Kenneth J. Johnston, Ph.D.
U.S. Naval Observatory
Dr. Kenneth Johnston is a native of New York City. He received a bachelor's degree in electrical engineering in 1964 from Manhattan College and a Ph.D. in Astronomy from Georgetown University in 1969. His thesis research was on narrow band optical photometry of eclipsing binary stars.As a student at Georgetown, he was a summer student at the Naval Research Laboratory (NRL), later a NAS/NRC Postdoctoral Associate at NRL in the Radio Astronomy Branch of the Astronomy and Atmospheric Physics Division from 1969 through 1971. His research program was directed at the physics of compact HII regions and star forming regions in the galaxy. Dr. Johnston formerly joined this branch in 1971 as a radio astronomer. During this time he accomplished research on interstellar masers and extragalactic nuclei using Very Long Baseline Interferometry (VLBI). He also advanced the field of radio astrometry using the Green Bank interferometer in Green Bank, WV.
In 1980, Dr. Johnston became the Branch Head of the Radio and IR Astronomy Branch at NRL. He developed a program that applied interferometric techniques for high resolution imaging at optical and radio wavelengths. Under his direction a pioneering effort was developed which is resulting in the first imaging optical interferometer, the Navy Prototype Optical Interferometer (NPOI) located at Flagstaff, AZ. Other achievements include the establishment of a global inertial reference frame at optical/radio wavelengths, development of radio techniques to probe the surface of asteroids, and the first images of interstellar masers.
Dr. Johnston in 1990 became the Chief Scientist and Director of the Center for Advanced Space Sensing and in 1992 the Superintendent of the Remote Sensing Division at NRL. During 1991 he was also the Superintendent of the Space Systems Technology Department of the Naval Center for Space Technology. Dr. Johnston has developed an extensive program in remote sensing of the middle and upper atmosphere.
In 1993, Dr. Johnston became the Scientific Director for the U.S. Naval Observatory. He is responsible for the scientific oversight of precise time, time interval and astrometry programs. He is at present developing the areas of radio and optical interferometry for astrometric and imaging applications with both ground and space instruments.