In Memoriam: Von R. Eshleman (1924-2017)

Von R. Eshleman died peacefully in late September, five days after his 93rd birthday. Although he began his career in radar astronomy, he is best known as a pioneer in the use of spacecraft radio signals for precise measurements in planetary exploration — specifically, the radio occultation method for profiling planetary atmospheres and ionospheres, which has now been “brought home” for monitoring Earth’s atmosphere using GPS satellites. He was involved in early Mariner missions to Mars and Venus, and he was the leader of the Radio Science Team on Voyager through the Jupiter encounters. In later years he worked on ring dynamics, gravitational focusing of electromagnetic waves, and anomalous retro-reflection from icy surfaces. A longer obituary may be found at