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Publications
Helmholtz Centre Potsdam
GFZ German Research Centre for Geosciences
(Co) Author: Schmidt, T.
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Steiner, A. K.; Hunt, D.; Ho, S.-P.; Kirchengast, G.; Mannucci, A. J.; Scherllin-Pirscher, B.; Gleisner, H.; v. Engeln, A.; Schmidt, T.; Ao, C.; Leroy, S. S.; Kursinski, E. R.; Foelsche, U.; Gorbunov, M.; Heise, S.; Kuo, Y.-H.; Lauritsen, K. B.; Marquardt, C.; Rocken, C.; Schreiner, W.; Sokolovskiy, S.; Syndergaard, S.; Wickert, J. (2013): Quantification of structural uncertainty in climate data records from GPS radio occultation. Atmospheric Chemistry and Physics, 13, 3, 1469-1484.
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de la Torre, A.; Alexander, P.; Hierro, R.; Llamedo, P.; Rolla, A.; Schmidt, T.; Wickert, J. (2012): Large amplitude gravity waves above the Southern Andes, the Drake Passage and the Antarctic Peninsula. Journal of Geophysical Research, 117, D2, 15 PP.
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Ho, S.; Hunt, D.; Steiner, A.; Mannucci, A. J.; Kirchengast, G.; Gleisner, H.; Heise, S.; v. Engeln, A.; Marquardt, C.; Sokolovskiy, S.; Schreiner, W.; Ao, C.; Wickert, J.; Syndergaad, S.; Lauritsen, K.; Leroy, S.; Kursinski, R.; Kuo, Y.-H.; Scherllin-Pirscher, B.; Foelsche, U.; Schmidt, T.; Gorbunov, M. (2012): Reproducibility of GPS radio occultation data for climate monitoring: Profile-to-profile inter-comparison of CHAMP climate records 2002 to 2008 from six data centers. Journal of Geophysical Research, 117, D18111.
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Pavelyev, A. G.; Liou, Y. A.; Zhang, K.; Wang, C. S.; Wickert, J.; Schmidt, T.; Gubenko, V. N.; Pavelyev, A. A.; Kuleshov, Y. (2012): Identification and localization of layers in the ionosphere using the eikonal and amplitude of radio occultation signals. Atmospheric Measurement Techniques, 5, 1, 1-16.
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Ploeger, F.; Konopka, P.; Müller, R.; Fueglistaler, S.; Schmidt, T.; Manners, J. C.; Grooß, J.-U.; Günther, G.; Forster, P. M. (2012): Horizontal transport affecting trace gas seasonality in the Tropical Tropopause Layer (TTL). Journal of Geophysical Research, 117, D09303.
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Semmling, M.; Schmidt, T.; Wickert, J.; Schön, S.; Fabra, F.; Cardellach, E.; Rius, A. (2012): On the Retrieval of the Specular Reflection in GNSS Carrier Observations for Ocean Altimetry. Radio Science, 47, 6, RS2018.
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Alexander, P.; de la Torre, A.; Llamedo, P.; Hierro, R.; Schmidt, T.; Faber [Haser], A.; Wickert, J. (2011): A method to improve the determination of wave perturbations close to the tropopause by using a digital filter. Atmospheric Measurement Techniques, 4, 9, 1777-1784.
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Beyerle, G.; Grunwaldt, L.; Heise, S.; Köhler, W.; König, R.; Michalak, G.; Rothacher, M.; Schmidt, T.; Wickert, J.; Tapley, B. D.; Giesinger, B. (2011): First results from the GPS atmosphere sounding experiment TOR aboard the TerraSAR-X satellite. Atmospheric Chemistry and Physics, 11, 13, 6687-6699.
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Khandu, J.; Awange, L.; Wickert, J.; Schmidt, T.; Sharifi, M. A.; Heck, B.; Fleming, K. (2010): GNSS remote sensing of the Australian tropopause. Climatic Change, 105, 3-4, 597-618.
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Schmidt, T.; Wickert, J.; Faber [Haser], A. (2010): Variability of the upper troposphere and lower stratosphere observed with GPS radio occultation bending angles and temperatures. Advances in Space Research, 46, 2, 150-161.
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Ho, S.-P.; Kirchengast, G.; Leroy, S.; Wickert, J.; Mannucci, A. J.; Stiner, A. K.; Hunt, D.; Schreiner, W.; Sokolovskiy, S.; Ao, C. O.; Borsche, M.; von Engeln, A.; Foelsche, U.; Heise, S.; Iijima, B.; Kuo, Y.-H.; Kursinski, R.; Pirscher, B.; Ringer, M.; Rocken, C.; Schmidt, T. (2009): Estimating the Uncertainty of using GPS Radio Occultation Data for Climate Monitoring: Inter-comparison of CHAMP Refractivity Climate Records 2002-2006 from Different Data Centers. Journal of Geophysical Research, 114, D23107.
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Wickert, J.; Michalak, G.; Schmidt, T.; Beyerle, G.; Cheng, C. Z.; Healy, S. B.; Heise, S.; Huang, C. Y.; Jakowski, N.; Köhler, W.; Mayer, C.; Offiler, D.; Ozawa, E.; Pavelyev, A. G.; Rothacher, M.; Tapley, B.; Arras, C. (2009): GPS radio occultation: results from CHAMP, GRACE and FORMOSAT-3/COSMIC. Terrestrial Atmospheric and Oceanic Sciences, 20, 1, 35-50.
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Bender, M.; Dick, G.; Wickert, J.; Schmidt, T.; Song, S.; Gendt, G.; Ge, M.; Rothacher, M. (2008): Validation of GPS slant delays using water vapour radiometers and weather models. Meteorologische Zeitschrift, 17, 6, 807-812.
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Heise, S.; Wickert, J.; Beyerle, G.; Schmidt, T.; Smit, H.; Cammas, J. P.; Rothacher, M. (2008): Comparison of Water Vapour and Temperature Results From GPS Radio Occultation Aboard CHAMP With MOZAIC Aircraft Measurements. IEEE Transactions on Geoscience and Remote Sensing, 46, 11, 3406-3411.
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Pavelyev, A. G.; Liou, Y. A.; Wickert, J.; Pavelyev, A. A.; Schmidt, T.; Igarashi, K.; Matyugov, S. S. (2008): Location of layered structures in the ionosphere and atmosphere by use of GPS occultation data. Advances in Space Research, 42, 1, 224-228.
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Schmidt, T.; Wickert, J.; Heise, S.; Flechtner, F.; Fagiolini, E.; Schwarz, G.; Zenner, L.; Gruber, T. (2008): Comparison of ECMWF analyses with GPS radio occultations from CHAMP. Annales Geophysicae, 26, 11, 3225-3234.
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Foelsche, U.; Borsche, M.; Steiner, A.K.; Gobiet, A.; Pirscher, B.; Kirchengast, G.; Wickert, J.; Schmidt, T. (2007): Observing upper troposphere-lower stratosphere climate with radio occultation data from the CHAMP satellite. Climate Dynamics, 31, 1, 49-65.
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Fröhlich, K.; Schmidt, T.; Ern, M.; Preusse, P.; de la Torre, A.; Wickert, J.; Jacobi, Ch. (2007): The global distribution of gravity wave energy in the lower stratosphere derived from GPS data and gravity wave modelling: Attempt and challenges. Journal of Atmospheric and Solar-Terrestrial Physics, 69, 17-18, 2238-2248.
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de la Torre, A.; Schmidt, T.; Wickert, J. (2006): A global analysis of wave potential energy in the lower stratosphere derived from 5 years of GPS radio occultation data with CHAMP. Geophysical Research Letters, 33, L24809.
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Pavelyev, A. G.; Wickert, J.; Liou, Y. A.; Reigber, C.; Schmidt, T.; Igarashi, K.; Pavelyev, A. A.; Matyugov, S. S. (2005): Different mechanisms of the ionospheric influence on GPS occultation signals. GPS Solutions, 9, 2, 96-104.
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Pavelyev, A. G.; Wickert, J.; Schmidt, T.; Reigber, C.; Matyugov, S. S.; Pavelyev, A. A.; Liou, Y. A.; Igarashi, K. (2005): Effect of Solar Activity in Late October 2003 on Radio occultation Signals from the CHAMP German Satellite. Geomagnetism and Aeronomy, 45, 1, 134-139.
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Wang, D. Y.; Clarmann, T. von; Fischer, H.; Funke, B.; Gil-López, S.; Glatthor, N.; Grabowski, U.; Höpfner, M.; Kaufmann, M.; Kellmann, S.; Kiefer, M.; Koukouli, M. E.; Linden, A.; López-Puertas, M.; Mengistu Tsidu, G.; Milz, M.; Steck, T.; Stiller, G. P.; Simmons, A. J.; Dethof, A.; Swinbank, R.; Marquardt, C.; Jiang, J. H.; Romans, L.; Wickert, J.; Schmidt, T.; Ill, R. J.; Remsberg, E. (2005): Validation of stratospheric temperatures measured by Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) on Envisat. Journal of Geophysical Research, 110, D8, D08301.
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Wickert, J.; Beyerle, G.; König, R.; Heise, S.; Grunwaldt, L.; Michalak, G.; Reigber, C.; Schmidt, T. (2005): GPS radio occultation with CHAMP and GRACE: A first look at a new and promising satellite configuration for global atmospheric sounding. Annales Geophysicae, 23, 3, 653-658.
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Beyerle, G.; Wickert, J.; Schmidt, T.; Reigber, C. (2004): Atmospheric sounding by global navigation satellite system radio occultation: An analysis of the negative refractivity bias using CHAMP observations. Journal of Geophysical Research, 109, D01106.
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Schmidt, T.; Wickert, J.; Marquardt, C.; Beyerle, G.; Reigber, C.; Galas, R.; König, R. (2004): GPS radio occultation with CHAMP: an innovative remote sensing method of the atmosphere. Advances in Space Research, 33, 7, 1036-1040.
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Wang, D. Y.; Stiller, G. P.; v. Clarmann, T.; Fischer, H.; Lopez-Puertas, M.; Funke, B.; Gil-Lopez, S.; Glatthor, N.; Höpfner, M.; Kellmann, S.; Tsidu, G. M.; Milz, M.; Steck, T.; Jiang, J. H.; Ao, C. O.; Manney, G.; Hocke, K.; Wu, D. L.; Romans, L. J.; Wickert, J.; Schmidt, T. (2004): Cross-validation of MIPAS/ENVISAT and GPS-RO/CHAMP temperature profiles. Journal of Geophysical Research, 109, D19311.
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Wickert, J.; Pavelyev, A. G.; Liou, Y. A.; Schmidt, T.; Reigber, C.; Igarashi, K.; Pavelyev, A. A.; Matyugov, S. (2004): Amplitude variations in GPS signals as a possible indicator of ionospheric structures. Geophysical Research Letters, 31, L24801.
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Wickert, J.; Reigber, C.; Beyerle, G.; König, R.; Schmidt, T.; Grunwaldt, L.; Galas, R.; Meehan, T.; Melbourne, W. G.; Hocke, K. (2001): Atmosphere sounding by GPS radio occultation: First Results from CHAMP. Geophysical Research Letters, 28, 17, 3263-3266.
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Wickert, J.; Schmidt, T. (2005): Fernerkundung der mittleren Atmosphäre mit GPS-Radiookkultation. promet, 31, 1, 50-52.
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Arras, C.; Wickert, J.; Jacobi, C.; Beyerle, G.; Heise, S.; Schmidt, T. (2013): Global Sporadic E Layer Characteristics Obtained from GPS Radio Occultation Measurements. - In: Lübken, F.-J. (Eds.), Climate and weather of the sun-earth system (CAWSES) : highlights from a priority program, Springer, 207-222.
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Ern, M.; Arras, C.; Faber, A.; Fröhlich, K.; Jacobi, Ch.; Kalisch, S.; Krebsbach, M.; Preusse, P.; Schmidt, T.; Wickert, J. (2013): Observations and Ray Tracing of Gravity Waves: Implications for Global Modeling. - In: Lübken, F.-J. (Eds.), Climate and weather of the sun-earth system (CAWSES) : highlights from a priority program, Springer, 383-408.
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Zenner, L.; Gruber, T.; Beutler, G.; Jäggi, A.; Flechtner, F.; Schmidt, T.; Wickert, J.; Fagiolini, E.; Schwarz, G.; Trautmann, T. (2012): Using atmospheric uncertainties for GRACE de-aliasing - first results. - In: Kenyon, S.; Pacino, M. C.; Marti, U. (Eds.), Geodesy for Planet Earth : Proceedings of the 2009 IAG Symposium, Buenos Aires, Argentina, 31 August 31 - 4 September 2009, Springer, 147-153.
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Beyerle, G.; Arras, C.; Heise, S.; Schmidt, T.; Wickert, J. (2010): GPS-Radiookkultation mit dem CHAMP-Satelliten. - In: Gathen, P. v. d.; Rinke, A.; Neuber, R.; Leutert, B. (Eds.), Polare Atmosphärenforschung in Potsdam : Festschrift anlässlich des 60. Geburtstages von Klaus Dethloff mit Beiträgen von wissenschaftlichen Weggefährten, Alfred-Wegener-Institut für Polar- und Meeresforschung, Forschungsstelle Potsdam, 133-141.
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Chen, J.; Bender, M.; Beyerle, G.; Dick, G.; Falck, C.; Ge, M.; Gendt, G.; Heise, S.; Ramatschi, M.; Schmidt, T.; Stosius, R.; Wickert, J. (2010): GNSS Activities for Natural Disaster Monitoring and Climate Change Detection at GFZ - an Overview. - In: Chuvieco, E.; Li, J.; Yang, X. (Eds.), Advances in Earth Observation of Global Change, Springer, 159-172.
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Schmidt, T.; Wickert, J.; Michalak, G. (2010): The operational processing system for GPS radio occultation data from CHAMP and GRACE. - In: Flechtner, F.; Gruber, T.; Güntner, A.; Mandea, M.; Rothacher, M.; Schöne, T.; Wickert, J. (Eds.), System Earth via Geodetic-Geophysical Space Techniques, Springer, 455-460.
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Wickert, J.; Beyerle, G.; Falck, C.; Healy, S. B.; Heise, S.; Köhler, W.; Michalak, G.; Offiler, D.; Pingel, D.; Ramatschi, M.; Rothacher, M.; Schmidt, T. (2010): Global atmospheric data from CHAMP and GRACE-A: Overview and results. - In: Flechtner, F.; Gruber, T.; Güntner, A.; Mandea, M.; Rothacher, M.; Schöne, T.; Wickert, J. (Eds.), System Earth via Geodetic-Geophysical Space Techniques, Springer, 433-441.
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de la Torre, A.; Alexander, P.; Llamedo, P.; Schmidt, T.; Wickert, J. (2009): New Horizons in Occultation Research. - In: Steiner, A.; Pirscher, B.; Foelsche, U.; Kirchengast, G. (Eds.), New Horizons in Occultation Research : Studies in Atmosphere and Climate, Springer, 151-162.
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de la Torre, A.; Alexander, P.; Llamedo, P.; Schmidt, T.; Wickert, J. (2009): Recent Advances in Gravity Wave Analysis from Long Term Global GPS Radio Occultation Observations. - In: Steiner, A.; Pirscher, B.; Foelsche, U.; Kirchengast, G. (Eds.), New Horizons in Occultation Research : Studies in Atmosphere and Climate, Springer, 151-162.
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Wickert, J.; Schmidt, T.; Michalak, G.; Heise, S.; Arras, C.; Beyerle, G.; Falck, C.; König, R.; Pingel, D.; Rothacher, M. (2009): GPS Radio Occultation with CHAMP, GRACE-A, SAC-C, TerraSAR-X, and FORMOSAT-3/COSMIC: Brief Review of Results from GFZ. - In: Steiner, A.; Pirscher, B.; Foelsche, U.; Kirchengast, G. (Eds.), New Horizons in Occultation Research : Studies in Atmosphere and Climate, Springer, 3-16.
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Neumeyer, J.; Schmidt, T.; Stöber, C. (2007): Improved determination of the atmospheric attraction with 3D air density data and its reduction on ground gravity measurements. - In: Tregoning, P.; Rizos, C. (Eds.), Dynamic planet : monitoring and understanding a dynamic planet with geodetic and oceanographic tools ; IAG Symposium, Cairns, Australia, 22-26 August, 2005, Springer, 541-548.
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Wickert, J.; Beyerle, G.; Falck, C.; Flechtner, F.; Galas, R.; Grunwaldt, L.; Healy, S. B.; Heise, S.; Köhler, W.; König, R.; Massmann, F.-H.; Michalak, G.; Offiler, D.; Pingel, D.; Poli, P.; Ozawa, E.; Rothacher, M.; Schmidt, T.; Tapley, B.; Wergen, W. (2007): Global atmospheric data from CHAMP and GRACE in near-real time. Observations of the System Earth from Space : status seminar, 22 - 23 November 2007, Bavarian Academy of Sciences and Humanities, Munich; Programme & Abstracts, Koordinierungsbüro GEOTECHNOLOGIEN, 36-40.
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Wickert, J.; Gendt, G.; Beyerle, G.; Heise, S.; Helm, A.; Reigber, C.; Schmidt, T.; Jakowski, N.; Jacobi, C. (2007): Ground and Space Based GPS Atmospheric Sounding: Brief Overview and Examples. - In: Anandan, V. K.; Roettger, J.; Rao, D. N. (Eds.), Proceedings of the INTAR colloquium -International Network of Atmosphere Radar-, National Atmospheric Research Laboratory, Gadanki, 1-10.
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Beyerle, G.; Heise, S.; Kaschenz, J.; König-Langlo, G.; Reigber, C.; Schmidt, T.; Wickert, J. (2006): Refractivity biases in GNSS occultation data. - In: Fölsche, U.; Kirchengast, G.; Steiner, A. (Eds.), Atmosphere and climate : studies by occultation methods, Springer, 37-43.
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Bizzarri, B.; Bordi, I.; Dell'Aquila, A.; Petitta, M.; Schmidt, T.; Sutera, A.; Wickert, J. (2006): Analysis of seasonal and daily mid-latitude tropopause pressure using GPS radio occultation data and NCEP-NCAR reanalysis. - In: Foelsche, U.; Kirchengast, G.; Steiner, A. (Eds.), Atmosphere and climate : studies by occultation methods, Springer, 253-263.
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Borsche, M.; Gobiet, A.; Steiner, A. K.; Foelsche, U.; Kirchengast, G.; Schmidt, T.; Wickert, J. (2006): Pre-operational retrieval of radio occultation based climatologies. - In: Foelsche, U.; Kirchengast, G.; Steiner, A. (Eds.), Atmosphere and climate : studies by occultation methods, Springer, 315-323.
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Foelsche, U.; Gobiet, A.; Steiner, A. K.; Borsche, M.; Wickert, J.; Schmidt, T.; Kirchengast, G. (2006): Global Climatologies Based on Radio Occultation Data: The CHAMPCLIM Project. - In: Foelsche, U.; Kirchengast, G.; Steiner, A. (Eds.), Atmosphere and climate : studies by occultation methods, Springer, 303-314.
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Wickert, J.; Beyerle, G.; Schmidt, T.; Healy, S. B.; Heise, S.; Michalak, G.; Rothacher, M. (2006): GPS based atmospheric sounding with CHAMP: Results achieved after four years. Proceedings / The 2005 EUMETSAT Meteorological Satellite Conference : Dubrovnik, Croatia, 19 - 23 September 2005, Eumetsat, 39-47.
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Wickert, J.; Schmidt, T.; Beyerle, G.; Heise, S.; Reigber, C. (2006): Global Atmospheric Sounding with GPS Radio Occultation aboard CHAMP. - In: Flury, J.; Rummel, R.; Reigber, C.; Rothacher, M.; Boedecker, G.; Schreiber, U. (Eds.), Observation of the Earth System from Space, Springer, 55-70.
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Wickert, J.; Schmidt, T.; Beyerle, G.; Michalak, G.; König, R.; Reigber, C.; Heise, S. (2006): GPS radio occultation with CHAMP and GRACE: Recent results. - In: Foelsche, U.; Kirchengast, G.; Steiner, A. (Eds.), Atmosphere and climate : studies by occultation methods, Springer, 3-16.
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Beyerle, G.; Wickert, J.; Schmidt, T.; König, R.; Reigber, C. (2005): An analysis of the lower tropospheric refractivity bias by heuristic sliding spectral methods. - In: Reigber, C.; Lühr, H.; Schwintzer, P.; Wickert, J. (Eds.), Earth observation with CHAMP : Results from Three Years in Orbit, Springer, 507-512.
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Foelsche, U.; Kirchengast, G.; Gobiet, A.; Steiner, A. K.; Löscher, A.; Wickert, J.; Schmidt, T. (2005): The CHAMPCLIM project : An overview. - In: Reigber, C.; Lühr, H.; Schwintzer, P.; Wickert, J. (Eds.), Earth Observation with CHAMP : Results from Three Years in Orbit, Springer, 615-620.
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Helm, A.; Beyerle, G.; Heise, S.; Schmidt, T.; Wickert, J. (2005): The continuous Wavelet Transform, a valuable analysis tool to detect atmospheric and ionospheric signatures in radiooccultation path delay data. - In: Reigber, C.; Lühr, H.; Schwintzer, P.; Wickert, J. (Eds.), Earth Observation with CHAMP - Results from Three Years in Orbit, Springer, 591-596.
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Liou, Y. A.; Wickert, J.; Pavelyev, A.; Reigber, C.; Schmidt, T.; Huang, C. Y.; Yan, S. (2005): Gravity wave 'portrait' reconstructed by radio holographic analysis of the amplitude of GPS radio occultation signals. - In: Reigber, Ch.; Lühr, H.; Schwintzer, P.; Wickert, J. (Eds.), Earth observation with CHAMP : Results from three years in orbit, Springer, 549-554.
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Pavelyev, A. G.; Wickert, J.; Reigber, C.; Schmidt, T.; Liou, Y. A.; Huang, C. Y.; Matyugov, S. S.; Pavelyev, D. A. (2005): Amplitude variations of CHAMP radio occultation data as an indicator of the ionospheric activity. - In: Reigber, C.; Lühr, H.; Schwintzer, P.; Wickert, J. (Eds.), Earth Observation with CHAMP : Results from Three Years in Orbit, Springer, 431-440.
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Pavelyev, A.; Wickert, J.; Liou, Y. A.; Pavelyev, A. A.; Schmidt, T.; Matyugov, S. S. (2005): Results of radio holografic analysis of GPS occultation signals registered during CHAMP and PS/MET small satellites missions. - In: Röser, H.-P.; Sandau, R.; Valenzuela, A. (Eds.), Small satellites for Earth Observation, Wissenschaft und Technik Verl., 35-39.
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Schmidt, T.; Wickert, J.; Beyerle, G.; König, R.; Galas, R.; Reigber, C. (2005): The CHAMP atmospheric processing system for radio occultation measurements. - In: Reigber, C.; Lühr, H.; Schwintzer, P.; Wickert, J. (Eds.), Earth observation with CHAMP : Results from Three Years in Orbit, Springer, 597-602.
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Schmidt, T.; Wickert, J.; Beyerle, G.; Reigber, C. (2005): Tropical Tropopause Characteristics from CHAMP. - In: Reigber, C.; Lühr, H.; Schwintzer, P.; Wickert, J. (Eds.), Earth Observation with CHAMP : Results from Three Years in Orbit, Springer, 561-566.
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Wang, D. Y.; Wickert, J.; Stiller, G.; Clarmann, T. von; Beyerle, G.; Schmidt, T.; Puertas, M. L.; Funke, B.; Gil-Lopez, S.; Glatthor, N.; Grabowski, U.; Höpfner, M.; Kellermann, S.; Kiefer, M.; Linden, A.; Tsidu, G. M.; Milz, M.; Steck, T.; Fischer, H.; Reigber, C. (2005): Comparisons of MIPAS/ENVISAT and GPS-RO/CHAMP temperature profiles. - In: Reigber, C.; Lühr, H.; Schwintzer, P.; Wickert, J. (Eds.), Earth Observation with CHAMP : Results from Three Years in Orbit, Springer, 567-572.
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Wickert, J.; Gobiet, A.; Beyerle, G.; Steiner, A. K.; Kirchengast, G.; Foelsche, U.; Schmidt, T. (2005): GPS radio occultation with CHAMP: Comparison of inversion results from GFZ Potsdam and IGAM Graz. - In: Reigber, Ch.; Lühr, H.; Schwintzer, P.; Wickert, J. (Eds.), Earth Observation with CHAMP : Results from Three Years in Orbit, Springer, 525-530.
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Wickert, J.; Schmidt, T.; Beyerle, G.; Michalak, G.; König, R.; Kaschenz, J.; Reigber, C. (2005): Atmospheric profiling with CHAMP: Status of the operational data analysis, validation of the recent data products and future prospects. - In: Reigber, C.; Lühr, H.; Schwintzer, P.; Wickert, J. (Eds.), Earth observation with CHAMP : Results from Three Years in Orbit, Springer, 495-500.
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Marquardt, C.; Schöllhamer, K.; Beyerle, G.; Schmidt, T.; Wickert, J.; Reigber, C. (2003): Validation and data quality of CHAMP radio occultation data.. - In: Reigber, C.; Lühr, H.; Schwintzer, P. (Eds.), First CHAMP mission results for gravity, magnetic and atmospheric studies, Springer, 384-396.
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Wickert, J.; Beyerle, G.; Schmidt, T.; König, R.; Reigber, C.; Marquardt, C. (2003): Highlights of CHAMP atmospheric occultation results. OIST-4 proceedings : 4th OERSTED International Science Team Conference, Copenhagen, 23-27 September 2002, Danish Meteorological Institute, 235-240.
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Wickert, J.; Beyerle, G.; Schmidt, T.; Marquardt, C.; König, R.; Grunwaldt, L.; Reigber, C. (2003): GPS Radio Occultation with CHAMP. - In: Reigber, C.; Lühr, H.; Schwintzer, P. (Eds.), First CHAMP Mission Results for Gravity, Magnetic and Atmospheric Studies, Springer-Verlag, 371-383.
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Beyerle, G.; Reigber, C.; Galas, R.; Grunwaldt, L.; König, R.; Marquardt, C.; Meehan, T. K.; Schmidt, T.; Wickert, J.; Yunck, T. P. (2002): Radio occultation results and lessons learnt from the CHAMP mission. Proceedings / The 2002 EUMETSAT Meteorological Satellite Conference : Dublin, Ireland, 02 - 06 September 2002, Eumetsat, 107-114.
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Wickert, J.; Reigber, C.; Beyerle, G.; König, R.; Marquardt, C.; Schmidt, T.; Meehan, T.; Grunwaldt, L.; Galas, R. (2002): GPS radio occultation with CHAMP : Initial results. Proceedings of the International Beacon Satellite Symposium : Boston, 3 - 6 June, 2001 (available on CD), 59-62.
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Wickert, J.; Schmidt, T.; Marquardt, C.; Reigber, C.; Neumayer, K.-H.; Beyerle, G.; Galas, R.; Grunwaldt, L. (2002): GPS radio occultation with CHAMP : First results and status of the experiment. - In: Ádám, J. (Eds.), Vistas for geodesy in the new millennium : IAG 2001 scientific assembly, Budapest, Hungary, September 2-7, 2001, 273-278.
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Heise, S.; Wickert, J.; Arras, C.; Beyerle, G.; Bender, M.; Chen, J.; Deng, Z.; Dick, G.; Falck, C.; Ge, M.; Gendt, G.; Faber, A.; Ramatschi, M.; Schmidt, T.; Semmling, M.; Stosius, R. (2012): GPS-basierte Atmosphärenfernerkundung am GFZ: Beobachtungsverfahren und Anwendungen. SORACAL-Meeting (Potsdam, Germany 2012).
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Schmidt, T.; Heise, S.; Michalak, G.; Beyerle, G.; Zus, F.; Wickert, J.; Faber, A.; de la Torre, A.; Alexander, P. (2012): Upper tropospheric and lower stratospheric variability observed with GPS radio occultation data since 2001: Results from CHAMP, GRACE, TerraSAR-X, and FORMOSAT-3/COSMIC. International Radio Occultation Working Group (IROWG) 2nd Workshop (Boulder 2012).
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Wickert, J.; Arras, C.; Bartsch, M.; Beyerle, G.; Bender, M.; Deng, Z.; Dick, G.; Falck, C.; Ge, M.; Gendt, G.; Heise, S.; Michalak, G.; Ramatschi, M.; Schmidt, T.; Semmling, M. (2012): GPS/Galileo Earth Observation at GFZ: Recent activities and results. International Symposium and Summer School on Space Geodesy and Earth System (SGES2012) (Shanghai, China 2012).
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Wickert, J.; Beyerle, G.; Falck, C.; Grunwaldt, L.; Heise, S.; Ramatschi, M.; Stege, S.; Schmidt, T.; Semmling, M.; Zus, F. (2012): GNSS radio occultation at GFZ: Recent results and activities related to future missions. Sixth FORMOSAT-3/COSMIC Data Users' Workshop (Boulder, Colorado 2012).
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Arras, C.; Jacobi, C.; Wickert, J.; Heise, S.; Schmidt, T. (2011): Global observation and analysis of sporadic E layers detected using GPS radio occultation measurements from CHAMP, GRACE and FORMOSAT-3/COSMIC. 5th FORMOSAT-3 / COSMIC Data User Workshop (Taipei, Taiwan 2011).
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Steiner, A. K.; Ho, S.-P.; Hunt, D.; Kirchengast, G.; Mannucci, A. J.; Scherllin-Pirscher, B.; Gleisner, H.; von Engeln, A.; Schmidt, T.; Ao, C.; Leroy, S. S.; Foelsche, U.; Kuo, Y.-H.; Kursinski, E. R.; Lauritsen, K. B.; Syndergaard, S.; Marquardt, C.; Rocken, C.; Schreiner, W.; Sokolovskiy, S.; Wickert, J. (2011): Structural Uncertainty of the CHAMP RO Climate Record from Different Data Centers. 5th FORMOSAT-3 / COSMIC Data Users Workshop and International Conference on GPS Radio Occultation (ICGPSRO) (Taipei, Taiwan 2011).
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Steiner, A. K.; Hunt, D.; Ho, S. P.; Kirchengast, G.; Mannucci, A. J.; Scherllin-Pirscher, B.; Gleisner, H.; von Engeln, A.; Schmidt, T.; Ao, C. O.; Leroy, S. S.; Foelsche, U.; Kuo, Y.-H.; Kursinski, E. R.; Lauritsen, K. B.; Syndergaard, S.; Gorbunov, M.; Marquardt, C.; Rocken, C.; Schreiner, W. S.; Sokolovskiy, S. V.; Wickert, J. (2011): Towards Earth System Data Records from GPS Radio Occultation: Assessing Structural Uncertainty. AGU 2011 Fall Meeting (San Francisco 2011).
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Wickert, J.; Arras, C.; Bartsch, M.; Beyerle, G.; Bender, M.; Deng, Z.; Dick, G.; Falck, C.; Ge, M.; Gendt, G.; Heise, S.; Michalak, G.; Ramatschi, M.; Schmidt, T.; Semmling, M. (2011): GPS remote sensing: Recent results from GFZ. 25th IUGG General Assembly (Melbourne 2011).
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Wickert, J.; Arras, C.; Beyerle, G.; Bender, M.; Dick, G.; Ge, M.; Gendt, G.; Heise, S.; Schmidt, T.; Semmling, M.; Zus, F. (2011): GNSS based Earth Observation: Recent activities at GFZ. APSG Workshop on Space Geodesy and Its Applications for Geosciences and Space Exploitation (Melbourne, Australia 2011).
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Wickert, J.; Arras, C.; Beyerle, G.; Falck, C.; Flechtner, F.; Förste, C.; Grunwaldt, L.; Faber [Haser], A.; Heise, S.; Jakowski, N.; Köhler, W.; König, R.; Lühr, H.; Massmann, F.-H.; Meehan, T.; Michalak, G.; Reigber, C.; Schmidt, T.; Zus, F. (2011): In Memoriam CHAMP: The pathfinder for operational GPS radio occultation. 5th FORMOSAT-3 / COSMIC Data Users Workshop & ICGPSRO 2011 (Taipei, Taiwan 2011).
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Wickert, J.; Arras, C.; Beyerle, G.; Ge, M.; Flechtner, F.; Healy, S. B.; Heise, S.; Huan, C. Y.; Kuo, B.; Marquardt, C.; Michalak, G.; Jakowski, N.; Schmidt, T.; Semmling, M. (2011): Radio occultation with navigation satellites: Recent results and prospects with Galileo. 3rd Galileo Science Colloquium (Copenhagen 2011).
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Wickert, J.; Beyerle, G.; Arras, C.; Falck, C.; Faber [Haser], A.; Heise, S.; Grunwaldt, L.; Koehler, W.; König, R.; Massmann, F.-H.; Michalak, G.; Ramatschi, M.; Schmidt, T.; Zus, F. (2011): Global atmosphere sounding with TerraSAR-X GPS radio occultation: Status and recent results, Poster. 4th TerraSAR-X Science Team Meeting (Oberpfaffenhofen 2011).
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Zus, F.; Beyerle, G.; Heise, S.; Schmidt, T.; Wickert, J. (2011): Validation of refractivity profiles derived from METOP and TerraSAR-X open-loop data. 5th FORMOSAT-3 / COSMIC Data Users Workshop and International Conference on GPS Radio Occultation (ICGPSRO) (Taipei, Taiwan 2011).
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Arras, C.; Beyerle, G.; Faber [Haser], A.; Heise, S.; Michalak, G.; Schmidt, T.; Semmling, M.; Stosius, R.; Wickert, J.; Zus, F. (2010): Radio occultation at GFZ: Recent activities. GRAS-SAG Meeting, EUMETSAT (Darmstadt 2010).
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Heise, S.; Arras, C.; Beyerle, G.; Falck, C.; Faber [Haser], A.; Köhler, W.; Michalak, G.; Schmidt, T.; Wickert, J.; Zus, F. (2010): GPS radio occultation at GFZ: Status and recent results from GRACE. GRACE Science Team Meeting (Potsdam 2010).
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Schmidt, T.; Wickert, J.; Faber [Haser], A.; Heise, S. (2010): Variability of the upper troposphere and lower stratosphere observed with GPS radio occultation bending angles and temperatures. General Assembly European Geosciences Union (Vienna, Austria 2010).
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Steiner, A. K.; Ho, S.-P.; Hunt, D.; Kirchengast, G.; Mannucci, A. J.; Scherllin-Pirscher, B.; Gleisner, H.; von Engeln, A.; Schmidt, T.; Ao, C.; Leroy, S. S.; Foelsche, U.; Kuo, Y.-H.; Kursinski, E. R.; Lauritsen, K. B.; Syndergaard, S.; Marquardt, C.; Rocken, C.; Schreiner, W.; Sokolovskiy, S.; Wickert, J. (2010): Structural Uncertainty of the CHAMP Climate Record from Different Data Centers. OPAC 2010 - Joint OPAC-4 & GRAS SAF Climate Workshop (Graz 2010).
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Wickert, J.; Arras, C.; Beyerle, G.; Faber [Haser], A.; Heise, S.; Michalak, G.; Schmidt, T.; Semmling, M.; Stosius, R.; Zus, F. (2010): GPS remote sensing: Recent results from GFZ. International Beacon Satellite Symposium (Barcelona 2010).
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Wickert, J.; Arras, C.; Beyerle, G.; Grunwaldt, L.; Faber [Haser], A.; Heise, S.; Michalak, G.; Schmidt, T.; Semmling, M.; Stosius, R.; Zus, F. (2010): GNSS radio occultation at GFZ: Recent results and activities. OPAC 2010 - Joint OPAC-4 & GRAS SAF Climate Workshop (Graz 2010).
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Beyerle, G.; Grunwaldt, L.; Heise, S.; Köhler, W.; Schmidt, T.; Choi, K.-R.; Michalak, G.; König, R.; Rothacher, M.; Wickert, J. (2009): First results from the GPS atmospheric remote sensing experiment TOR aboard TerraSAR-X. General Assembly European Geosciences Union (Vienna, Austria 2009).
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Chen, J.; Bender, M.; Beyerle, G.; Dick, G.; Falck, C.; Ge, M.; Gendt, G.; Heise, S.; Ramatschi, M.; Schmidt, T.; Stosius, R.; Wickert, J. (2009): GNSS Activities for Natural Disaster Monitoring and Climate Change Detection at GFZ. 2nd Conference on Earth Observation for Global Changes (EOGC2009) (Chengdu, China 2009).
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Heise, S.; Beyerle, G.; Grunwaldt, L.; Köhler, W.; Schmidt, T.; Choi, K.-R.; Michalak, G.; König, R.; Rothacher, M.; Wickert, J. (2009): First results from the GPS atmospheric remote sensing experiment TOR aboard TerraSAR-X. 24th Meeting of the ESA/EUMETSAT GNSS Receiver for Atmospheric Sounding Science Advisory Group (GRAS-SAG) (Darmstadt, Germany 2009).
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Schmidt, T.; de la Torre, A.; Heise, S.; Wickert, J. (2009): A global analysis of gravity wave activity in the upper troposphere and lower stratosphere region derived from GPS radio occultation data. IAMAS/IAPSO/IACS 2009 Joint Assembly (Montreal, Canada 2009).
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Schmidt, T.; Heise, S.; Wickert, J. (2009): Trends in the global tropopause estimated from CHAMP GPS radio occultation data. IAMAS/IAPSO/IACS 2009 Joint Assembly (Montreal, Canada, 2009).
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Schmidt, T.; Wickert, J.; Faber [Haser], A.; de la Torre, A.; Alexander, P.; Heise, S.; Beyerle, G. (2009): Observing the upper troposphere and lower stratosphere with GPS radio occultation data: Results from CHAMP, GRACE, TerraSAR-X, and FORMOSAT-3/COSMIC. 4th FORMOSAT-3/COSMIC Data Users Workshop ( Boulder, USA 2009).
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Wickert, J.; Arras, C.; Bender, M.; Beyerle, G.; Chen, J.; Dick, G.; Ge, M.; Heise, S.; Helm, A.; Rothacher, M.; Ramatschi, M.; Schmidt, T.; Stosius, R. (2009): GNSS atmosphere sounding at GFZ : Overview and recent results. International Technical Meeting on GNSS ( (ITM-GNSS) (Beijing 2009).
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Wickert, J.; Arras, C.; Brieß, K.; Beyerle, G.; Falck, C.; Grunwaldt, L.; Helm, A.; Herfort, M.; Heise, S.; Köhler, W.; Massmann, F. H.; Michalak, G.; Schmidt, T.; Stosius, R. (2009): GPS radio occultation at GFZ: Recent activities and plans. International Workshop GPS Radio Occultation, NASA/JPL (Pasadena 2009).
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Arras, C.; Wickert, J.; Jacobi, C.; Heise, S.; Beyerle, G.; Schmidt, T.; Rothacher, M. (2008): Sporadic E layer climatology derived from CHAMP, GRACE and COSMIC radio occultations – initial results from GFZ Potsdam. 12th International Symposium on Equatorial Aeronomy - ISEA (Heraklion, Crete, Greece 2008).
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Flechtner, F.; Wickert, J.; Schmidt, T.; Meyer, U. (2008): Influence of assimilated radio occultation data on ECMWF-forced short-term non-tidal atmospheric mass variations. 4th Asian Space Conference & FORMOSAT-3/COSMIC International Workshop (Taipei, Taiwan 2008).
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Poli, P.; Beyerle, G.; Schmidt, T.; Wickert, J. (2008): Assimilation of GPS radio occulation measurements at Météo-France. ECMWF/GRAS SAF joint workshop on 'The assimilation of GPS radio-occultation (GPS RO) measurements', ECMWF (Reading, UK 2008).
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Wickert, J.; Arras, C.; Ao, C. O.; Beyerle, G.; Falck, C.; Grunwaldt, L.; Healy, S. B.; Heise, S.; Helm, A.; Huang, C. Y.; Jakowski, N.; König, R.; Mannucci, T.; Mayer, C.; Michalak, G.; Rothacher, M.; Schmidt, T.; Stosius, R.; Tapley, B. (2008): Tapley CHAMP, GRACE, SAC-C, TerraSAR-X/Tandem-X, Science results, status and future prospects. ECMWF/GRAS SAF joint workshop on 'The assimilation of GPS radio-occultation (GPS RO) measurements', ECMWF (Reading, UK 2008).
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Wickert, J.; Arras, C.; Bender, M.; Beyerle, G.; Dick, G.; Heise, S.; Helm, A.; Schmidt, T.; Stosius, R.; Rothacher, M. (2008): Water vapor measurements using GPS: Recent activities at GFZ Potsdam. International PGGM-IAGOS Workshop (Taipeh 2008).
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Wickert, J.; Arras, C.; Beyerle, G.; Dick, G.; Heise, S.; Helm, A.; Ramatschi, M.; Schmidt, T.; Stosius, R.; Rothacher, M. (2008): GPS Atmosphere Sounding at GFZ: Overview and comparison of CHAMP data with MOZAIC. International PGGM-IAGOS Workshop (Taipeh 2008).
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Wickert, J.; Arras, C.; Beyerle, G.; Falck, C.; Grunwaldt, L.; Helm, A.; Heise, S.; Köhler, W.; König, R.; Michalak, G.; Ramatschi, M.; Rothacher, M.; Schmidt, T.; Stosius, R. (2008): GPS radio occultation: Recent results from GFZ. 4th Asian Space Conference (Taipeh 2008).
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Wickert, J.; Arras, C.; Beyerle, G.; Falck, C.; Grunwaldt, L.; Helm, A.; Heise, S.; Köhler, W.; König, R.; Michalak, G.; Ramatschi, M; Rothacher, M.; Schmidt, T.; Stosius, R. (2008): GPS radio occultation: Recent activities at GFZ. 4th Asian Space Conference & FORMOSAT-3/COSMIC International Workshop (Taipei, Taiwan 2008).
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Wickert, J.; Beyerle, G.; Arras, C.; Choi, K. R.; Falck, C.; Heise, S.; Grunwaldt, L.; Köhler, W.; Massmann, F. H.; Michalak, G.; Ramatschi, M.; Rothacher, M.; Schmidt, T.; Tapley, B. (2008): GPS radio occultation with TerraSAR-X: Introduction, status and initial results. 3rd TerraSAR-X Science Team Meeting (München 2008).
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de la Torre, A.; Schmidt, T.; Wickert, J. (2007): A long period (2001-2007) wave activity global analysis in the troposphere-stratosphere system, from GPS RO CHAMP temperature data. General Assembly European Geosciences Union (EGU) (Vienna, Austria 2007).
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Helm, A.; Wickert, J.; Beyerle, G.; Schmidt, T.; Heise, S.; Stosius, R.; Sobolev, S. V.; Babeyko, A. Y.; Rothacher, M.; Yudanov, S.; Ashjaee, J.; Chen, R.; Rocken, C. (2007): New GNSS Remote Sensing Opportunities with ACES. ACES IWG Meeting (Paris 2007).
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Wickert, J.; Beyerle, G.; Cheng, F. Z.; Healy, S.; Heise, S.; Michalak, G.; Rocken, C.; Rothacher, M.; Schmidt, T.; Viehweg, C.; Tapley, B. (2007): Global atmospheric sounding using GPS radio occultation: Recent results from CHAMP, GRACE and COSMIC/FORMOSAT-3 (solicited). General Assembly European Geosciences Union (EGU) (Vienna, Austria 2007).
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Wickert, J.; Michalak, G.; Schmidt, T.; Beyerle, G.; Falck, C.; Galas, R.; Heise, S.; Healy, S.; Viehweg, C.; Flechtner, F.; Grunwaldt, L.; Köhler, W.; König, R.; Massmann, F.-H.; Offiler, D.; Rhodin, A.; Reigber, C.; Rothacher, M.; Tapley, B. (2007): GPS radio occultation: Operational sounding of the atmosphere with GRACE. General Assembly European Geosciences Union (EGU) (Vienna, Austria 2007).
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Wickert, J.; Michalak, G.; Schmidt, T.; Beyerle, G.; Falck, C.; Heise, S.; Viehweg, C.; Flechtner, F.; Grunwaldt, L.; Köhler, W.; König, R.; Massmann, F.-H.; Pingel, D.; Rothacher, M.; Tapley, B. (2007): GPS radio occultation with GRACE: Recent results from GFZ. Joint International GSTM and DFG SPP Symposium (Potsdam 2007).
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de la Torre, A.; Schmidt, T.; Wickert, J. (2006): A Global Analysis of Wave Potential Energy in the Lower and Middle Atmosphere, from GPS Radio Occultation Long Term Data. 3rd General Assembly European Geosciences Union (Vienna, Austria 2006).
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Ern, M.; Krebsbach, M.; Preusse, P.; Fröhlich, K.; Hoffmann, P.; Jacobi, C.; Schmidt, T.; Wickert, J. (2006): GW-CODE: Gravity wave coupling processes and their decadal variation. Abstracts / 4th Workshop on Long-Term Changes and Trends in the Atmosphere, 4th IAGA/ICMA/CAWSES Workshop on Long-Term Changes and Trends in the Atmosphere (Sodankylä, Finland 2006), 32.
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Foelsche, U.; Borsche, M.; Gobiet, A.; Steiner, A. K.; Lackner, B. C.; Pirscher, B.; Kirchengast, G.; Wickert, J.; Schmidt, T. (2006): Global climatologies based on RO data from CHAMP and FORMOSAT-3/COSMIC. First Formosat-3/COSMIC Data Users Workshop (Boulder, Colorado U.S.A 2006).
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Foelsche, U.; Borsche, M.; Gobiet, A.; Steiner, A. K.; Lackner, B.; Pirscher, B.; Wickert, J.; Schmidt, T.; Kirchengast, G. (2006): Climatologies of the global atmosphere based on radio occultation data from CHAMP. 3rd General Assembly European Geosciences Union (Vienna, Austria 2006).
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Schmidt, T.; Beyerle, G.; Heise, S.; Wickert, J.; Rothacher, M. (2006): Global climatologies of multiple tropopauses and gravity wave activity in the lower stratosphere with a five year GPS radio occultation data set from CHAMP. COST 723 Final Workshop (Sofia, Bulgaria 2006).
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Wickert, J.; Beyerle, G.; Cheng, F.; Healy, S. B.; Heise, S.; Huang, C. Y.; Michalak, G.; Offiler, D.; Rothacher, M.; Schmidt, T.; Viehweg, Ch.; Tapley, B. (2006): GPS radio occultation: News from CHAMP and GRACE, initial results from COSMIC/Formosat-3 data analysis. AGU 2006 Fall Meeting (San Francisco, USA 2006).
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Wickert, J.; Beyerle, G.; Falck, C.; Flechtner, F.; Galas, R.; Grunwaldt, L.; Healy, S.; Heise, S.; Köhler, W.; König, R.; Massmann, F.-H.; Michalak, G.; Offiler, D.; Rhodin, A.; Rothacher, M.; Schmidt, T.; Wergen, W. (2006): Global atmospheric data from CHAMP and GRACE in near-real time. GEOTECHNOLOGIEN Statusseminar 'Observation the system Earth from Space' (Bonn 2006).
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Wickert, J.; Beyerle, G.; Heise, S.; Schmidt, T.; Michalak, G.; König, R.; Jakowski, N.; Rothacher, M.; Typley, B. (2006): GPS radio occultation with CHAMP and GRACE: Overview, recent results and outlook to Metop. First EPS/MetOp RAO Workshop (Frascati, Italy 2006).
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Wickert, J.; Michalak, G.; Schmidt, T.; Beyerle, G.; Heise, S.; Viehweg, C.; Cheng, C. Z.; Flechtner, F.; Grunwaldt, L.; Healy, S.; König, R.; Massmann, F.-H.; Offiler, D.; Rhodin, A.; Reigber, C.; Rothacher, M.; Tapley, B. (2006): Global atmospheric data from GRACE: First results and status. GRACE Science Team Meeting (San Francisco, USA 2006).
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Wickert, J.; Michalak, G.; Schmidt, T.; Beyerle, G.; Heise, S.; Viehweg, Ch.; Aparicio, J.; Cheng, C. Z.; Healy, S. B.; Huang, C. Y.; Ozawa, E.; Offiler, D.; Rothacher, M.; Tapley, B. (2006): GPS radio occultation: Overwiev on CHAMP and GRACE results. FORMASAT-3/COSMIC-Workshop (Taipei, Taiwan 2006).
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Wickert, J.; Schmidt, T.; Michalak, G.; Healy, S. B.; Beyerle, G.; Falck, C.; Galas, R.; Heise, S.; Köhler, W.; Rothacher, M.; Offiler, D.; Wergen, W. (2006): GPS based atmospheric sounding with CHAMP: near real time provision of occultation data for numerical weather prediction. 3rd General Assembly European Geosciences Union (Vienna, Austria 2006).
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Foelsche, U.; Gobiet, A.; Steiner, A. K.; Kirchengast, G.; Borsche, M.; Pirscher, B.; Lackner, B.; Schmidt, T.; Wickert, J. (2005): Towards Benchmark Climatologies of the Global Atmosphere with Radio Occultation Data from CHAMP. AGU 2005 Fall Meeting (San Francisco, USA 2005).
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Schmidt, T.; Beyerle, G.; Wickert, J. (2005): Global temperature monitoring of the upper troposphere and lower stratosphere region with GPS radio occultations. IAMAS (Beijing, China 2005).
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Wickert, J.; Beyerle, G.; Schmidt, T.; Heise, S.; Jakowski, N.; König, R.; Rothacher, M.; Healy, S. B.; Offiler, D.; Wergen, W. (2005): GPS based atmospheric sounding with CHAMP: Recent GFZ activities and results. Second GPS RO Data Users Workshop (Lansdowne, Virginia 2005).
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Wickert, J.; Schmidt, T.; Beyerle, G.; Heise, S.; Flechtner, F.; Galas, R.; Grunwaldt, L.; König, R.; Massmann, F.-H.; Meehan, T.; Reigber, C.; Rothacher, M.; Tapley, B. (2005): GPS radio occultation with CHAMP and GRACE: Preliminary results. GRACE Science Team Meeting ( Austin, Texas 2005).
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Wickert, J.; Gendt, G.; Reigber, C.; Beyerle, G.; Dick, G.; Heise, S.; Jacobi, C.; Ramatschi, M.; Rhodin, A.; Schmidt, T.; Tomassini, M.; Wergen, W. (2004): Boden- und satellitengestützte GPS-Meteorologie in Deutschland: Ergebnisse und Ausblick. DACH Meteorologentagung (Karlsruhe 2004).
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Wickert, J.; Schmidt, T.; Beyerle, G.; Jakowski, N.; Heise, S.; Reigber, C.; König, R. (2004): GPS based atmosphere sounding with CHAMP: Overview, results and future prospects. 7th Latin-American Conference on Space Geophysics (Atibaia, São Paulo, Brazil).
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Wickert, J.; Schmidt, T.; Beyerle, G.; Reigber, C.; Grunwaldt, L.; König, R.; Galas, R.; Heise, S.; Ramatschi, M. (2004): Three years of space based atmosphere sounding with CHAMP: Results, highlights and future prospects. Joint CHAMP/GRACE Science Meeting (Potsdam 2004).
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Reigber, C.; Gendt, G.; Wickert, J.; Beyerle, G.; Dick, G.; Galas, R.; König, R.; Ramatschi, M.; Schmidt, T.; Tomassini, M. (2003): Demonstration of GPS atmospheric monitoring from ground and space within the german GASP project. 23rd General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Sapporo, Japan 2003).
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Wickert, J.; Ao, C. O.; Schreiner, W. B.; Schmidt, T.; Beyerle, G.; König, R.; Reigber, C.; Hajj, G. A.; Iijima, B. A.; Hunt, D.; Sokolovskiy, S.; Rockern, C. (2003): GPS radio occultation with CHAMP: First comparisons of occultation, Data analysis results from GFZ, JPL and UCAR. EGS-AGU-EUG Joint Assembly (Nice 2003).
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Wickert, J.; Schmidt, T.; Beyerle, G.; König, R.; Reigber, C. (2003): GPS radio occultation with CHAMP: Status, results and future prospects of the operational data analysis. URSI F/G Special Symposium on Atmospheric Remote Sensing using Satellite Navigation Systems (Matera, Italy 2003).
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Marquardt, C.; Schöllhammer, K.; Schrödter, M.; Tomassini, M.; Beyerle, G.; Schmidt, T.; Wickert, J.; König, R.; Grunwaldt, L.; Reigber, C. (2002): Validation of 1 year of CHAMP radio occultation data. 27th General Assembly European Geophysical Society (EGS) (Nice 2002).
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Beyerle, G.; Wickert, J.; Schmidt, T.; Marquardt, C.; Reigber, C. (2001): Observations of temperature and water vapour profiles by GPS radio occultation: activities at GeoForschungsZentrum Potsdam. International Workshop on Wind and Temperature Measurement by Radio and Optical Remote Sensing & The 3rd US/Japan Meeting on Mesopause Gravity Waves and Sprite Studies (Kyoto, Japan 2001).
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Wickert, J.; Reigber, C.; Beyerle, G.; König, R.; Marquardt, C.; Schmidt, T.; Meehan, T.; Grunwaldt, L.; Galas, R. (2001): Initial Results of CHAMP Radio Occultation Experiment. AGU Spring Meeting, A31C-08.
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Wickert, J.; Arras, C.; Bender, M.; Beyerle, G.; Chen, J.; Dick, G.; Ge, M.; Heise, S.; Helm, A.; Rothacher, M.; Ramatschi, M.; Schmidt, T.; Stosius, R. (2009): GNSS atmosphere sounding at GFZ: Overview and recent results.
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Schmidt, T. (2008): Das Prozessierungssystem für GPS-Radiookkultationen am GFZ und Anwendungen für Wettervorhersage und Klima.
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Wickert, J.; Arras, C.; Bender, M.; Beyerle, G.; Dick, G.; Heise, S.; Helm, A.; Ramatschi, M.; Rothacher, M.; Schmidt, T.; Stosius, R. (2008): GNSS Atmosphere Sounding: Recent activities at GFZ Potsdam.
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Wickert, J.; Arras, C.; Bender, M.; Beyerle, G.; Dick, G.; Heise, S.; Helm, A.; Ramatschi, M.; Schmidt, T.; Stosius, R.; Rothacher, M. (2008): GNSS Atmosphere Sounding: Recent activities at GFZ Potsdam.
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Wickert, J.; Arras, C.; Bender, M.; Beyerle, G.; Dick, G.; Heise, S.; Helm, A.; Ramatschi, M.; Schmidt, T.; Stosius, R.; Rothacher, M. (2008): GPS Atmosphere Sounding at GFZ: Overview and recent activities.
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Wickert, J.; Arras, C.; Bender, M.; Beyerle, G.; Dick, G.; Heise, S.; Helm, A.; Schmidt, T.; Stosius, R.; Rothacher, M. (2008): GNSS Atmosphere Sounding: Recent activities at GFZ Potsdam.
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Wickert, J.; Bender, M.; Beyerle, G.; Dick, G.; Gendt, G.; Grunwaldt, L.; Heise, S.; Helm, A.; Michalak, G.; Rothacher, M.; Schmidt, T.; Stosius, R.; Viehweg, Ch. (2007): GNSS atmospheric sounding and reflectometry.
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Wickert, J.; Beyerle, G.; Dick, G.; Gendt, G.; Heise, S.; Helm, A.; Michalak, G.; Rothacher, M.; Schmidt, T.; Stosius, R.; Viehweg, Ch. (2006): Atmospheric sounding and reflectometry with GNSS.
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Wickert, J.; Beyerle, G.; Dick, G.; Gendt, G.; Heise, S.; Helm, A.; Michalak, G.; Schmidt, T.; Viehweg, C. (2006): GNSS basierte Fernerkundung: Visionen, Ideen und Fragen.
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Helm, A.; Barthelmes, F.; Beyerle, G.; Bohm, M.; Kaban, M. K.; Magnussen, S.; Reigber, C.; Schwintzer, P.; Schmidt, R.; Schmidt, T.; Schöne, T.; Wickert, J. (2005): Wie hoch sind die Wellen? - Meeres- und Wellenhöhen aus reflektierten GPS-Signalen bestimmen. Kopernikus-Gymnasium.
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Helm, A.; Barthelmes, F.; Beyerle, G.; Bohm, M.; Kaban, M. K.; Magnussen, S.; Reigber, C.; Schwintzer, P.; Schmidt, R.; Schmidt, T.; Schöne, T.; Wickert, J. (2005): Wie hoch sind die Wellen? Meer rausholen aus GPS.
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Helm, A.; Beyerle, G.; Bohm, M.; Michajljow, W.; Reigber, C.; Schwintzer, P.; Schmidt, R.; Schmidt, T.; Schöne, T.; Wetzel, H.-U.; Wickert, J. (2005): Meer rausholen aus GPS. Deutsche Meteorologische Gesellschaft (DMG) ; Geoforschungszentrum Potsdam.
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Schmidt, T. (2005): Fernerkundung der Atmosphäre mit GPS-Radiookkultationen.
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Schmidt, T. (2005): Fernerkundung der Atmosphäre mit GPS-Radiookkultationen.
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Schmidt, T. (2005): Tropopausenklimatologien und Schwerewellen.
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Schmidt, T. (2005): Tropopausenklimatologien und Schwerewellen.
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