In Memoriam


  • Anonymous


Frank Lerch died in January 1999, at age 75. He had been a member (Geodesy) since 1976. Lerch began his career at Goddard in 1960 when NASA itself was in its infancy, and set Goddard on its current path for determining the gravity field models. As a mathematician, he was responsible for developing many of the numerical techniques that are now in common use to process satellite tracking data, combine satellite and surface gravity data, and solve for the gravity field. His career was centered on the development of the Goddard Earth Models (GEMs), Joint Gravity Models (JGMs—with the University of Texas, CNES, and JPL as partners), and he began the work toward achieving EGM96, GSFC's latest and continuing gravity modeling effort in collaboration with NIMA and the Ohio State University