Pascale Defraigne

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About

Pascale Defraigne is a leading figure in geodesy and time-frequency metrology, whose work bridges the precision of satellite positioning with the intricacies of Earth’s rotation and atomic timekeeping. Her research focuses on the use of Global Navigation Satellite Systems (GNSS) for high-accuracy geodetic positioning, particularly through the analysis of receiver antenna calibration models. In her influential 2013 paper, "Influence of different GPS receiver antenna calibration models on geodetic positioning" (38 citations), Defraigne demonstrated how subtle variations in antenna phase center corrections can significantly impact the accuracy of coordinate estimates, a critical insight for applications ranging from crustal deformation monitoring to reference frame realization. Beyond this, she has made foundational contributions to the study of Earth orientation parameters and the integration of GNSS with time transfer techniques, enabling sub-nanosecond synchronization essential for global networks. Her work has shaped best practices in the geodetic community, and she is widely recognized for her role in advancing the consistency and reliability of space-geodetic measurements.