R
Ralf Schmid
Researcher at Technische Universität München
Publications - 47
Citations - 2510
Ralf Schmid is an academic researcher from Technische Universität München. The author has contributed to research in topics: GNSS applications & Global Positioning System. The author has an hindex of 16, co-authored 47 publications receiving 2059 citations. Previous affiliations of Ralf Schmid include University of Leicester & Deutsches Geodätisches Forschungsinstitut.
Papers
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Journal ArticleDOI
The Multi-GNSS Experiment (MGEX) of the International GNSS Service (IGS) - Achievements, prospects and challenges
Oliver Montenbruck,Peter Steigenberger,Lars Prange,Zhiguo Deng,Qile Zhao,Felix Perosanz,Ignacio Romero,Carey Noll,Andrea Stürze,Georg Weber,Ralf Schmid,Ken MacLeod,Stefan Schaer +12 more
TL;DR: The status and tracking capabilities of the IGS monitoring station network are presented and the multi-GNSS products derived from this resource are discussed and the achieved performance is assessed and related to the current level of space segment and user equipment characterization.
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Generation of a consistent absolute phase-center correction model for GPS receiver and satellite antennas
TL;DR: The development and numerical values of the new absolute phase-center correction model for GPS receiver and satellite antennas, as adopted by the International GNSS (global navigation satellite systems) Service, are presented and the benefits from switching from relative to absolute antenna phase- center corrections are demonstrated.
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IGS08: the IGS realization of ITRF2008
TL;DR: Because the heterogeneous distribution of the IGS08 network makes it sub-optimal for the alignment of global frames, a smaller well-distributed sub-network was additionally designed and designated as the I GS08 core network.
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GNSS Satellite Geometry and Attitude Models
Oliver Montenbruck,Ralf Schmid,Flavien Mercier,Peter Steigenberger,Carey Noll,Roman Fatkulin,Satoshi Kogure,Aiylam S. Ganeshan +7 more
TL;DR: To facilitate the joint analysis of GNSS observations and satellite laser ranging measurements, laser retroreflector array coordinates consistent with the IGS-specific spacecraft frame conventions are provided in addition to representative antenna offset values for all GNSS constellations.
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Absolute IGS antenna phase center model igs08.atx: status and potential improvements
Ralf Schmid,Ralf Schmid,Rolf Dach,Xavier Collilieux,Adrian Jäggi,Martin Schmitz,Florian Dilssner +6 more
TL;DR: With the new phase center model, orbit discontinuities at day boundaries can be reduced, and the consistency between GPS and GLONASS results is improved.