报告人：Jürgen Oberst(教授)

时间：2022.12.15 16:00-17:30

Zoom会议：872-320-77515

密码：见邮件或班级通知

报告人简介

Professor Jürgen Oberst received his Ph.D. from the University of Texas at Austin in 1989. He is Chair of Planetary Geodesy at the Technical University Berlin, involved in various camera- or Laser altimeter experiments on space missions, such as Lunar Reconnaissance Orbiter, Mars Express, BepiColombo, and JUICE. His interests include the modeling of the orbits, shape, rotation, and interior structures of planets and their satellites, asteroids and comets.

报告简介

Laser Altimeters are powerful tools for various applications in planetary geodesy and geophysics. Altimeters have been in operation on spacecraft orbiting Mars, Mercury, the Moon, and small asteroids, to accurately measure global shape of the target bodies and to provide detailed maps of surface morphology.  Laser Altimeters may also measure the tiny variations in rotational rate, and effects of tidal deformation, as well as seasonal snow depth, as has been demonstrated for the polar areas of Mars. When Laser topography is combined with gravity data, we may determine the planet’s crustal density and model vertical crustal structures. The community is looking forward to new data from Laser Altimeter experiments in the near future. The ESA/JAXA BepiColombo mission, currently on its way to Mercury, carries the Laser Altimeter BELA (BepiColombo Laser Altimeter) and is scheduled to arrive in December 2025. Also, we expect the launch of ESA’s JUICE (Jupiter Icy Moons Explorer), equipped with the onboard Laser Altimeter GALA (Ganymede Laser Altimeter).