Development of airborne aperture synthetic radiometer (HUT-2D). - Kimmo Rautiainen; Robert Butora; Tuomo Auer; Jani Kettunen; Juha Kainulainen; Ilkka Mononen; Diego Beltrami; Martti Hallikainen (IGARSS, 2003)

Systematic noise analysis of a correlation radiometer front-end. - Ignasi Corbella; Francesc Torres 002; Adriano Camps; Nuria Duffo; Mercè Vall-Llossera; Kimmo Rautiainen; Andreas Colliander (IGARSS, 2004)

Calibration subsystem for spaceborne interferometric radiometer. - Janne Lahtinen; Josu Uusitalo; Nestori Fabritius; Mikael Levander; Ville Kangas; Juha Lemmetyinen; Kimmo Rautiainen; Heli Greus (IGARSS, 2005)

MIRAS end-to-end calibration: application to SMOS L1 processor. - Ignasi Corbella; Francesc Torres 002; Adriano Camps; Andreas Colliander; Manuel Martín-Neira; Serni Ribo; Kimmo Rautiainen; Nuria Duffo; Mercedes Magdalena Vall-Llossera (IEEE Trans. Geosci. Remote. Sens., 2005)

Analysis of correlation and total power radiometer front-ends using noise waves. - Ignasi Corbella; Francesc Torres 002; Adriano Camps; Nuria Duffo; Mercedes Magdalena Vall-Llossera; Kimmo Rautiainen; Manuel Martín-Neira; Andreas Colliander (IEEE Trans. Geosci. Remote. Sens., 2005)

SMOS Calibration Subsystem. - Juha Lemmetyinen; Josu Uusitalo; Kimmo Rautiainen; Juha Kainulainen; Nestori Fabritius; Mikael Levander; Ville Kangas; Heli Greus; Jörgen Pihlflyckt; Anna Kontu; Sami Kemppainen; Martti Hallikainen; et al. (IGARSS, 2006)

Ground calibration of SMOS: NIR and CAS. - Andreas Colliander; Juha Lemmetyinen; Josu Uusitalo; Jani Suomela; Katriina Veijola; Anna Kontu; Sami Kemppainen; Jörgen Pihlflyckt; Kimmo Rautiainen; Martti Hallikainen; Janne Lahtinen (IGARSS, 2007)

Radiometric performance of interferometric synthetic aperture radiometer HUT-2D. - Juha Kainulainen; Kimmo Rautiainen; Martti Hallikainen; Matias Takala (IGARSS, 2007)

Thermal stabilized front-end PCB with active cold calibration load for L-band radiometer. - Sami Kemppainen; Juha Lemmetyinen; Tuomo Auer; Andreas Colliander; Aleksi Aalto; Kimmo Rautiainen; Martti Hallikainen (IGARSS, 2007)

Helsinki University of Technology Synthetic Aperture Radiometer -HUT-2D. - Kimmo Rautiainen; Juha Kainulainen; Tuomo Auer; Simo Tauriainen; Martti Hallikainen (IGARSS, 2007)

First 2-D Interferometric Radiometer Imaging of the Earth From an Aircraft. - Juha Kainulainen; Kimmo Rautiainen; Simo Tauriainen; Tuomo Auer; Jani Kettunen; Martti Hallikainen (IEEE Geosci. Remote. Sens. Lett., 2007)

SMOS Calibration Subsystem. - Juha Lemmetyinen; Josu Uusitalo; Juha Kainulainen; Kimmo Rautiainen; Nestori Fabritius; Mikael Levander; Ville Kangas; Heli Greus; Jörgen Pihlflyckt; Anna Kontu; Sami Kemppainen; Andreas Colliander; et al. (IEEE Trans. Geosci. Remote. Sens., 2007)

Helsinki University of Technology L-Band Airborne Synthetic Aperture Radiometer. - Kimmo Rautiainen; Juha Kainulainen; Tuomo Auer; Jörgen Pihlflyckt; Jani Kettunen; Martti Hallikainen (IEEE Trans. Geosci. Remote. Sens., 2008)

Sea Surface Salinity Retrieval Demonstration using Datasets of Synthetic Aperture Radiometer HUT-2D. - Juha Kainulainen; Kimmo Rautiainen; Juha Lemmetyinen; Martti Hallikainen; Fernando Martín-Porqueras; Manuel Martín-Neira (IGARSS (3), 2009)

Soil Moisture Retrieval from HUT-2D Synthetic Aperture Radiometer Data. - Jaakko Seppänen; Juha Kainulainen; Juha Lemmetyinen; Kimmo Rautiainen; Martti Hallikainen; Marko Mäkynen (IGARSS (3), 2009)

Error Propagation in Calibration Networks of Synthetic Aperture Radiometers. - Juha Kainulainen; Juha Lemmetyinen; Kimmo Rautiainen; Andreas Colliander; Josu Uusitalo; Janne Lahtinen (IEEE Trans. Geosci. Remote. Sens., 2009)

Studies of radio frequency interference at L-band using an airborne 2-D interferometric radiometer. - Martti Hallikainen; Juha Kainulainen; Jaakko Seppänen; Anssi Hakkarainen; Kimmo Rautiainen (IGARSS, 2010)

SMOS calibration and validation activities with airborne interferometric radiometer HUT-2D during spring 2010. - Juha Kainulainen; Kimmo Rautiainen; Pauli Sievinen; Jaakko Seppänen; Erkka Rouhe; Martti Hallikainen; Johanna T. Dall'Amico; Florian Schlenz; Alexander Loew; Alexander Bircher; Carsten Montzka (IGARSS, 2010)

L-band measurements of boreal soil. - Anna Kontu; Juha Lemmetyinen; Jouni Pulliainen; Kimmo Rautiainen; Juha Kainulainen; Jaakko Seppänen (IGARSS, 2010)

Lessons learned from HUT-2D L-band airborne demonstrator. - Juha Kainulainen; Kimmo Rautiainen; Martti T. Hallikainen (IGARSS, 2011)

Analysis of active and passive microwave observations from the NoSREx campaign. - Juha Lemmetyinen; Jouni Pulliainen; Ali Nadir Arslan; Anna Kontu; Kimmo Rautiainen; Juho Vehvilainen; Andreas Wiesmann; Thomas Nagler; Helmut Rott; Malcolm Davidson; Dirk Schuettemeyer; Michael Kern (IGARSS, 2011)

Synthetic aperture radiometer measurements of freezing soil. - Jaakko Seppänen; Juha Kainulainen; Martti Hallikainen; Juha Lemmetyinen; Kimmo Rautiainen (IGARSS, 2011)

Detection of a Sea Surface Salinity Gradient Using Data Sets of Airborne Synthetic Aperture Radiometer HUT-2-D and a GNSS-R Instrument. - Juha Kainulainen; Kimmo Rautiainen; Juha Lemmetyinen; Martti T. Hallikainen; Fernando Martín-Porqueras; Manuel Martín-Neira (IEEE Trans. Geosci. Remote. Sens., 2011)

Experimental Study on Radiometric Performance of Synthetic Aperture Radiometer HUT-2D - Measurements of Natural Targets. - Juha Kainulainen; Kimmo Rautiainen; Juha Lemmetyinen; Jaakko Seppänen; Pauli Sievinen; Matias Takala; Martti T. Hallikainen (IEEE Trans. Geosci. Remote. Sens., 2011)

L-Band Radiometer Observations of Soil Processes in Boreal and Subarctic Environments. - Kimmo Rautiainen; Juha Lemmetyinen; Jouni Pulliainen; Juho Vehvilainen; Matthias Drusch; Anna Kontu; Juha Kainulainen; Jaakko Seppänen (IEEE Trans. Geosci. Remote. Sens., 2012)

Potential of L-band passive microwave radiometry for snow parameter retrieval. - Juha Lemmetyinen; Mike Schwank; Kimmo Rautiainen; Anna Kontu; Tiina Parkkinen; Christian Mätzler; Andreas Wiesmann; Urs Wegmüller; Chris Derksen; Peter Toose; Alexandre Roy; Jouni Pulliainen (IGARSS, 2015)

Snow Density and Ground Permittivity Retrieved from L-Band Radiometry: A Synthetic Analysis. - Mike Schwank; Christian Mätzler; Andreas Wiesmann; Urs Wegmüller; Jouni Pulliainen; Juha Lemmetyinen; Kimmo Rautiainen; Chris Derksen; Peter Toose; Matthias Drusch (IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2015)

Retrieval of snow parameters from L-band observations - application for SMOS and SMAP. - Juha Lemmetyinen; Mike Schwank; Chris Derksen; Alexandre Roy; Andreas Colliander; Kimmo Rautiainen; Jouni Pulliainen (IGARSS, 2016)

Future mission concepts for measuring snow mass. - Juha Lemmetyinen; Kimmo Rautiainen; Kari Luojus; Helmut Rott; Thomas Nagler; Giuseppe Parrella; Irena Hajnsek; Chris Derksen; Giovanni Macelloni; Marco Brogioni; Andreas Wiesmann; Christian Mätzler; et al. (IGARSS, 2017)

Season -Length Observations of Active and Passive Microwave Signatures of Snow Cover in a Boreal Forest Environment. - Juha Lemmetyinen; Anna Kontu; Leena Leppänen; Juho Vehvilainen; Risto Vehmas; Qinghuan Li; Kimmo Rautiainen; Jouni Pulliainen (IGARSS, 2018)

Cryorad: A Low Frequency Wideband Radiometer Mission for the Study of the Cryosphere. - Giovanni Macelloni; Marco Brogioni; Marion Leduc-Leballeur; Francesco Montomoli; Annett Bartsch; Arnaud Mialon; Catherine Ritz; Josep Closa Soteras; Detlef Stammer; Ghislain Picard; Giacomo De Carolis; Jacqueline Boutin; et al. (IGARSS, 2018)

Smos Retrievals of Soil Freezing and Thawing and its Applications. - Kimmo Rautiainen; Juha Lemmetyinen; Tuula Aalto; Aki Tsuruta; Vilma Kangasaho; Jaakko Ikonen; Juval Cohen; Anna Kontu; Juho Vehvilainen; Jouni Pulliainen (IGARSS, 2018)

Soil Permittivity and Soil Frost Retrievals Using a Synergistic Method for Active and Passive Microwave Instruments. - Tuomo Smolander; Juha Lemmetyinen; Kimmo Rautiainen; Mike Schwank; Jouni Pulliainen (IGARSS, 2018)

GNSS Transpolar Earth Reflectometry exploriNg System (G-TERN): Mission Concept. - Estel Cardellach; Jens Wickert; Rens Baggen; Javier Benito; Adriano Camps; Nuno Catarino; Bertrand Chapron; Andreas Dielacher; Fran Fabra; Greg Flato; Heinrich Fragner; Carolina Gabarró; et al. (IEEE Access, 2018)

A Modeling-Based Approach for Soil Frost Detection in the Northern Boreal Forest Region With C-Band SAR. - Juval Cohen; Kimmo Rautiainen; Jaakko Ikonen; Juha Lemmetyinen; Tuomo Smolander; Juho Vehvilainen; Jouni Pulliainen (IEEE Trans. Geosci. Remote. Sens., 2019)

SodSAR: A Tower-Based 1-10 GHz SAR System for Snow, Soil and Vegetation Studies. - Jorge Jorge Ruiz; Risto Vehmas; Juha Lemmetyinen; Josu Uusitalo; Janne Lahtinen; Kari Lehtinen; Anna Kontu; Kimmo Rautiainen; Riku Tarvainen; Jouni Pulliainen; Jaan Praks (Sensors, 2020)

GNSS-Reflected Signals for Permafrost Monitoring. - Kimmo Rautiainen; Davide Comite; Juval Cohen; Martin Unwin; Nazzareno Pierdicca (IGARSS, 2021)

Utilizing Earth Observations of Soil Freeze/Thaw Data and Atmospheric Concentrations to Estimate Cold Season Methane Emissions in the Northern High Latitudes. - Maria Tenkanen; Aki Tsuruta; Kimmo Rautiainen; Vilma Kangasaho; Raymond Ellul; Tuula Aalto (Remote. Sens., 2021)

An Introduction to the HydroGNSS GNSS Reflectometry Remote Sensing Mission. - Martin Unwin; Nazzareno Pierdicca; Estel Cardellach; Kimmo Rautiainen; Giuseppe Foti; Paul Blunt; Leila Guerriero; Emanuele Santi; Michel Tossaint (IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2021)

GNSS-R for Sustainable Development: A Review of the Geophysical Variables Addressed by the Hydrognss Mission. - Davide Comite; Estel Cardellach; Laura Dente; Leila Guerriero; Weiqiang Li 001; Nazzareno Pierdicca; Kimmo Rautiainen; Emanuele Santi; Martin Unwin; Maria Paola Clarizia; Massimiliano Pastena; Jean-Pascal Lejault (IGARSS, 2022)

Daily High-Resolution Land Surface Freeze/Thaw Detection Using Sentinel-1 and AMSR2 Data. - Jian Wang 063; Lingmei Jiang; Kimmo Rautiainen; Cheng Zhang; Zhiqiang Xiao 002; Heng Li; Jianwei Yang; Huizhen Cui (Remote. Sens., 2022)

Freeze-Thaw Detection Over High-Latitude Regions by Means of GNSS-R Data. - Kimmo Rautiainen; Davide Comite; Juval Cohen; Estel Cardellach; Martin Unwin; Nazzareno Pierdicca (IEEE Trans. Geosci. Remote. Sens., 2022)

Effects of Arctic Wetland Dynamics on Tower-Based GNSS Reflectometry Observations. - Ladina Steiner; Fran Fabra; Kimmo Rautiainen; Juha Lemmetyinen; Juval Cohen; Estel Cardellach (IEEE Trans. Geosci. Remote. Sens., 2022)

Snow Density and Ground Permittivity Retrieval Problem with L-Band Satellite Radiometer Observations - Case Study from Sodankylä, Finland. - Manu Holmberg; Juha Lemmetyinen; Mike Schwank; Anna Kontu; Kimmo Rautiainen (IGARSS, 2023)

On The Need of a New High-Resolution L-Band Mission to Study Land/Water/Ice Interfaces. - Nemesio Rodriguez-Fernandez; Jacqueline Boutin; Lars Kaleschke; Gabrielle De Lannoy; Giovanni Macelloni; Kimmo Rautiainen; Maria José Escorihuela; Peter Weston; Patricia de Rosnay; Jean-Christophe Calvet; Frédéric Frappart; Alexandre Roy; et al. (IGARSS, 2023)

Environmental and Seasonal Variability of High Latitude Methane Emissions Based on Earth Observation Data and Atmospheric Inverse Modelling. - Anttoni Erkkilä; Maria Tenkanen; Aki Tsuruta; Kimmo Rautiainen; Tuula Aalto (Remote. Sens., 2023)

ESA Hydrognss Scout GNSS-R Land Sensing Mission Preparation. - Martin Unwin; Peter Garner; Lily Rose; Reynolt De Vos Van Steenwijk; Jonathan Rawlinson; Tom Norris; Nazzareno Pierdicca; Estel Cardellach; Jilun Peng; Leila Guerriero; Giuseppe Foti; Duncan Robinson; et al. (IGARSS, 2024)

Evaluation of Sentinel-5P TROPOMI Methane Observations at Northern High Latitudes. - Hannakaisa Lindqvist; Ella Kivimäki; Tuomas Häkkilä; Aki Tsuruta; Oliver Schneising; Michael Buchwitz; Alba Lorente; Mari Martinez Velarte; Tobias Borsdorff; Carlos Alberti; Leif Backman; Matthias Buschmann; et al. (Remote. Sens., 2024)

Advancing the Arctic Methane Permafrost Challenge (AMPAC) With Future Satellite Missions. - Annett Bartsch; Bradley A. Gay; Dirk Schüttemeyer; Edward Malina; Kimberley R. Miner; Guido Grosse; Andreas Fix; Johanna Tamminen; Hartmut Boesch; Robert J. Parker; Kimmo Rautiainen; Josh Hashemi; et al. (IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2025)