INTERNATIONAL HYDROGRAPHIC REVIEW
MAY 2020
82
els and GNSS-based height determination. E-mail: joachim.schwabe@bkg.bund.de
Jonas Agren is associate professor in geodesy and senior lecturer at the University of Gävle in
Sweden. He is also part time senior geodesist at Lantmäteriet, the Swedish mapping, cadastral
and land registration authority. He received his PhD degree in physical geodesy at the Royal Institute
of Technology in Stockholm (KTH) in 2004. Since then he has worked with geoid modelling,
height systems and gravimetry in Sweden and the Nordic/Baltic countries. He was the chairman
of the working group on geoid and height systems of the Nordic Geodetic Commission (NKG) between
2010 and 2018, and leader of FAMOS activity 2 (Harmonising vertical datum/improving
vessel navigation for the future) between 2015 and 2018.E-mail: jonas.agren@hig.se
Gunter Liebsch is head of the unit “Integrated Spatial Referencing” at the German Federal
Agency for Cartography and Geodesy (BKG), dealing with the German and the European height
systems, GREF (GNSS reference station network in Germany) and the national quasigeoid model
GCG. He graduated as a geodesist from the Technische Universität Dresden (TUD) in 1990 and
finalized his PhD thesis on the processing and use of water level time series for geodetic and geodynamic
applications in the Baltic Sea in 1997.E-mail: gunter.liebsch@bkg.bund.de
Patrick Westfeld is head of German Hydrographic Office's R&D section “Geodetichydrographic
Techniques and Systems” at the Federal Maritime and Hydrographic Agency (BSH).
His activities range from conceptual issues pertaining to hydroacoustic and imaging sensor technologies,
sensor integration and modeling, algorithmic development and software implementation
up to and including application-specific implementation and practical transfer in the production environment.
After graduating as a geodesist from the Technische Universität Dresden (TUD) in
2005, he conducted research in the fields of photogrammetry and laserscanning and finalized his
PhD degree in 2012 on geometric-stochastic modeling and motion analysis.
E-mail: patrick.westfeld@bsh.de
Thomas Hammarklint is the Chairman of the BSHC Chart Datum Working Group and works at
the Swedish Maritime Administration (SMA). He graduated as a physical oceanographer from the
Gothenburg University in 2002. He is the Swedish representative and expert in several working
groups and programs related to water levels, data exchange and reference levels, such as IOC
Global Sea Level Observing System (GLOSS), IHO Tidal Water Level and Current Working
Group (TWCWG), NSHC Tidal Working Group (TWG) and Baltic Sea Operational Oceanographic
System (BOOS). E-mail: thomas.hammarklint@sjofartsverket.se
Jyrki Mononen is an expert at the Finnish Transport and Communications Agency Traficom in
the Hydrographic Survey Services. He is the ordinary secretary of the BSHC Chart Datum
Working Group. He graduated as MSc in land surveying an the Helsinki University of Technology
in 1995. He has been involved in chart datum definitions in Finnish nautical charts and
navigational information, national specifications for hydrographic surveying and procurement of
hydrographic surveys. He is Finnish representative in IHO Tides, Water Level and Currents
Working Group and Data Quality Working Group. E-e-mail: jyrki.mononen@traficom.fi
Ole B. Andersen is professor in marine geodesy and head of the hydrosphere group at DTU
Space at the Technical University of Denmark which is the national space institute of Denmark.
His activity in the working group has been to provide satellite-based long-term estimates of mean
