Inhaltsbereich
Publication
(Co) Author: Helm, A.
| Paper (ISI journals) [11] |
Chapter in Book [7] |
Conference Paper [56] |
Thesis/Habil [1] |
Miscellaneous [14] |
All [89] |
-
(2011): Changes in effective stress during the 2003-2004 Ubaye seismic swarm, France. Journal of Geophysical Research, 116, B01309.
-
(2011): Detection of Arctic Ocean tides using interferometric GNSS-R signals. Geophysical Research Letters, 38, L04103.
-
(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.
-
(2008): Sub-debris melt rates on southern Inylchek Glacier, central Tian Shan. Geografiska Annaler, Series A: Physical Geography, 90, 1, 55-63.
-
(2008): Turf-bearing topsoils on the central Tibetan Plateau, China: Pedology, botany, geochronology. Catena, 73, 3, 300-311.
-
(2008): Post-drainage ice dam response at Lake Merzbacher, Inylchek glacier, Kyrgyzstan. Geografiska Annaler, Series A: Physical Geography, 90, 1, 87-96.
-
(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 |
-
(2003): The controls on the composition of biodegraded oils in the deep subsurface––part 1: biodegradation rates in petroleum reservoirs.. Organic Geochemistry, 34, 4, 601-613.
-
(2002): Calibration of the shuttle radar topography mission X-SAR instrument using a synthetic altimetry data model. Canadian Journal of Remote Sensing, 28, 4, 573-580.| EDOC: 4924 | Abstract |
-
(2002): Xanthones - novel aromatic oxygen-containing compounds in crude oils. Organic Geochemistry, 33, 5, 595-609.| EDOC: 3170 | Abstract |
-
(2001): Biodegradation of oil in uplifted basins prevented by deep-burial sterilization. Nature, 411, 6841, 1034-1037.
TOP-
(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.
-
(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 |
-
(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 |
-
(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 |
-
(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.| EDOC: 5761 |
-
(2005): Biodegradation, gas destruction and methane generation in deep subsurface petroleum reservoirs: an overview.. - In: Doré, A. G.; Vining, B. A. (Eds.), Petroleum Geology: North-West Europe and Global Perspectives - Proceedings of the 6th Petroleum Geology Conference, Geological Society, 1-1690.| EDOC: 6003 |
-
(2000): Altimetrie und Meeresspiegel. Zweijahresbericht Geoforschungszentrum Potsdam 1998/1999, GeoForschungsZentrum Potsdam, 13-27.| EDOC: 17197 |
-
(2010): Reflected GPS L1/L2 observations used for Sea Ice remote sensing and altimetry. AGU 2010 Fall Meeting (San Francisco, USA 2010).| EDOC: 16497 |
-
(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 |
-
(2009): Simulation Study on Tsunami Detection from Space Using GNSS-R. General Assembly European Geosciences Union (Vienna, Austria 2009).| EDOC: 13134 |
-
(2009): GNSS Reflectometry as Tsunami Detection System from Space: A Simulation Study. Abstracts, Geodätische Woche 2009 (Karlsruhe, Rheinstetten 2009), 76.| EDOC: 14700 |
-
(2009): GNSS atmosphere sounding at GFZ : Overview and recent results. International Technical Meeting on GNSS ( (ITM-GNSS) (Beijing 2009).| EDOC: 13823 |
-
(2009): GPS radio occultation at GFZ: Recent activities and plans. International Workshop GPS Radio Occultation, NASA/JPL (Pasadena 2009).| EDOC: 13386 |
-
(2008): GNSS Remote sensing: An opportunity for ACES. International Workshop 'ACES and Future GNSS-based Earth Observation and Navigation' (Munich 2008).| EDOC: 11573 |
-
(2008): GNSS Reflectometry at GFZ. Workshop on 'ACES and Future GNSS-based Earth Observation and Navigation' (München 2008).| EDOC: 11557 |
-
(2008): Using reflected Global Navigation Satellite System signals for remote sensing: Some overview. CEOS WGCV Microwave Sensors Sub-group Meeting (Noordwijk 2008).| EDOC: 10933 |
-
(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 |
-
(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.
-
(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 |
-
(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 |
-
(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 |
-
(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 |
-
(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 |
-
(2008): Galileo on board International Space Station and combination with the ACES Mission. 22nd European Frequency and Time Forum (Toulouse, France 2008).| EDOC: 11561 |
-
(2008): GALILEO on board the International Space Station, the last 5 years. GNSS-R’08 Workshop on GNSS Reflectometry (Noordwijk 2008).| EDOC: 13126 |
-
(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 |
-
(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 |
-
(2008): Water vapor measurements using GPS: Recent activities at GFZ Potsdam. International PGGM-IAGOS Workshop (Taipeh 2008).| EDOC: 11587 |
-
(2008): GPS Atmosphere Sounding at GFZ: Overview and comparison of CHAMP data with MOZAIC. International PGGM-IAGOS Workshop (Taipeh 2008).| EDOC: 11569 |
-
(2008): GPS radio occultation: Recent results from GFZ. 4th Asian Space Conference (Taipeh 2008).| EDOC: 13296 |
-
(2008): GPS radio occultation: Recent activities at GFZ. 4th Asian Space Conference & FORMOSAT-3/COSMIC International Workshop (Taipei, Taiwan 2008).| EDOC: 12173 |
-
(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 |
-
(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 |
-
(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 |
-
(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.
-
(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 |
-
(2007): New GNSS Remote Sensing Opportunities with ACES. ACES IWG Meeting (Paris 2007).| EDOC: 10934 |
-
(2007): GPS for Microsatellites - Status and Perspectives. 6th IAA Symposium on Small Satellites for Earth Observation (Berlin 2007), 1-8.| EDOC: 10688 | Abstract |
-
(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 |
-
(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 |
-
(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 |
-
(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 |
-
(2005): Remote monitoring of lake level heights by ground-based observations of reflected GPS signals. 2nd General Assembly European Geosciences Union (Vienna, Austria 2005).| EDOC: 6868 |
-
(2005): Remote monitoring of ocean heights by ground-based observations of reflected GPS signals: 2 case studies. GNSS Reflection Workshop 2005 (Guildford, UK 2005).| EDOC: 7787 |
-
(2005): Remote monitoring of ocean heights in coastal areas by ground-based observations of reflected GPS signal. 2nd General Assembly European Geosciences Union (Vienna, Austria 2005).| EDOC: 6869 |
-
(2004): Altimetry and reflectometry with CHAMP using coherent GPS signal reflections: A feasibility study. Joint CHAMP/GRACE Science Meeting (Potsdam 2004).| EDOC: 5811 |
-
(2004): Monitoring lake surface height changes with a ground-based GPS reflectometry receiver. 1st General Assembly European Geosciences Union (Nice, France 2004).| EDOC: 5847 |
-
(2003): An online satellite altimetry data processing system: ADS central. 23rd General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Sapporo, Japan 2003).| EDOC: 5848 |
-
(2002): An Online Satellite Altimetry Data Processing System: ADS Central. 27th General Assembly European Geophysical Society (EGS) (Nice France 2002).| EDOC: 6250 |
-
(2001): Steps towards an improved algorithm for ocean near surface wind speeds derived from satellite radar altimeter data. AGU 2001 Fall Meeting (San Fracisco 2001).| EDOC: 5850 |
-
(2001): Calibration of the shuttle radar topography mission X-SAR instrument using altimetry data. 26th General Assembly of the European Geophysical Society (EGS) ( Nice 2001).| EDOC: 5851 |
-
(2001): The controls on the composition of biodegraded oils in the deep subsurface. Some rules of biodegradation. 20th International Meeting on Organic Geochemistry.| EDOC: 3133 |
-
(2001): Biodegradation of crude oils in the petroleum systems offshore Norway: New molecular insights from functionalized petroleuem constituents. Earth System Processes - Global Meeting (Edinburgh 2001).| EDOC: 3136 |
-
(2001): Tracing migration, water washing and biodegradation in the Tampen Spur, offshore Norway, using xanthones, carbazoles and fluorenones. 20th International Meeting on Organic Geochemistry.| EDOC: 3137 |
-
(2001): Palepasteurisation and the base of the biosphere - A petroleum geochemical viewpoint. 20th International Meeting on Organic Geochemistry.| EDOC: 3148 |
-
(2001): Aliphatic and aromatic carboxylic acids in oil field waters: An indicator of anaerobic biodegradation of hydrocarbons in petroleum reservoirs?. 20th International Meeting on Organic Geochemistry (IMOG) (Nancy, France 2001).| EDOC: 3149 |
-
(2000): The ENVISAT RA-2 Value-Added Ocean/Ice Processor at GFZ Potsdam. Proceedings, ERS-ENVISAT Symposium (Gothenburg, Sweden 2000).| EDOC: 2332 |
-
(2000): Meeresspiegeländerungen in Svalbard aus Altimetrie und Pegelmessungen. 60. Jahrestagung der Deutschen Geophysikalischen Gesellschaft ( DGG ) (München 2000).| EDOC: 5853 |
-
(2000): Bestimmung der instantanen Meereshöhe mit synthetischen Altimetrie Daten. 60. Jahrestagung der Deutschen Geophysikalischen Gesellschaft ( DGG ) (München 2000).| EDOC: 5852 |
-
(2000): Oceanographic data product generation at GFZ. 25th General Assembly of the European Geophysical Society (EGS) (Nice, France 2000).| EDOC: 5854 |
-
(2000): Operational altimetry at GFZ - from ERS-2 to Envisat. ERS – ENVISAT Symposium (Gothenburg, Sweden 2000).| EDOC: 5855 |
-
(1999): Calibration of ERS altimetric data in the western Spitsbergen shelf through tide gauge data. EGS Vening Meinesz Conference (Loiro-Porto San Paolo, Italy 1999).| EDOC: 5856 |
-
(1999): Calibration of X-SAR during the Shuttle Radar Topography Mission Using Synthetic Altimeter Data. AGU 1999 Fall Meeting (San Francisco, USA 1999).| EDOC: 2643 |
-
(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.
-
(2009): GNSS atmosphere sounding at GFZ: Overview and recent results.| EDOC: 13825 |
-
(2008): Enabling Technologies.| EDOC: 11496 |
-
(2008): The GITEWS Two Frequency Space Receiver Prototype GORS.| EDOC: 11497 |
-
(2008): GNSS Atmosphere Sounding: Recent activities at GFZ Potsdam.| EDOC: 11565 |
-
(2008): GNSS Atmosphere Sounding: Recent activities at GFZ Potsdam.| EDOC: 11567 |
-
(2008): GPS Atmosphere Sounding at GFZ: Overview and recent activities.| EDOC: 11566 |
-
(2008): GNSS Atmosphere Sounding: Recent activities at GFZ Potsdam.| EDOC: 11588 |
-
(2007): GNSS atmospheric sounding and reflectometry.| EDOC: 10202 |
-
(2006): Atmospheric sounding and reflectometry with GNSS.| EDOC: 10175 |
-
(2006): GNSS basierte Fernerkundung: Visionen, Ideen und Fragen.| EDOC: 9564 |
-
(2005): Wie hoch sind die Wellen? - Meeres- und Wellenhöhen aus reflektierten GPS-Signalen bestimmen. Kopernikus-Gymnasium.| EDOC: 10941 |
-
(2005): Wie hoch sind die Wellen? Meer rausholen aus GPS.| EDOC: 10940 | Abstract |
-
(2005): Meer rausholen aus GPS. Deutsche Meteorologische Gesellschaft (DMG) ; Geoforschungszentrum Potsdam.
-
(2003): DVD: CHAMP a Challenging Mission to Planet Earth.| EDOC: 10669 |