Publications
(Co) Author: Helm, A.
(since 2006) [ All ]
| Paper (ISI journals) [7] |
Chapter in Book [4] |
Conference Paper [35] |
Thesis/Habil [1] |
Miscellaneous [10] |
All [57] |
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(2011): Changes in effective stress during the 2003-2004 Ubaye seismic swarm, France. Journal of Geophysical Research, 116, B01309.
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(2011): Detection of Arctic Ocean tides using interferometric GNSS-R signals. Geophysical Research Letters, 38, L04103.
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(2010): Simulation of space-borne tsunami detection using GNSS-Reflectometry applied to tsunamis in the Indian Ocean. Natural Hazards and Earth System Sciences (NHESS), 10, 6, 1359-1372.
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(2008): Sub-debris melt rates on southern Inylchek Glacier, central Tian Shan. Geografiska Annaler, Series A: Physical Geography, 90, 1, 55-63.
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(2008): Turf-bearing topsoils on the central Tibetan Plateau, China: Pedology, botany, geochronology. Catena, 73, 3, 300-311.
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(2008): Post-drainage ice dam response at Lake Merzbacher, Inylchek glacier, Kyrgyzstan. Geografiska Annaler, Series A: Physical Geography, 90, 1, 87-96.
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(2006): A Lateglacial palaeosol cover in the Altdarss area, southern Baltic Sea coast (Northeast Germany): investigations on pedology, geochronology and botany. Netherlands Journal of Geosciences, 85, 3, 197-220.| EDOC: 20026 |
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(2008): GPS for Microsatellites – Status and Perspectives. - In: Sandau, R.; Röser, H. P.; Valenzuela, A. (Eds.), Small Satellites for Earth Observation : selected contributions; [proceedings of the 6th International Symposium of the International Academy of Astronautics], Springer, 165-174.
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(2007): Visualisierung – eine leistungsfähige Methode für den geowissenschaftlichen Forschungsprozess. Thematische Kartierungen in den Geowissenschaften = Thematic Mapping in Geosciences, Dt. Akad. der Naturforscher Leopoldina, 151-164.| EDOC: 10233 |
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(2007): Natural Hazard Monitoring with reflected GPS signals at Merzbacher Glacier Lake. - In: Seyfert, E. (Eds.), Vorträge Dreiländertagung SGPBF, DGPF und OVG : 27. wissenschaftlich-technische Jahrestagung der DGPF, 19. - 21. Juni 2007 in Muttenz, Basel, DGPF, 505-516.| EDOC: 10645 | Abstract |
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(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.| EDOC: 11026 |
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(2010): Reflected GPS L1/L2 observations used for Sea Ice remote sensing and altimetry. AGU 2010 Fall Meeting (San Francisco, USA 2010).| EDOC: 16497 |
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(2010): Tsunami detection from space using GNSS reflections: results and activities from GFZ. Proceedings, 30th anniversary IGARSS - IEEE International Geoscience and Remote Sensing Symposium (Honolulu, HI, USA 2010), 3047-3050.| EDOC: 16042 |
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(2009): Simulation Study on Tsunami Detection from Space Using GNSS-R. General Assembly European Geosciences Union (Vienna, Austria 2009).| EDOC: 13134 |
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(2009): GNSS Reflectometry as Tsunami Detection System from Space: A Simulation Study. Abstracts, Geodätische Woche 2009 (Karlsruhe, Rheinstetten 2009), 76.| EDOC: 14700 |
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(2009): GNSS atmosphere sounding at GFZ : Overview and recent results. International Technical Meeting on GNSS ( (ITM-GNSS) (Beijing 2009).| EDOC: 13823 |
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(2009): GPS radio occultation at GFZ: Recent activities and plans. International Workshop GPS Radio Occultation, NASA/JPL (Pasadena 2009).| EDOC: 13386 |
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(2008): GNSS Remote sensing: An opportunity for ACES. International Workshop 'ACES and Future GNSS-based Earth Observation and Navigation' (Munich 2008).| EDOC: 11573 |
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(2008): GNSS Reflectometry at GFZ. Workshop on 'ACES and Future GNSS-based Earth Observation and Navigation' (München 2008).| EDOC: 11557 |
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(2008): Using reflected Global Navigation Satellite System signals for remote sensing: Some overview. CEOS WGCV Microwave Sensors Sub-group Meeting (Noordwijk 2008).| EDOC: 10933 |
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(2008): Ground-based water level observations at Lake Walchen with reflected GPS L1 C/A and L2C signals. General Assembly European Geosciences Union (Vienna, Austria 2008).| EDOC: 11250 | Abstract |
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(2008): Utilizing ocean reflected GPS L1 C/A and the new GPS L2C signals for tsunami detection from space:possible small satellite constellations and the GORS instrument. International Conference on Tsunami Warning (ICTW) (Bali, Indonesia 2008), 1-8.
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(2008): GNSS-R carrier phase altimetry with GPS L2C signals and status of the GORS and GORS follow-on space receiver prototypes. GNSS-R’08 Workshop on GNSS Reflectometry (Noordwijk 2008).| EDOC: 12003 | Abstract |
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(2008): The 2005 Lake Merzbacher GLOF event and status of future planned activities in the Tien Shan region. General Assembly European Geosciences Union (Vienna, Austria 2008).| EDOC: 11495 | Abstract |
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(2008): Using Reflected GPS Signals for the Observation of the Second 2005 Lake Merzbacher GLOF Event. International Workshop 'Glacial Lake Outburst Floods in Central Asia - GLOF' (Bishkek, Kyrgyzstan 2008).| EDOC: 11498 | Abstract |
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(2008): Simulation of GNSS-R tsunami detection from space applied to the 2004 Sumatra tsunami event. GNSS-R’08 Workshop on GNSS Reflectometry (Noordwijk 2008).| EDOC: 12649 |
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(2008): GNSS reflectometry simulation studies within GITEWS and comparison between simulated and scanned waveforms at Lake Walchen. General Assembly European Geosciences Union (Vienna, Austria 2008).| EDOC: 11361 |
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(2008): Galileo on board International Space Station and combination with the ACES Mission. 22nd European Frequency and Time Forum (Toulouse, France 2008).| EDOC: 11561 |
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(2008): GALILEO on board the International Space Station, the last 5 years. GNSS-R’08 Workshop on GNSS Reflectometry (Noordwijk 2008).| EDOC: 13126 |
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(2008): Geodesy Part of the ACES Mission: GALILEO on Board the International Space Station. International Workshop 'ACES and Future GNSS-based Earth Observation and Navigation' (Munich 2008).| EDOC: 11574 |
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(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).| EDOC: 11575 |
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(2008): Water vapor measurements using GPS: Recent activities at GFZ Potsdam. International PGGM-IAGOS Workshop (Taipeh 2008).| EDOC: 11587 |
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(2008): GPS Atmosphere Sounding at GFZ: Overview and comparison of CHAMP data with MOZAIC. International PGGM-IAGOS Workshop (Taipeh 2008).| EDOC: 11569 |
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(2008): GPS radio occultation: Recent results from GFZ. 4th Asian Space Conference (Taipeh 2008).| EDOC: 13296 |
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(2008): GPS radio occultation: Recent activities at GFZ. 4th Asian Space Conference & FORMOSAT-3/COSMIC International Workshop (Taipei, Taiwan 2008).| EDOC: 12173 |
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(2007): Using reflected GPS signals for remote sensing: Introduction and results from recent experiments. Workshop New Earth Observation Techniques for Tsunami Detection and Geohazards Monitoring (Jakarta 2007).| EDOC: 10917 |
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(2007): The GNSS Occultation, Reflectometry and Scatterometry Space Receiver Gors: Current Status and Future Plans Within GITEWS. 1st Colloquium Scientific and Fundamental Aspects of the Galileo Programme (Cité de l’Espace, Toulouse, France 2007).| EDOC: 10650 | Abstract |
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(2007): GORS - A GNSS Occultation, Reflectometry and Scatterometry Space Receiver. 20th International Technical Meeting of the Satellite Division of The Institute of Navigation - ION GNSS (Fort Worth, Texas, USA 2007), 2011-2021.| EDOC: 10643 | Abstract |
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(2007): Status of GNSS reflectometry related receiver developments and feasibility studies within the German Indonesian Tsunami Early Warning System. IEEE International Geoscience and Remote Sensing Symposium - IGARSS 2007 (Barcelona, Spain 2007), 5084-5087.
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(2007): The GITEWS GNSS Occultation, Reflectometry and Scatterometry Space Receiver GORS. Workshop New Earth Observation Techniques for Tsunami Detection and Geohazards Monitoring (Jakarta 2007).| EDOC: 10918 |
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(2007): New GNSS Remote Sensing Opportunities with ACES. ACES IWG Meeting (Paris 2007).| EDOC: 10934 |
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(2007): GPS for Microsatellites - Status and Perspectives. 6th IAA Symposium on Small Satellites for Earth Observation (Berlin 2007), 1-8.| EDOC: 10688 | Abstract |
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(2006): Coastal altimetry at the Baltic Sea off-shore Rugen using L1 carrierphase-delay observations of reflected GPS signals at low elevation angles. GNSSR’06 - Workshop on GNSS Reflections (Noordwijk, The Netherlands, 2006), 1-7.| EDOC: 10667 |
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(2006): Remote monitoring of the Baltic Sea surface off-shore Rügen by ground-based observations of reflected GPS signals. 3rd General Assembly European Geosciences Union (Vienna, Austria 2006).| EDOC: 9029 |
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(2006): Monitoring the 2005 dam failure event of Merzbacher glacier lake with ground-based observations of reflected GPS signals. 3rd General Assembly European Geosciences Union (Vienna, Austria 2006).| EDOC: 9033 |
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(2006): Natural hazard monitoring with L1 carrier-phase-delay observations of reflectedGPS signals: The 2005 dam failure event of Merzbacher glacier lake. GNSSR’06 - Workshop on GNSS Reflections (Noordwijk, The Netherlands 2006), 1-8.| EDOC: 10666 | Abstract |
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(2008): Ground-based GPS altimetry with the L1 OpenGPS receiver using carrier phase-delay observations of reflected GPS signals. Scientific Technical Report ; 08/10, Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum - GFZ, 163.
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(2009): GNSS atmosphere sounding at GFZ: Overview and recent results.| EDOC: 13825 |
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(2008): Enabling Technologies.| EDOC: 11496 |
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(2008): The GITEWS Two Frequency Space Receiver Prototype GORS.| EDOC: 11497 |
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(2008): GNSS Atmosphere Sounding: Recent activities at GFZ Potsdam.| EDOC: 11565 |
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(2008): GNSS Atmosphere Sounding: Recent activities at GFZ Potsdam.| EDOC: 11567 |
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(2008): GPS Atmosphere Sounding at GFZ: Overview and recent activities.| EDOC: 11566 |
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(2008): GNSS Atmosphere Sounding: Recent activities at GFZ Potsdam.| EDOC: 11588 |
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(2007): GNSS atmospheric sounding and reflectometry.| EDOC: 10202 |
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(2006): Atmospheric sounding and reflectometry with GNSS.| EDOC: 10175 |
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(2006): GNSS basierte Fernerkundung: Visionen, Ideen und Fragen.| EDOC: 9564 |