African VLBI Network Training Site


Invited Talk: Monday 13 May 2019 - Dr Roelf Botha


13 May 2019 16:30 - 17:30

Title: Geodesy at SARAO & Time Systems

Author: Dr Roelf Botha
              Geodesy Manager
              Space Geodesy Programme
              South African Radio Astronomy Observatory (SARAO)

Geodesy is the science involved with the measurement of positions and distances on the Earth, using a multitude of specialised techniques. An overview of Geodesy techniques and our Programme actvities will be given. If we consider the spatial aspects, time also comes into the equation. Some concepts of time systems will be presented.

More about the author:


Roelf Botha holds an M.Sc in Astrophysics from North-West University (formerly Potchefstroom University) and a PhD in Laser Physics from the University of Stellenbosch. He has been involved with the Space Geodesy Programme of the Hartebeesthoek Radio Astronomy Observatory (HartRAO) site since 2004 and is currently employed as Manager of Geodesy. His work is focused primarily on the development and implementation of research equipment and networks for the Geodesy programme and the subsequent management thereof. This includes Global Navigation Satellite System (GNSS) and Seismic networks, development of the Lunar Laser Ranging (LLR) system and driving the automation of data collection, processing and presentation. He has published on a range of topics in various journals.