Jan Johansson

Adj professor vid Chalmers, Rymd-, geo- och miljövetenskap, Onsala rymdobservatorium

Visar 61 publikationer

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
Artikel i vetenskaplig tidskrift
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
Artikel i vetenskaplig tidskrift
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
Konferensbidrag (offentliggjort, men ej förlagsutgivet)
2014

GNSS för globala jordobservationer

Gunnar Elgered, Rüdiger Haas, Jan Johansson et al
Bok
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
Konferensbidrag (offentliggjort, men ej förlagsutgivet)
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
Artikel i vetenskaplig tidskrift
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 i proceeding
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
Poster (konferens)
2013

Spatial variability in the ionosphere measured with GNSS networks

T. Ragne Emardson, Per O. J. Jarlemark, Jan Johansson et al
Radio Science. Vol. 48 (5), p. 646-652
Artikel i vetenskaplig tidskrift
2013

VLBI at APEX: First Fringes

Alan Roy, Jan Wagner, Michael Wunderlich et al
Proceedings of Science, 11th European VLBI Network Symposium & Users Meeting,, p. 1-6
Konferensbidrag (offentliggjort, men ej förlagsutgivet)
2013

GNSS for global environmental Earth observation

Gunnar Elgered, Rüdiger Haas, Jan Johansson et al
Bok
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.
Poster (konferens)
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
Artikel i vetenskaplig tidskrift
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
Artikel i vetenskaplig tidskrift
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
Konferensbidrag (offentliggjort, men ej förlagsutgivet)
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
Konferensbidrag (offentliggjort, men ej förlagsutgivet)
2010

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

Per O. J. Jarlemark, T. Ragne Emardson, Jan Johansson et al
IEEE Transactions on Geoscience and Remote Sensing. Vol. 48 (10), p. 3847-3854
Artikel i vetenskaplig tidskrift
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
Konferensbidrag (offentliggjort, men ej förlagsutgivet)
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 i proceeding
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
Konferensbidrag (offentliggjort, men ej förlagsutgivet)
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
Artikel i vetenskaplig tidskrift
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
Artikel i vetenskaplig tidskrift
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
Poster (konferens)
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 i proceeding
2009

Measurement accuracy in Network-RTK

R. Emardson, P. Jarlemark, S. Bergstrand et al
Rapport
2009

e-VLBI related activities at Onsala Space Observatory

Simon Casey, Rüdiger Haas, Michael Lindqvist et al
Proceedings of the 8th International e-VLBI Workshop. 22-26 June 2009. Madrid, Spain
Paper i proceeding
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
Konferensbidrag (offentliggjort, men ej förlagsutgivet)
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
Artikel i vetenskaplig tidskrift
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
Kapitel i bok
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
Poster (konferens)
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
Poster (konferens)
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
Konferensbidrag (offentliggjort, men ej förlagsutgivet)
2009

Validation of climate models using European ground-based GNSS observations

Gunnar Elgered, R. 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
Konferensbidrag (offentliggjort, men ej förlagsutgivet)
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 i proceeding
2008

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

R. Emardson, Per Olof E Hedekvist, M. Nilsson et al
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT. Vol. 57 (11), p. 2495-2501
Artikel i vetenskaplig tidskrift
2008

The impact of the electromagnetic environment of the antenna on GPS

Tong Ning, Tobias Nilsson, Jan Johansson et al
2008.05
Poster (konferens)
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
Konferensbidrag (offentliggjort, men ej förlagsutgivet)
2008

The impact of the electromagnetic environment of the antenna on GPS

Tong Ning, Jan Johansson, Gunnar Elgered
2008.04
Poster (konferens)
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
Kapitel i bok
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
Poster (konferens)
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
Artikel i vetenskaplig tidskrift
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
Konferensbidrag (offentliggjort, men ej förlagsutgivet)
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 i proceeding
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 i proceeding
2006

Accurate time transfer utilizing the synchronization in an SDH-network

Per Olof E Hedekvist, T. 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 i 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
Konferensbidrag (offentliggjort, men ej förlagsutgivet)
2006

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

T. 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 i proceeding
2005

Ionospheric Corrections for Accurate Positioning in Real Time

Sten Bergstrand, R. 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
Konferensbidrag (offentliggjort, men ej förlagsutgivet)
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
Konferensbidrag (offentliggjort, men ej förlagsutgivet)
2005

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

R. 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 i proceeding
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
Konferensbidrag (offentliggjort, men ej förlagsutgivet)
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
Artikel i vetenskaplig tidskrift
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)
Artikel i vetenskaplig tidskrift
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 i proceeding
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
Artikel i övriga tidskrifter
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)
Artikel i vetenskaplig tidskrift
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
Artikel i vetenskaplig tidskrift
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
Artikel i vetenskaplig tidskrift

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