Astrodynamical Missions, Gravitomagnetism and Reference Frames

16 Jun 2023, 09:00
40m
Room "Galileo Galilei"

Room "Galileo Galilei"

Physics Department Building C
Oral Fundamental Physics tests: Gravity, Lorentz violation, general relativity, cosmology etc. Space Applications

Speaker

Wei-Tou Ni (National Tsing Hua University, Taiwan)

Description

Frame dragging is a crucial aspect of relativistic gravity and a manifestation of gravitomagnetism. After Lense-Thirring papers, over 100 years of theoretical investigation and experimental endeavor have established the precision in the astrodynamical measurement up to 1 % level by Gravity Probe B and LAGEOS-LARES mission. Planned/Proposed astrodynamical missions will measure and separate the
gravitomagnetic effects from their other goals. This will further improve the precision of measuring gravitomagnetic effects experimentally. Ongoing large-scale rotation experiments on earth and underground are reaching the sensitivity of measuring
gravitomagnetic effect. These developments will lead to establishing an ultra-precise reference frame based on Earth and the solar system. It will be useful for fundamental astronomy and space navigation.

Primary author

Wei-Tou Ni (National Tsing Hua University, Taiwan)

Presentation materials