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About

Rolf Dach is a leading figure in satellite geodesy, whose work has fundamentally shaped how we model antenna behavior for Global Navigation Satellite Systems (GNSS). His primary research focuses on precise orbit determination (POD) and the development of highly accurate antenna phase center models—critical for minimizing errors in positioning and reference frame realization. Dach’s most influential contribution is his pioneering work on phase center modeling for LEO GPS receiver antennas, published in 2009, which has garnered 171 citations and remains a cornerstone for high-precision orbit determination. He further advanced the field by improving antenna phase center models for GLONASS (38 citations) and extending GPS satellite antenna patterns beyond the standard 14° nadir angle, enabling more robust tracking geometry. In a notable 2020 study (41 citations), Dach tackled the challenge of GNSS scale determination by integrating calibrated receiver and Galileo satellite antenna patterns, directly addressing the scale definition of the International Terrestrial Reference Frame (ITRF). His work is essential for researchers and engineers working on reference frames, satellite navigation, and geodetic sensing, providing the foundational models that underpin millimeter-level accuracy in global geodetic networks.