Warnant, R. (31 May 2022). Ionosphere Monitoring Using Dual Frequency Smartphones [Paper presentation]. URSI AT-AP RASC Meeting, Gran Canaria, Spain. |
Billen, R., Binard, M., Cornet, Y., Hallot, P., Kasprzyk, J.-P., Warnant, R., & Sheeren, D. (2019). Un regard sur l’évolution de la géomatique : analyse de 4 décennies de recherche au sein du Département de Géographie de l’Université de Liège. Bulletin de la Société Géographique de Liège, (72), 11-32. |
Lonchay, M., & Warnant, R. (2019). Intégration de cartes de scintillations ionosphériques dans les algorithmes de positionnement par satellites. Bulletin de la Société Géographique de Liège, 72 (2019/1). doi:10.25518/0770-7576.5836 |
Deprez, C., & Warnant, R. (28 September 2018). GPS + Galileo Single-Frequency Relative Positioning with low-cost receivers [Paper presentation]. 31st International Technical Meeting of the Satellite Division of the Institute of Navigation (ION GNSS+ 2018), Miami, Florida, United States. |
Warnant, R., Van De Vyvere, L., & Warnant, Q. (2018). Positioning with Single and Dual Frequency Smartphones Running Android 7 or Later. In Proceedings of the 31st International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2018) (pp. 284 - 303). doi:10.33012/2018.15880 |
Warnant, R., Deprez, C., & Warnant, Q. (17 November 2017). Precise Positioning with Smartphones running Android 7 or later [Paper presentation]. Belgian Geography Day, Liege, Belgium. |
Deprez, C., & Warnant, R. (16 March 2017). Positioning in multi-GNSS mode [Paper presentation]. Begeo 2017, Bruxelles, Belgium. |
Deprez, C., & Warnant, R. (2016). Multi-GNSS relative positioning with Galileo, BeiDou and GPS. In Proceedings of NAVITEC 2016. |
Warnant, R., & Deprez, C. (2016). The added value of new GNSS for ionosphere monitoring. In Proceedings of Navitec 2016. |
Deprez, C., & Warnant, R. (11 October 2016). Relative positioning with Galileo E5 AltBOC code measurements [Paper presentation]. The CLGE Students' Contest 2016. |
Deprez, C., & Warnant, R. (07 September 2016). GPS, Galileo and BeiDou inter-system biases estimation in relative positioning with code and phase pseudoranges [Paper presentation]. International Association of Geodesy (IAG), Commission 4 Symposium, Wroclaw, Poland. |
Warnant, R., Deprez, C., & Van de Vyvere, L. (September 2016). The added value of new GNSS to monitor the ionosphere [Paper presentation]. International Association of Geodesy – Commission 4 Symposium on Positioning and Navigation, Wroclaw, Poland. |
Deprez, C., & Warnant, R. (18 April 2016). Inter-system biases estimation in multi-GNSS relative positioning with GPS and Galileo [Paper presentation]. European Geosciences Union General Assembly 2016, Vienne, Austria. |
Wautelet, G., & Warnant, R. (17 November 2014). GNSS observational bias in the frame of ionospheric studies [Poster presentation]. 11th European Space Weather Week, Liège, Belgium. |
Wautelet, G., & Warnant, R. (02 May 2014). Tropospheric jet stream as a source of traveling ionospheric disturbances observed by GPS [Poster presentation]. European Geosciences Union (EGU) General Assembly 2014, Vienne, Austria. |
Lonchay, M., Cornet, Y., Aquino, M., & Warnant, R. (30 April 2014). Spatio-Temporal Analysis of Equatorial Ionospheric Scintillations in the Frame of Absolute GNSS Positioning Algorithms [Paper presentation]. European Geoscience Union General Assembly 2014, Vienna, Austria. |
Lonchay, M., Cornet, Y., Aquino, M., & Warnant, R. (23 April 2014). Spatio-Temporal Analysis of Equatorial Ionospheric Scintillations in the Frame of Absolute GNSS Positioning Algorithms [Poster presentation]. Workshop on Correlated Observation Errors, Reading, United Kingdom. |
Wautelet, G., & Warnant, R. (July 2013). Modeling and forecasting the occurrence of ionospheric irregularities in mid-latitude regions [Paper presentation]. Beacon Satellite Symposium 2013, Bath, United Kingdom. |
Bidaine, B., Lonchay, M., & Warnant, R. (01 January 2013). Galileo Single Frequency Ionospheric Correction: Performances in Terms of Position. GPS Solutions, 17 (1), 63-73. doi:10.1007/s10291-012-0261-0 |
Jakowski, N., Béniguel, Y., De Franceschi, G., Hernandez-Pajares, M., Jacobsen, K. S., Stanislawska, I., Tomasik, L., Warnant, R., & Wautelet, G. (December 2012). Monitoring, tracking and forecasting ionospheric perturbations using GNSS techniques. Journal of Space Weather and Space Climate, 2 (A22). doi:10.1051/swsc/2012022 |
Wautelet, G., & Warnant, R. (11 September 2012). Local climatological modeling of ionospheric irregularities detected by GPS in mid-latitude region. Journal of Atmospheric and Solar-Terrestrial Physics, 89, 132-143. doi:10.1016/j.jastp.2012.08.015 |
Lonchay, M., Aquino, M., Hancock, C., & Warnant, R. (14 June 2012). Precise Point Positioning: Performances under Ionospheric Scintillations [Paper presentation]. New Navigator Seminar 2012, University of Nottingham, United Kingdom. |
Brenot, H., Champollion, C., Deckmyn, A., Van Malderen, R., Kumps, N., Warnant, R., & De Mazière. (April 2012). Humidity 3D field comparisons between GNSS tomography, IASI satellite observations and ALARO model. Geophysical Research Abstracts, 14, 2012-4285, 2012. |
Bruyninx, C., Dehant, V., Defraigne, P., Ducarme, B., Everaerts, M., Legrand, J., Roosbeek, F., Rosenblatt, P., Van Camp, M., Van Hoolst, T., Voet, P., Warnant, R., & Yseboodt, M. (2012). Belgian Report of activity in the frame of the International Association of Geodesy. International Association of Geodesy. |
Stankov, S., Jodogne, J.-C., Kutiev, I., Stegen, K., & Warnant, R. (2012). Evaluation of the automatic ionogram scaling for use in real-time ionospheric density profile specification: Dourbes DGS-256/ARTIST-4 performance. Annals of Geophysics, 55 (2), 283-291. doi:10.4401/ag-4976 |
Lonchay, M., Bidaine, B., & Warnant, R. (2011). An Efficient Dual and Triple Frequency Preprocessing Method for GALILEO and GPS Signals. In 3rd International Colloquium – Scientific and Fundamentals Aspects of the GALILEO Programme. |
Humbled, F., Rasson, J., Spassov, S., Hus, J., & Warnant, R. (30 August 2011). Magnetic Valley : a knowledge transfer project. Data Science Journal, 10. |
Bidaine, B., & Warnant, R. (2011). Galileo Single Frequency Ionospheric Correction: Performances in Terms of Position. In J. M. Goodman (Ed.), 2011 Ionospheric Effects Symposium Proceedings. JMG Associates Ltd. |
Stankov, S., Stegen, K., Muhtarov, P., Marinov, P., & Warnant, R. (2011). On the real time reconstruction of the ionospheric electron density profile based on concurrent measurements from collocated digital ionosonde and GNSS receiver [Paper presentation]. 13th International Ionospheric Effects Symposium (IES2011), Alexandria, United States. |
Stankov, S., Stegen, K., Muhtarov, P., & Warnant, R. (April 2011). Local ionospheric electron density profile reconstruction in real time from simultaneous ground-based GNSS and ionosonde measurements. Advances in Space Research, 47 (7), 1172-1180. doi:10.1016/j.asr.2010.11.039 |
Stankov, S., Wautelet, G., Lejeune, S., Spits, J., & Warnant, R. (April 2011). On the impact of ionospheric variability and disturbances on GNSS-based positioning applications [Paper presentation]. EGU General Assembly 2011, Vienna, Austria. |
Stankov, S., Stegen, K., Jodogne, J.-C., & Warnant, R. (2011). RMI-Dourbes ionosonde database - Status 2010. Brussels, Belgium: Royal Meteorological Institute of Belgium. |
Bidaine, B., & Warnant, R. (15 January 2011). Ionosphere modelling for Galileo single frequency users: illustration of the combination of the NeQuick model and GNSS data ingestion. Advances in Space Research, 47 (2), 312-322. doi:10.1016/j.asr.2010.09.001 |
Stankov, S., Stegen, K., & Warnant, R. (2011). K-type geomagnetic index nowcast with data quality control. Annals of Geophysics, 54 (3), 285-295. doi:10.4401/ag-4655 |
Wautelet, G., Lejeune, S., & Warnant, R. (December 2010). A GPS/GNSS dense network used to monitor ionospheric positioning error [Poster presentation]. American Geophysical Union Fall Meeting, San Francisco, United States. |
Warnant, R., Lejeune, S., Wautelet, G., Spits, J., Stegen, K., & Stankov, S. (July 2010). The RMI Space Weather and Navigation Systems (SWANS) project [Paper presentation]. 38th COSPAR Scientific Assembly, Bremen, Germany. |
Bidaine, B., Nava, B., Stankov, S., & Warnant, R. (2010). M-Ingestion: Simultaneous Ingestion of Ionosonde and GNSS Data into the NeQuick Model. In P. Doherty, M. Hernández-Pajares, J.-M. Juan, J. Sanz, ... A. Aragon-Angel (Eds.), The International Beacon Satellite Symposium BSS2010. Barcelone, Spain: CIMNE. |
Spits, J., & Warnant, R. (2010). Total Electron Content monitoring using triple frequency GNSS: Results with GIOVE-A/-B data [Paper presentation]. The International Beacon Satellite Symposium 2010 (BSS2010), Barcelona, Spain. |
Stankov, S., Stegen, K., & Warnant, R. (2010). A statistical study of the TEC storm-time response at European middle latitudes for use in ionospheric nowcast and forecast. In P. Doherty, M. Hernandez-Pajares, J.-M. Juan, J. Sanz, ... A. Aragon-Angel (Eds.), The International Beacon Satellite Symposium 2010. |
Stankov, S., Stegen, K., Wautelet, G., & Warnant, R. (06 May 2010). On the local operational geomagnetic index K calculation [Poster presentation]. European Geosciences Union General Assembly 2010, Vienne, Austria. |
Stankov, S., Stegen, K., & Warnant, R. (2010). Seasonal variations of storm-time TEC at European middle latitudes. Advances in Space Research, 46 (10), 1318-1325. doi:10.1016/j.asr.2010.07.017 |
Wautelet, G., Lejeune, S., Lonchay, M., & Warnant, R. (18 November 2009). Influence of geometry in the case of relative positioning with GNSS [Poster presentation]. Sixth European Space Weather Week, Bruges, Belgium. |
Bidaine, B., & Warnant, R. (2009). Ionosphere Modelling Based on the NeQuick Model and GNSS Data Ingestion. In Second International Colloquium - Scientific and Fundamental Aspects of the Galileo Programme. |
Spits, J., & Warnant, R. (2009). Total Electron Content monitoring using triple frequency GNSS: results with GIOVE-A data. In Proceedings of the Second International Colloquium - Scientific and Fundamental Aspects of the Galileo Programme. |
Bidaine, B., & Warnant, R. (2009). Measuring Total Electron Content with GNSS: Investigation of Two Different Techniques. In The Institution of Engineering and Technology 11th International Conference on Ionospheric Radio Systems and Techniques (IRST 2009) (pp. 201-206). London, United Kingdom: Institution of Engineering and Technology - IET. doi:10.1049/cp.2009.0063 |
Stankov, S., Warnant, R., & Kozarev, R. (April 2009). On the TEC short-term forecast with corrections based on the average ionospheric response to background and storm-time geomagnetic conditions. Geophysical Research Abstracts, 11 (Abs. No EGU2009-13283). |
Stankov, S., Warnant, R., & Stegen, K. (April 2009). Local electron density reconstruction from simultaneous ground-based GNSS and ionosonde measurements. Geophysical Research Abstracts, 11 (Abs. No EGU2009-10956). |
Wautelet, G., Lejeune, S., & Warnant, R. (2009). Effects of ionospheric small-scale structures on GNSS. In The Institution of Engineering and Technology 11th International Conference on Ionospheric Radio Systems and Techniques (IRST 2009) (pp. 196-200). London, United Kingdom: Institution of Engineering and Technology - IET. |
Stankov, S., & Warnant, R. (2009). Ionospheric slab thickness - Analysis, modelling and monitoring. Advances in Space Research, 44 (10), 1295-1303. doi:10.1016/j.asr.2009.07.010 |
Stankov, S., Warnant, R., & Stegen, K. (2009). Trans-ionospheric GPS signal delay gradients observed over mid-latitude Europe during the geomagnetic storms of October-November 2003. Advances in Space Research, 43 (9), 1314-1324. doi:10.1016/j.asr.2008.12.012 |
Warnant, R., Foelsche, U., Aquino, M., Bidaine, B., Gherm, V., Hoque, M. M., Kutiev, I., Lejeune, S., Luntama, J.-P., Spits, J., Strangeways, H. J., Wautelet, G., Zernov, N., & Jakowski, N. (2009). Mitigation of ionospheric effects on GNSS. Annals of Geophysics, 52 (3-4), 373-390. |
Bidaine, B., & Warnant, R. (2008). Towards an Improved Single-Frequency Ionospheric Correction: Focus on Mid-Latitudes. In 4th ESA Workshop on Satellite Navigation User Equipment Technologies NAVITEC. |
Bidaine, B., & Warnant, R. (18 November 2008). Modelling the Ionosphere over Europe: Investigation of NeQuick Formulation [Poster presentation]. 5th European Space Weather Week, Bruxelles, Belgium. |
Wautelet, G., Lejeune, S., & Warnant, R. (18 November 2008). Ionospheric variability which degrades the precision of real time GNSS applications [Poster presentation]. Fifth European Space Weather Week, Brussels, Belgium. |
Warnant, R., Wautelet, G., Spits, J., & Lejeune, S. (2008). Characterization of the ionospheric small-scale activity. (Technical Report, WP 220, GALOCAD Project, contract GJU/06/2423/CTR/GALOCAD). Brussels, Belgium: Royal Meteorological Institute of Belgium. |
Wautelet, G., Lejeune, S., Stankov, S., Brenot, H., & Warnant, R. (2008). Effects of small-scale atmospheric activity on precise positioning. (Technical Report, WP 230, GALOCAD Project, contract GJU/06/2423/CTR/GALOCAD). Brussels, Belgium: Royal Meteorological Institute of Belgium. |
Stankov, S., & Warnant, R. (2008). Ionospheric slab thickness: analysis and monitoring applications. In Proceedings of the 12th International Ionospheric Effects Symposium (IES2008) (pp. 159-164). |
Warnant, R., Bavier, M., Brenot, H., Lejeune, S., Spits, J., Stankov, S., & Wautelet, G. (2008). Galileo Local Component for the detection of atmospheric threats. In J. Goodman (Ed.), Proceedings of the 12th International Ionospheric Effects Symposium (IES2008) (pp. 149). |
Brenot, H., & Warnant, R. (2008). Characterization of the tropospheric small-scale activity. (Technical Report, WP 250, GALOCAD Project, contract GJU/06/2423/CTR/GALOCAD). |
Bidaine, B., & Warnant, R. (17 October 2007). Ionosphere Modelling for GALILEO Single Frequency Users [Poster presentation]. Séminaire Spatial Data Research in Belgium, Bruxelles, Belgium. |
Bidaine, B., & Warnant, R. (2007). Assessment of the NeQuick Model at Mid-latitudes using GPS TEC and Ionosonde Data. In First Colloquium Scientific and Fundamental Aspects of the Galileo Programme (pp. 10). |
Spits, J., & Warnant, R. (2007). Real time TEC monitoring using triple frequency GNSS data : a three step approach. In Proceedings of the First International Colloquium - Scientific and Fundamental Aspects of the Galileo Programme. |
Lejeune, S., & Warnant, R. (2006). Near real time assessment of the ionosphere effect on high accuracy GNSS applications which require ambiguity resolution. In Proceedings of the 2nd COST296 Workshop. |
Spits, J., & Warnant, R. (2006). Real time TEC monitoring using triple frequency GNSS data : A three step approach. In Proceedings of the 2nd COST296 Workshop. |
Warnant, R., & Lejeune, S. (2006). Characterisation of ionospheric small-scale structures over mid-latitudes in Europe. In Proceedings of the International Civil Aviation Organization Meeting. |
Donnay, J.-P., & Warnant, R. (Eds.). (2006). Techniques de positionnement par satellites. Bulletin de la Société Géographique de Liège, 47, 85. |
Warnant, R. (2006). L’effet de l’atmosphère terrestre sur les GNSS : une perturbation ou un signal géophysique ? Bulletin de la Société Géographique de Liège, 47, 19-23. |
Stankov, S., Jakowski, N., Wehrenpfenning, A., & Warnant, R. (2002). Index of local response to geomagnetic activity for use in the short-term ionospheric forecast. In Proceedings of the COST271 2002 workshop. |
Stankov, S., Warnant, R., & Jodogne, J.-C. (2002). Improved operational model for real-time reconstruction of the electron density profile at a single ionosonde location. In Proceedings of the COST271 2002 workshop. |
Stankov, S., Warnant, R., & Jodogne, J.-C. (2002). Operational model for real-time reconstruction of the electron density profile using GPS TEC measurements. In Proceedings of the XXVII URSI General Assembly. |
Warnant, R. (2002). Atmospheric perturbations on GNSS signals and their influence on time transfer. In Proceedings of the XXVII URSI General Assembly. |
Stankov, S., Warnant, R., & Jodogne, J.-C. (April 2002). A real-time operational procedure for GPS TEC based reconstruction of the electron profile at a single ionosonde location. Geophysical Research Abstracts, 4 (ABS No. EGS02-A-05554). |
Warnant, R., & Pottiaux, E. (2000). The increase of the ionospheric activity as measured by GPS. Earth, Planets, and Space, 52 (11), 1055-1060. doi:10.1186/BF03352330 |
Warnant, R. (1997). Reliability of the TEC computed using GPS measurements: the problem of hardware biases. Acta Geodaetica et Geophysica Hungarica, 32 (3-4), 451-459. |
Collin, F., & Warnant, R. (1995). Application of the Wavelet Transform for GPS Cycle Slip Correction and Comparison with Kalman Filter. Manuscripta Geodaetica, 20, 161-172. |