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GR: Fachverband Gravitation und Relativitätstheorie
GR 14: Experimental Tests
GR 14.1: Vortrag
Donnerstag, 3. März 2016, 16:45–17:05, VMP6 HS C
Precision test of General Relativity with Galileo navigation satellites — •Daniela Kunst, Sven Herrmann, Felix Finke, Meike List, Benny Rievers, and Dirk Pützfeld — Center of Applied Space Technology and Microgravity (ZARM), University Bremen, Bremen, Germany
Einstein’s theory of general relativity leads to various predictions that have already been verified by experiments, such as the perihelion shift of Mercury or the gravitational redshift. The best measurement of the gravitational redshift up to today has been achieved with the Gravity Probe A experiment in 1976 with an uncertainty of 1.4 · 10−4. Today, two of the Galileo navigation satellites provide us with an excellent opportunity to improve this uncertainty. GSAT0201 and GSAT0202 have accidentally been injected onto an eccentric orbit, so that the onboard accurate, stable atomic clocks experience a daily modulation of the gravitational potential resulting in a measurable dilation of time. Using the data obtained by the satellites and a sophisticated model for the influence of solar radiation pressure on the satellites we aim to analyse the data and determine this time dilation to high accuracy and therewith improve previous results.
This project is supported by the German Space Agency DLR with funds provided by the Federal Ministry of Economics and Technology (BMWi) under grant number DLR 50 WM 1548.