Chalmers Research: Jan Johansson

2023

Multi-Constellation/Multi-Frequency GNSS Signal Degradation Due to Foliage and Reflective Environments †

Uttama Dutta, Jan Johansson

Engineering Proceedings. Vol. 54 (1)

Journal article

2022

Ionospheric Effects on GNSS RTK

Uttama Dutta, Per O. J. Jarlemark, Carsten Rieck et al

35th International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS+ 2022. Vol. 3, p. 1557-1566

Paper in proceeding

2021

Galileo l10 satellites: Orbit, clock and signal-in-space performance analysis

Constantin Octavian Andrei, Sonja Lahtinen, Markku Poutanen et al

Sensors. Vol. 21 (5), p. 1-20

Journal article

2021

A GNSS velocity field for geophysical applications in Fennoscandia

Halfdan Pascal Kierulf, Holger Steffen, Valentina R. Barletta et al

Journal of Geodynamics. Vol. 146

Journal article

2020

Signal performance analysis of the latest quartet of Galileo satellites during the first operational year

Constantin Octavian Andrei, Jan Johansson, Hannu Koivula et al

2020 International Conference on Localization and GNSS, ICL-GNSS 2020 - Proceedings

Paper in proceeding

2019

Station calibration of the SWEPOS GNSS network

Martin Lidberg, Per O. J. Jarlemark, Jan Johansson et al

Geophysica. Vol. 54 (1), p. 93-105

Journal article

2018

Proceedings of the European Navigation Conference 2018 (ENC 2018): Abstracts and Technical Papers

Jan Johansson, Gunnar Elgered

Proceedings (editor)

2015

Contributions of Onsala Space Observatory to GGOS

Rüdiger Haas, Gunnar Elgered, Thomas Hobiger et al

Proceedings of the 22nd European VLBI Group for Geodesy and Astrometry Working Meeting, p. 125-129

Other conference contribution

2015

The MeteoMet project - metrology for meteorology: challenges and results

A. Merlone, G. Lopardo, F. Sanna et al

Meteorological Applications. Vol. 22, p. 820-829

Journal article

2015

First 230? GHz VLBI fringes on 3C 279 using the APEX Telescope (Research Note)

Jan Wagner, A. Roy, T.P. Krichbaum et al

Astronomy and Astrophysics. Vol. 581

Journal article

2014

GROUND- AND SATELLITE- BASED GNSS MEASUREMENTS OF WATER VAPOUR WITH FOCUS ON CLIMATE APPLICATIONS

Ragne Emardson, Per Jarlemark, Jan Johansson

Proceedings of Metrology for Meteorology and Climate 2014 conference

Other conference contribution

2014

GNSS för globala jordobservationer

Gunnar Elgered, Rüdiger Haas, Jan Johansson et al

Book

2013

GNSS for global Earth observation: an update from the European coordination action Gfg²

Gunnar Elgered, J Wickert, C Arras et al

7th Study Conference on BALTEX June 10–14, 2013, Borgholm, Island of Öland, Sweden

Conference poster

2013

A new challenge for meteorological measurements: The meteoMet project-Metrology for meteorology

A. Merlone, G. Lopardo, I. Antonsen et al

AIP Conference Proceedings. Vol. 1552 8, p. 1030-1035

Paper in proceeding

2013

GNSS for global environmental Earth observation

Gunnar Elgered, Rüdiger Haas, Jan Johansson et al

Book

2013

Evaluation of the atmospheric water vapor content in a regional climate model using ground-based GPS measurements

Tong Ning, Gunnar Elgered, Ulrika Willén et al

Journal of Geophysical Research. Vol. 118 (2), p. 329-339

Journal article

2012

GNSS for Global Earth Observation: The European coordination action Gfg²

J Wickert, C. Arras, M. Caparrini et al

Sixth FORMOSAT-3/COSMIC Data Users' Workshop 30 October - 1 November 2012, Boulder, Colorado U.S.A.

Conference poster

2012

VLBI at APEX: First Fringes

Alan Roy, Jan Wagner, Michael Wunderlich et al

Proceedings of Science. Vol. 2012-October

Paper in proceeding

2011

Monitoring coastal sea level using reflected GNSS signals

Johan Löfgren, Rüdiger Haas, Jan Johansson

Advances in Space Research. Vol. 47 (2), p. 213-220

Journal article

2011

The Impact of Microwave Absorber and Radome Geometries on Ground-Based GNSS Measurements of Coordinates and Atmospheric Water Vapour

Tong Ning, Jan Johansson, Gunnar Elgered

Advances in Space Research. Vol. 47 (2), p. 186-196

Journal article

2010

Fiber based one-way time transfer with enhanced accuracy

Sven-Christian Ebenhag, Per Olof E Hedekvist, Jan Johansson

24th European Frequency and Time Forum, EFTF 2010; Noordwijk; Netherlands; 13 April 2010 through 16 April 2010

Paper in proceeding

2010

Fennoscandian strain rates from BIFROST GPS: A gravitating, thick-plate approach

Hans-Georg Scherneck, Martin Lidberg, Rüdiger Haas et al

Journal of Geodynamics. Vol. 50 (1), p. 19-26

Journal article

2010

VLBI time-transfer using CONT08 data

Carsten Rieck, Rüdiger Haas, R. T. Kenneth Jaldehag et al

Proceedings of the 24th European Frequency and Time Forum ESA/ESTEC Noordwijk (NL) 13-16 April 2010

Other conference contribution

2010

High-rate local sea level monitoring with a GNSS-based tide gauge

Johan Löfgren, Rüdiger Haas, Jan Johansson

Proceedings of the 2010 IEEE International Geoscience and Remote Sensing Symposium, Proceedings DVD-ROM, p. 3616-3619

Other conference contribution

2010

VLBI and GPS-based Time-Transfer Using Cont08 Data

Carsten Rieck, Rüdiger Haas, R. T. Kenneth Jaldehag et al

Proceedings of the 6th IVS General Meeting, p. 365-369

Other conference contribution

2010

Evaluation of climate models using ground-based GNSS observations

Gunnar Elgered, Tong Ning, Jan Johansson et al

Proceedings of the 16th General Assembly of the Nordic Geodetic Commission, p. 107-114

Other conference contribution

2010

Ground-Based GPS for Validation of Climate Models: The Impact of Satellite Antenna Phase Center Variations

Per O. J. Jarlemark, Ragne Emardson, Jan Johansson et al

IEEE Transactions on Geoscience and Remote Sensing. Vol. 48 (10), p. 3847-3854

Journal article

2010

GPS L1 Reflections from Seawater Observed with the GNSS-Based Tide Gauge

Johan Löfgren, Rüdiger Haas, Jan Johansson

IGS Workshop and Vertical Rates Symposium, 28 June - 2 July 2010, Newcastle upon Tyne, England

Conference poster

2010

Recent results based on continuous GPS observations of the GIA process in Fennoscandia from BIFROST

Martin Lidberg, Jan Johansson, Hans-Georg Scherneck et al

Journal of Geodynamics. Vol. 50 (1), p. 8-18

Journal article

2009

Site Dependent Effects in GNSS-Observations - Reflections as Disturbances and/or Signals

Johan Löfgren, Rüdiger Haas, Jan Johansson et al

European Geosciences Union General Assembly 2009, Vienna, Austria, 19 – 24 April 2009

Conference poster

2009

High-Rate GNSS Techniques for the Detection of Large Seismic Displacements

Tong Ning, Jan Johansson, Hans-Georg Scherneck et al

the IEEE International Geoscience and Remote Sensing Symposium (IGARSS), p. V 359-362

Other conference contribution

2009

Sea Level Monitoring Using a GNSS-Based Tide Gauge

Johan Löfgren, Rüdiger Haas, Jan Johansson

2nd International Colloquium - Scientific and Fundamental Aspects of the Galileo Programme, 14 - 16 October 2009, Padua, Italy

Conference poster

2009

Measurement accuracy in Network-RTK

Ragne Emardson, P. Jarlemark, S. Bergstrand et al

Report

2009

Periodic station motion in Gothenburg observed with GPS - possibily related to hydrological phenomena?

Rüdiger Haas, Nattachet Tangdamrongsub, Hans-Georg Scherneck et al

Advances in Geosciences: Volume 13: Solid Earth (SE). Vol. 13 (Solid Earth), p. 181-192

Book chapter

2009

Crustal loading in vertical GPS time series in Fennoscandia

M. Nordman, J. Mäkinen, H. Virtanen et al

Journal of Geodynamics. Vol. 48 (3-5), p. 144-150

Journal article

2009

Simon Casey, Rüdiger Haas, Michael Lindqvist et al

Proceedings of the 8th International e-VLBI Workshop. 22-26 June 2009. Madrid, Spain

Paper in proceeding

2009

Sea Level Monitoring Using a GNSS-Based Tide Gauge

Johan Löfgren, Rüdiger Haas, Jan Johansson

2nd International Colloquium - Scientific and Fundamental Aspects of the Galileo Programme, 14 - 16 October 2009, Padua, Italy, Conference Proceedings

Other conference contribution

2009

Validation of climate models using European ground-based GNSS observations

Gunnar Elgered, Ragne Emardson, P. Jarlemark et al

Proc. of 2nd Colloquium Scientific and Fundamental Aspects of the Galileo Programme, European Space Agency, 15-19 October, 2009, Padua, Italy. Vol. CD ROM

Other conference contribution

2009

The impact of microwave absorber and radome geometries on geodetic measurements with ground-based GNSS antennas

Tong Ning, Gunnar Elgered, Jan Johansson

Proc. of 2nd Colloquium Scientific and Fundamental Aspects of the Galileo Programme, European Space Agency, 15-19 October, 2009, Padua, Italy. Vol. CD ROM

Paper in proceeding

2009

New Results Based on Reprocessing of 13 years Continuous GPS Observations of the Fennoscandia GIA Process from BIFROST

Martin Lidberg, Jan Johansson, Hans-Georg Scherneck et al

Observing our Chaging Earth, Proc. of the 2007 IAG General Assembly, Perugia Italy, July 2-13, Ed. M.G Sideris, Springer Verlag. Vol. 133, p. 557-568

Paper in proceeding

2008

The impact of the electromagnetic environment of the antenna on GPS

Tong Ning, Tobias Nilsson, Jan Johansson et al

2008.05

Conference poster

2008

Atmospheric Water Vapor Content Inferred From GPS Data and Compared to a Global NWP Model and a Regional Climate Model

Tong Ning, Tobias Nilsson, Jan Johansson et al

2008.10

Conference poster

2008

Time Transfer by Passive Listening Over a 10-Gb/s Optical Fiber

Ragne Emardson, Per Olof E Hedekvist, M. Nilsson et al

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT. Vol. 57 (11), p. 2495-2501

Journal article

2008

Geodetic reference frames in the presence of crustal deformations - with focus on Nordic conditions

Martin Lidberg, Jan Johansson, Hans-Georg Scherneck

Report on the symposium of the IAG sub commission for Europe (EUREF), Riga, June 14-17, 2006, eds. J.A. Torres, H. Hornik, EUREF publication no. 16, Mitteilungen des Bundesamtes für Kartographie und Geodäsie, Frankfurt am Main 2008. Vol. 40, p. 189-198

Other conference contribution

2008

New Results Based on Reprocessing of 13 years Continuous GPS Observations of the Fennoscandia GIA Process from BIFROST

Martin Lidberg, Jan Johansson, Hans-Georg Scherneck et al

International Association of Geodesy Symposia (Vol. 133), M.G. Sideris (ed.): Observing our Changing Earth, p. 557-568

Book chapter

2008

The impact of the electromagnetic environment of the antenna on GPS

Tong Ning, Jan Johansson, Gunnar Elgered

2008.04

Conference poster

2007

Time transfer using an asynchronous computer network: Results from three weeks of measurements

Sven-Christian Ebenhag, R. T. Kenneth Jaldehag, Per Olof E Hedekvist et al

European Frequency and Time Forum, 29/5 - 1/6, Geneva, CH

Paper in proceeding

2007

An improved and extended GPS-derived 3D velocity field of the glacial isostatic

Martin Lidberg, Jan Johansson, Hans-Georg Scherneck et al

Journal of Geodesy. Vol. 81 (3), p. 213-230

Journal article

2007

Estimating Climate Trends Using GPS

Tobias Nilsson, Gunnar Elgered, Jan Johansson et al

Proceedings of the Fifth Study Conference on BALTEX, Ed. H.J. Isemer, International BALTEX Secretariat, GKSS Research Center, Geesthacht, Germany (38), p. 15-16

Other conference contribution

2007

BIFROST: Noise properties of GPS time series

Sten Bergstrand, Hans-Georg Scherneck, Martin Lidberg et al

in "Dynamic Planet: Monitoring and Understanding a Dynamic Planet with Geodetic and Oceanographic Tools", IAG Symposium, Cairns, Australia, 22-26 August, 2005, Series: International Association of Geodesy Symposia , Vol. 130, Tregoning, Paul; Rizos, Chris (Eds.), Springer. Vol. 130, p. 123-130

Paper in proceeding

2006

Accurate time transfer utilizing the synchronization in an SDH-network

Per Olof E Hedekvist, Ragne Emardson, Mattias Nilsson et al

2006 Optical Fiber Communication Conference, and the 2006 National Fiber Optic Engineers Conference; Anaheim, CA; United States; 5 March 2006 through 10 March 2006

Paper in proceeding

2006

Time and Frequency Transfer in an Optical Fiber Network: First Results

Ragne Emardson, Per Olof E Hedekvist, R. T. Kenneth Jaldehag et al

Proc. of the 20th European Frequency and Time Forum, Braunschweig Germany, March 27 - 30

Paper in proceeding

2006

A new GPS derived velocity field of the postglacial adjustment in Fennoscandia, and its implications for the maintenance of the European geodetic reference frame

Martin Lidberg, Jan Johansson

In: Report of the Symposium of the IAG Sub commission for Europe (EUREF) held in Vienna, 1-4 June 2005, J.A. Torres and H. Hornik (eds.), Mitteilungen des Bundesamtes für Kartographie und Geodäsie, Band 38, EUREF Publication No. 15, Verlag des Bundesamtes für Kartographie und Geodäsie, Frankfurt am Main. (38 /15), p. 102-107

Other conference contribution

2005

Time and Frequency Transfer in an Asynchronous TCP/IP over SDH-network Utilizing Passive Listening

Ragne Emardson, Per Olof E Hedekvist, Mattias Nilsson et al

IEEE International Frequency Control Symposium and Precise Time and Time Interval (PTTI) Systems and Applications Meeting, Vancouver, B.C.

Paper in proceeding

2005

Ionospheric Corrections for Accurate Positioning in Real Time

Sten Bergstrand, Ragne Emardson, P.O. Jarlemark et al

in Proc. Radio Science and Communication (RVK), eds. O. Gustafsson, P. Löwenborg, Linköping, Sweden, June 14-16, 2005, p. 391-394

Other conference contribution

2005

The Influence of Vegetation and Multipath on GNSS Signals

Camilla Granström, Jan Johansson

in Proc. Radio Science and Communication (RVK), Linköping, Sweden, June 14-16, 2005, eds. O. Gustafsson, P. Löwenborg, p. 385-390

Other conference contribution

2005

Upper Mantle Viscosity from Continuous GPS Baselines in Fennoscandia

Sten Bergstrand, Hans-Georg Scherneck, G.A. Milne et al

Journal of Geodynamics. Vol. 39 (2), p. 91-109

Journal article

2005

Chalmers Contributions to TOUGH

Gunnar Elgered, Jan Johansson, Borys Stoew et al

Conference poster

2005

An Investigation of Water Vapor Trends in Europe

Rüdiger Haas, Camilla Granström, Jan Johansson

in Proc. of the 17'th Working Meeting on European VLBI for Geodesy and Astrometry, eds. M. Vennebusch, A. Nothnagel, p. 91-96

Other conference contribution

2004

Meteorological Applications of the Swedish Ground.-Based GPS Network

Gunnar Elgered, L. Gradinarsky, N. Gustafsson et al

"ESA Conference Proceedings on Atmospheric Remote Sensing Using Satellite Navigation Systems", Matera, October 2003, CD-ROM, p. 404-411

Paper in proceeding

2004

Ground-Based GPS Data in Operational Weather Forecasting, Final Report to the Swedish National Space Board, Contract Dnr 158/01

Gunnar Elgered, A. Frisk, N. Gustafsson et al

Report

2004

Continuous GPS measurements of postglacial adjustment in Fennoscandia: 2. Modeling results

G.A. Milne, J.X. Mitrovica, Hans-Georg Scherneck et al

Journal of Geophysical Research. Vol. 109 (B2)

Journal article

2003

Assessing Long Term Trends in the Atmospheric Water Vapor Content by Combining Data From VLBI, GPS, Radiosondes and Microwave Radiometry

Rüdiger Haas, Gunnar Elgered, Lubomir Gradinarsky et al

Proceedings of the 16th Working Meeting on European VLBI for Geodesy and Astrometry, edited by W. Schwegmann and V. Thorandt, Bundesamt für Kartographie und Geodäsie, Frankfurt/Leipzig, p. 279-288

Magazine article

2002

Continuous GPS measurements of postglacial adjustment in Fennoscandia - 1. Geodetic results

Jan Johansson, James L. Davis, Hans-Georg Scherneck et al

Journal of Geophysical Research. Vol. 107 (B8)

Journal article

2001

Space-Geodetic Constraints on Glacial Isostatic Adjustment in Fennoscandia

Glenn A. Milne, James L. Davis, Jerry X. Mitrovica et al

Science. Vol. 291 (23 March 2001), p. 2381-2385

Journal article

1997

Measuring regional atmospheric water vapor using the Swedish permanent GPS network

Gunnar Elgered, Jan Johansson, Bernt Rönnäng et al

Geophysical Research Letters. Vol. 24 (21), p. 2663-2666

Journal article

1992

A study of precise position measurements using space geodetic systems

Jan Johansson

Doctoral thesis