Ralf Schmid

Papers

Total Citations

602

H-Index

About

Ralf Schmid is a leading figure in geodesy and satellite navigation, renowned for his foundational work on antenna phase center corrections for Global Navigation Satellite Systems (GNSS). His research focuses on improving the accuracy of positioning, timing, and reference frame realization by refining the models that describe how GNSS antennas—both on satellites and on the ground—receive and transmit signals. Schmid’s most impactful contribution is his 2007 paper on generating a consistent absolute phase-center correction model for GPS receiver and satellite antennas, which has amassed over 470 citations and serves as a cornerstone for modern GNSS data processing. He further advanced the field by leading the development of the IGS14 reference frame and its associated antenna calibration file (igs14.atx), a critical update adopted by the International GNSS Service (IGS) in 2016. His work on extending satellite antenna patterns to larger nadir angles and improving models for GLONASS has enhanced global geodetic accuracy, directly supporting applications from tectonic plate monitoring to precise navigation. Schmid’s contributions are central to the IGS’s operational standards, making him a key architect of the high-precision infrastructure that underpins modern Earth science.