Johan Löfgren

Visar 37 publikationer

2016

Software-Defined Radio Direct Correlation GNSS Reflectometry by Means of GLONASS

Thomas Hobiger, Rüdiger Haas, Johan Löfgren
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing. Vol. 9 (10), p. 4834-4842
Artikel i vetenskaplig tidskrift
2015

Onsala Space Observatory – IVS Network Station Activities during 2014

Rüdiger Haas, Gunnar Elgered, Johan Löfgren et al
International VLBI Service for Geodesy and Astrometry 2014 Annual Report, p. 98-101
Kapitel i bok
2015

Onsala Space Observatory – IVS Analysis Center Activities during 2014

Rüdiger Haas, Thomas Hobiger, Hans-Georg Scherneck et al
International VLBI Service for Geodesy and Astrometry 2014 Annual Report, p. 252-255
Kapitel i bok
2014

Sea level time series and ocean tide analysis from multipath signals at five GPS sites in different parts of the world

Johan Löfgren, Rüdiger Haas, Hans-Georg Scherneck
Journal of Geodynamics. Vol. 80, p. 66-80
Artikel i vetenskaplig tidskrift
2014

Local Sea Level Observations Using Reflected GNSS Signals

Johan Löfgren
Doktorsavhandling
2014

Sea level measurements using multi-frequency GPS and GLONASS observations

Johan Löfgren, Rüdiger Haas
Eurasip Journal on Advances in Signal Processing. Vol. 2014 (1)
Artikel i vetenskaplig tidskrift
2014

Onsala Space Observatory – IVS Network Station Activities During 2013

Rüdiger Haas, Gunnar Elgered, Johan Löfgren et al
International VLBI Service for Geodesy and Astrometry 2013 Annual Report, edited by K. D. Baver, D. Behrend, and K. L. Armstrong, NASA/TP-2014-217522, 2014., p. 151-154
Kapitel i bok
2014

Twin Telescope and Tide Gauge Plans for the Onsala Space Observatory

Rüdiger Haas, Gunnar Elgered, Johan Löfgren
IVS General Meeting 2014, Shanghai
Poster (konferens)
2014

Twin Telescope and Tide Gauge Plans for the Onsala Space Observatory

Rüdiger Haas, Gunnar Elgered, Johan Löfgren
IVS 2014 General Meeting Proceedings "VGOS: The New VLBI Network", Edited by Dirk Behrend, Karen D. Baver, and Kyla L. Armstrong, Science Press (Beijing), p. 205-209
Konferensbidrag (offentliggjort, men ej förlagsutgivet)
2014

Onsala Space Observatory – IVS Analysis Center Activities during 2013

Rüdiger Haas, Hans-Georg Scherneck, Johan Löfgren et al
International VLBI Service for Geodesy and Astrometry 2013 Annual Report, edited by K. D. Baver, D. Behrend, and K. L. Armstrong, NASA/TP-2014-217522, 2014., p. 304-307
Kapitel i bok
2014

GLONASS-R: GNSS reflectometry with an FDMA based satellite navigation system

Thomas Hobiger, Rüdiger Haas, Johan Löfgren
Radio Science. Vol. 49 (4), p. 271-282
Artikel i vetenskaplig tidskrift
2014

Sea level observations using multi-system GNSS reflectometry

Johan Löfgren, Rüdiger Haas
Proceedings of the 17th NKG (Nordic Geodetic Commission) General Assembly 1-4 September 2014, Göteborg, Sweden
Konferensbidrag (offentliggjort, men ej förlagsutgivet)
2013

Onsala Space Observatory – IVS Analysis Center

Rüdiger Haas, Hans-Georg Scherneck, Gunnar Elgered et al
International VLBI Service for Geodesy and Astrometry 2012 Annual Report, p. 298-301
Kapitel i bok
2013

Onsala Space Observatory – IVS Network Station

Rüdiger Haas, Gunnar Elgered, Johan Löfgren et al
International VLBI Service for Geodesy and Astrometry 2012 Annual Report, p. 130-133
Kapitel i bok
2013

Coastal Sea Level Measurements Using a Single Geodetic GPS Receiver

Kristine Larson, Johan Löfgren, Rüdiger Haas
Advances in Space Research. Vol. 51 (8), p. 1301-1310
Artikel i vetenskaplig tidskrift
2012

Remote Sensing of the Coastal Ocean with Standard Geodetic GNSS-Equipment

Johan Löfgren, Rüdiger Haas, Kristine Larson et al
European Geosciences Union General Assembly 2012, 22-27 April, Vienna, Austria
Poster (konferens)
2012

Onsala Space Observatory - IVS Analysis Center

Rüdiger Haas, Tong Ning, Gunnar Elgered et al
International VLBI Service for Geodesy and Astrometry 2011 Annual Report, edited by K. D. Baver and D. Behrend (NASA/TP-2012-217505), p. 249-251
Kapitel i bok
2012

Onsala Space Observatory - IVS Network Station

Rüdiger Haas, Gunnar Elgered, Johan Löfgren et al
International VLBI Service for Geodesy and Astrometry 2011 Annual Report, edited by K. D. Baver and D. Behrend (NASA/TP-2012-217505), p. 88-91
Kapitel i bok
2012

Sea Level Records from Geodetic GPS Receivers: a New Coastal Sea Level Dataset

Johan Löfgren, Rüdiger Haas, Hans-Georg Scherneck et al
American Geophysical Union (AGU) Fall Meeting, 3-7 December 2012, San Francisco
Poster (konferens)
2011

Monitoring coastal sea level with reflected GNSS signals

Rüdiger Haas, Johan Löfgren
The Adlerbert Research Foundation Jubilee Conference 2011, Gothenburg
Poster (konferens)
2011

Sea-Level Analysis Using 100 Days of Reflected GNSS Signals

Johan Löfgren, Rüdiger Haas, Hans-Georg Scherneck
Proceedings of the 3rd International Colloquium - Scientific and Fundamental Aspects of the Galileo Programme, 31 August - 2 September 2011, Copenhagen, Denmark (WPP 326), p. 5-
Konferensbidrag (offentliggjort, men ej förlagsutgivet)
2011

Three months of local sea level derived from reflected GNSS signals

Johan Löfgren, Rüdiger Haas, Hans-Georg Scherneck et al
Radio Science. Vol. 46 (RS0C05)
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
2011

The GPS Tide Gauge Problem Revisited

Kristine Larson, Johan Löfgren, Rüdiger Haas
American Geophysical Union Fall Meeting 2011, 5-9 December, San Francisco, USA
Poster (konferens)
2011

Sea Level Derived from Reflected GNSS Signals

Johan Löfgren, Rüdiger Haas, Hans-Georg Scherneck
American Geophysical Union Fall Meeting 2011, 5-9 December, San Francisco, USA
Poster (konferens)
2011

Onsala Space Observatory - IVS Network Station

Rüdiger Haas, Gunnar Elgered, Johan Löfgren et al
International VLBI Service for Geodesy and Astrometry 2010 Annual Report, edited by D. Behrend and K.Baver (NASA/TP-2011-215880), p. 75-78
Kapitel i bok
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

Tropospheric correction for InSAR using interpolated ECMWF data and GPS zenith total delay from the Southern California Integrated GPS Network

Johan Löfgren, Fredrik Björndahl, Angelyn Moore et al
Proceedings of the 2010 IEEE International Geoscience and Remote Sensing Symposium, Proceedings DVD-ROM, p. 4503-4506
Konferensbidrag (offentliggjort, men ej förlagsutgivet)
2010

Experience with the GNSS-based tide gauge at the Onsala Space Observatory

Johan Löfgren, Rüdiger Haas
Workshop on GNSS Reflectometry, GNSS-R 2010, 21-22 October 2010, Barcelona, Spain
Poster (konferens)
2010

Onsala Space Observatory - IVS Network Station

Rüdiger Haas, Gunnar Elgered, Johan Löfgren et al
IVS 2009 Annual Report, p. 113-116
Artikel i övriga tidskrifter
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)
2010

Tropospheric Correction for InSAR Using Interpolated ECMWF Data and GPS Zenith Total Delay From the Southern California Integrated GPS Network

Johan Löfgren, Fredrik Björndahl, Angelyn Moore et al
IEEE International Geoscience and Remote Sensing Symposium, 25 - 30 July 2010, Honolulu, Hawaii, USA
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
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

Onsala Space Observatory – IVS Technology Development Center

Rüdiger Haas, Leif Helldner, Miroslav Pantaleev et al
In: International VLBI Service for Geodesy and Astrometry 2008 Annual Report, edited by D. Behrend and K. Baver. Vol. NASA/TP-2009-214183, 2009, p. 329-332
Artikel i övriga tidskrifter
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)

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