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Abstract - Lasers, satellites, precise timing, navigation, reference frames and terrestrial gravity measurement. Find out what they all have in common at a small facility near Eastbourne. You might not have heard of us, but you will likely be using a product of the Space Geodesy Facility (SGF), Herstmonceux, albeit indirectly.

Satellites observe the Earth on a global level taking measurements to help improve our understanding of the dynamic processes at work on our planet. Natural disasters, mass transport, ice sheet melting, ocean currents, climate change, the Earth's orientation in space and its varying gravity field are all studied using data gained from satellite technology. Monitoring these satellites, and providing precise orbit determination, laser tracking stations around the world underpin this vital Earth observation research. Behind the accuracy and precision of the tracking stations lies a world of precision timing, short pulse lasers, coordinates and reference frames. In addition, the precise measurement of the acceleration due to gravity at the station provides complimentary, non-space-based, research to be carried out, both looking at planetary processes and providing a unique UK testing ground for quantum technologies.

In this talk the two geodetic techniques of satellite laser ranging and gravimetry will be introduced. Their complexities, technical aspects and some fundamental products derived from their measurements presented.

Bio - Victoria is СÀ¶ÊÓƵ Alumni starting her career at СÀ¶ÊÓƵ attaining a BSc (Physics with Astrophysics) and an MPhil (Engineering). She later gained her PhD at University College London whilst working at the Space Geodesy Facility where she has worked for 22 years. Her interests whilst at the SGF have moved from laser and optical work to now concentrate on research and products of gravity data. 

Posted on behalf of: Department of Physics and Astronomy
Last updated: Tuesday, 22 October 2024