes into sustaining the constellation that provides three-dimensional, 24/7 worldwide coverage.

Mr. Anselmi has supported GPS for 28 years including the first launch on Feb. 14, 1978 and all subsequent launches, now totaling 51. He heads the spacecraft guidance and control effort and leads a team that has developed three hardware-in-the-loop, real time simulations. These simulations have been used to validate the contractor<92>s flight code based control laws, support launches, on-orbit anomalies and workarounds, and help train launch support teams. The Aerospace Corporation runs a federally funded research and development center whose primary customers are the United States Air Force and the National Reconnaissance Office. One of the major programs that Aerospace helped develop and sustains is the Global Positioning System.

Anselmi was recently awarded Aerospace Corporation<92>s highest honor, the Trustees<92> Distinguished Achievement Award for his contributions to the GPS attitude control system<92>s development and operation.

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