ResearchResearch Projects
Finished Research projects

Finished Research Projects

Terrestrial Gravimetry

Gravity Field and Geoid Modelling

  • German Combined Geoid 2016 (GCG2016)
    Leaders: Dr.-Ing. Heiner Denker
    Team: Dr.-Ing. Heiner Denker
    Year: 2016
  • Regional gravity field modeling & relativistic geodesy (CRC 1128, C04)
    Leaders: Dr.-Ing. Heiner Denker
    Team: Dr.-Ing. Miao Lin
    Year: 2014
    Sponsors: Deutsche Forschungsgemeinschaft (DFG)
    Lifespan: 01.07.2014 – 30.06.2018
  • International Timescales with Optical Clocks (ITOC) /Researcher Excellence Grant (REG) „Gravity Potential for Optical Clock Comparisons“
    Leaders: Dr. Helen S. Margolis, Dr.-Ing. Heiner Denker
    Team: Dr.-Ing. Heiner Denker, Dr.-Ing. Ludger Timmen, Dr.-Ing. Christian Voigt
    Year: 2013
    Sponsors: European Metrology Research Programme (EMRP), jointly funded by the EMRP participating countries within EURAMET and the European Union
    Lifespan: 01.07.2013 – 31.03.2016
  • REaldatenAnaLyse GOCE (REAL GOCE)
    Teilprojekt GOCE Cal/Val, Quasigeoid und Höhensystem in Deutschland
    Leaders: Dr.-Ing. Heiner Denker, Prof. Dr.-Ing. Jürgen Müller (IfE-Anteil WP310)
    Team: Dr.-Ing. Phillip Brieden, Dr.-Ing. Focke Jarecki, Dr.-Ing. Christian Voigt, Dr.-Ing. Karen Insa Wolf
    Year: 2009
    Sponsors: Sonderprogramm GEOTECHNOLOGIEN, gefördert vom Bundesministerium für Bildung und Forschung (BMBF) und der Deutsche Forschungsgemeinschaft (DFG), Förderkennz. 03G0726C
    Lifespan: 01.06.2009 – 31.05.2012
  • Deutsches kombiniertes Quasigeoidmodell GCG05
    Berechnung eines neuen hochauflösenden Quasigeoidmodells für Deutschland mit cm-Genauigkeit.
    Leaders: Dr.-Ing. Heiner Denker
    Team: Dr.-Ing. Heiner Denker
    Year: 2006
  • Europäisches Schwere- und Geoidprojekt (EGGP) der Internationalen Assoziation für Geodäsie
    Leaders: Dr.-Ing. Heiner Denker
    Team: Dr.-Ing. Heiner Denker
    Year: 2005
    Sponsors: IAG International Association of Geodesy
  • GOCE-GRavitationsfeldANalyse Deutschland – GOCE-GRAND II WP220 – Regionales Validierungs- und Kombinationsexperiment
    Within the framework of the project, high-quality validated terrestrial gravity field data sets (in particular deflections of the vertical and gravity data) were generated in Germany and Europe for the external validation of GOCE products. These data were used for the validation of existing satellite gravity models on the one hand and for the calculation of corresponding combined quasigeoid solutions for Germany and Europe on the other hand.
    Leaders: Dr.-Ing. Heiner Denker (WP220 - IfE)
    Team: Dr.-Ing. Christian Voigt
    Year: 2005
    Sponsors: Research and development programme GEOTECHNOLOGIEN, funded by the Federal Ministry of Education and Research (BMBF) and the German Research Foundation (DFG), Förderkennz. 03F0421D
    Lifespan: 01.09.2005 – 31.08.2008
  • Fennoskandische Landhebung
    Ein Test- und Anwendungsgebiet für GRACE
    Leaders: Prof. Dr.-Ing. Jürgen Müller, Dr.-Ing. Ludger Timmen, Dr.-Ing. Heiner Denker
    Team: Dr.-Ing. Olga Gitlein
    Year: 2003
    Sponsors: Deutsche Forschungsgemeinschaft (DFG)
    Lifespan: 15.3.2003 bis 28.2.2009
  • Europäisches Geoidmodell EGG97
    Leaders: Dr.-Ing. Heiner Denker
    Team: Dr.-Ing. Heiner Denker
    Year: 2003
    Sponsors: Deutsche Forschungsgemeinschaft (DFG)
  • Kombination von CHAMP- und regionalen terrestrischen Schwerefelddaten
    Evaluierung und optimalen Kombination verschiedener Schwerefelddatensätze in Europa.
    Leaders: Dr.-Ing. Heiner Denker, Prof. Dr.-Ing. Günter Seeber
    Team: Dr.-Ing. Markus Roland
    Year: 2001
    Sponsors: Deutsche Forschungsgemeinschaft (DFG)
    Lifespan: 01.05.2001 – 30.04.2004

Relativistic Geodesy

Satellite Gravimetry

  • Multi-sensor Climatology onboard GRACE
    The thermosphere lies between the exosphere and the mesosphere. The temperature in this layer can reach up to 4,500 degrees Fahrenheit. The thickness of this layer is about 513 km [NASA, 2018]. The thermosphere is the top level of the Earth atmosphere, located from 100 to 1000 km altitude. At 100 km already, the air density is twelve orders of magnitude lower than at the Earth’s surface. However, the remaining air is enough to exert a significant force on satellites orbiting the Earth at low heights. This perturbation is mainly due to high orbital velocity of 7.5 km/s, and the proportional relation between the air drag and the square of the speed. Since the space-borne accelerometer could measure the total non-conservative accelerations acting on the satellites directly, the air drag component could be isolated with the help of solar and earth albedo radiation pressure models, then the atmospheric density can be estimated, which provides necessary data for making evaluation and improvement of the existing atmospheric models.
    Leaders: Prof. Dr.-Ing. Jakob Flury, Dr.-Ing. Akbar Shabanloui
    Year: 2018
    Lifespan: WiSe 2018/2019
  • European Gravity Service for Improved Emergency Management (EGSIEM)
    Massenänderungen, abgeleitet aus der Mission GRACE (Gravity Recovery And Climate Experiment), liefern grundlegende Einblicke in den globalen Wasserkreislauf der Erde. Änderungen in der kontinentalen Wasser-speicherung steuern den regionalen Wasserhaushalt und können in Extremfällen zu Überschwemmungen und Dürren führen. Das Ziel von EGSIEM ist, den Wasserkreislauf der Erde aus dem Weltall mit hoher zeitlicher und räumlicher Auflösung zu beobachten und vorherzusagen.
    Leaders: Prof. Dr.-Ing. Jakob Flury
    Team: Dr.-Ing. Akbar Shabanloui
    Year: 2015
    Sponsors: European Commission (EC)
    Lifespan: 2015-2017
  • Data analysis challenge for the GRACE-FO community (CRC 1128, B04)
    Leaders: Dr.-Ing. Majid Naeimi, Dr. Martin Hewitson, Dr. Meike List
    Team: Dr. Neda Darbeheshti
    Year: 2015
    Sponsors: DFG
  • Fusion of ranging, accelerometry, and attitude sensing in the multi-sensor system for laserinterferometric inter-satellite ranging (CRC 1128, B02)
    The quality of gravity field results obtained from GRACE and GRACE Follow-On inter-satellite ranging does not only depend on the ranging measurement accuracy. Equally important is the quality of the integration in the multi-sensor system consisting of inter-satellite ranging, GNSS orbit tracking, accelerometry, and attitude sensing, and the performance of this system as a whole. The system performance is influenced, e.g., by star camera attitude performance, by the characteristics of satellite pointing jitter coupling, by inaccurate knowledge and instabilities of phase centers and alignments, and by accelerometer signal disturbances.
    Leaders: Prof. Jakob Flury, Dr. Gerhard Heinzel
    Team: M.Sc. Santoshkumar Burla, Henry Wegener, Dr. Akbar Shabanloui
    Year: 2014
    Sponsors: DFG
    Lifespan: 2014-2018
  • High performance satellite formation flight simulator (CRC 1128, B05)
    Leaders: Dr. Meike List (ZARM), Dr.-Ing. Benny Rievers (ZARM)
    Team: M.Sc. Guy Apelbaum, Dr. Takahiro Kato , Florian Wöske, Dr. Sergiy Svitlov, Dr. rer. nat. Ertan Göklü, Stefanie Bremer
    Year: 2014
    Sponsors: DFG
  • System studies for an optical gradiometer mission (CRC 1128, B07)
    Leaders: Dr. Gerhard Heinzel, Prof. Dr.-Ing. habil. Jürgen Müller
    Team: Dr. Karim Douch, Brigitte Kaune, Dr. Akbar Shabanloui
    Year: 2014
    Sponsors: DFG
  • Massenveränderungen in Sibirischen Permafrost abgeleitet aus GRACE und Satellitenbildern
    Leaders: Prof. Dr.-Ing. Jürgen Müller
    Team: Dr.-Ing. Sibylle Vey
    Year: 2011
  • Zukunftskonzepte für Schwerefeldsatellitenmissionen
    Leaders: Prof. Dr.-Ing. habil. Jürgen Müller
    Team: Dipl.-Ing. Phillip Brieden
    Year: 2011
    Sponsors: BMBF
  • GOCE-GRAND II im BMBF-Geotechnologien-Programm
    Eröffnung neuer Anwendungsfelder in der Geodäsie und in vielen Nachbardisziplinen durch verbesserte Schwerefeldbestimmung.
    Leaders: Prof. Dr.-Ing. Jürgen Müller
    Team: Dipl.-Ing. Karen. I. Wolf, Dipl.-Ing. Focke Jarecki
    Year: 2009
    Sponsors: Bundesministerium für Bildung und Forschung (BMBF) und Deutsche Forschungsgemeinschaft (DFG)
  • REaldatenAnaLyse GOCE (REAL GOCE)
    WP210 – Qualitätsbeurteilung gemessener GOCE-Gradienten (Q-GGG)
    Leaders: Dr.-Ing. Heiner Denker, Prof. Dr.-Ing. Jürgen Müller
    Team: Dr.-Ing. Phillip Brieden, Dr.-Ing. Focke Jarecki, Dr.-Ing. Christian Voigt, Dr.-Ing. Karen Insa Wolf
    Year: 2009
    Sponsors: Sonderprogramm GEOTECHNOLOGIEN, gefördert vom Bundesministerium für Bildung und Forschung (BMBF) und der Deutsche Forschungsgemeinschaft (DFG), Förderkennz. 03G0726C
    Lifespan: 01.06.2009 – 31.05.2012
  • GOCE-GRavitationsfeldANalyse Deutschland – GOCE-GRAND AP6 – Bestimmung äußerer Eichfaktoren und Validierung der Ergebnisse
    The project investigated methods for calibration and validation of GOCE results with external gravity field data.
    Leaders: Prof. Dr.-Ing. Reiner Rummel
    Team: Dr.-Ing. Heiner Denker, Dr.-Ing. Focke Jarecki, Prof. Dr.-Ing. Jürgen Müller, Dr.-Ing. Karen Insa Wolf
    Year: 2002
    Sponsors: Research and development programme GEOTECHNOLOGIEN, funded by the Federal Ministry of Education and Research (BMBF) and the German Research Foundation (DFG)
    Lifespan: 01.01.2002 – 31.12.2004

Antenna Calibration

GNSS and Inertial Navigation

Lunar Laser Ranging (LLR)

Geodetic Astronomy

CRC 1128 (geo-Q)

QUEST

  • Satellite Navigation using high precise Oscillators
    Examination of high precise Oscillators in the application area of Satellite Navigation
    Leaders: Prof. Dr.-Ing. Steffen Schön
    Team: Dipl.-Ing. Ulrich Weinbach
    Year: 2011
    Sponsors: QUEST
  • Potential Field Determination and high precise Oscillators
    Determination of the Earth's Gravity Field using high precise Oscillators
    Leaders: Prof. Dr.-Ing. habil. Jürgen Müller
    Team: Dr.-Ing. habil. Enrico Mai
    Year: 2011
    Sponsors: QUEST (Quantum Engineering and Space Time Research)
  • Highly physical penumbra solar radiation pressure modeling with atmospheric effects
    During penumbra transitions of an Earth orbiter, the solar radiation hitting the satellite is strongly influenced by refraction and absorption of light rays grazing the Earth’s atmosphere. The project implemented solar radiation pressure modeling including these effects. Model results were tested by comparing with measurements of the accelerometers of the GRACE low Earth orbiters.
    Leaders: Prof. Jakob Flury, Tamara Bandikova
    Team: Robbie Robertson (Virginia Tech, Blacksburg, VA)
    Year: 2010
    Sponsors: RISE/QUEST
    Lifespan: 2010
  • Verfeinerte Modellierung des Erde-Mond-Systems im mm-Bereich zur Bestimmung relativistischer Größen
    Leaders: Prof. Dr.-Ing. habil. Jürgen Müller
    Team: Dipl.-Ing. Franz Hofmann
    Year: 2009
    Sponsors: QUEST
  • In-Orbit System Analysis of the Gravity Recovery and Climate Experiment (GRACE) Mission
    Precise determination and control of satellite attitude plays a key role for satellite geodesy in general, and for Satellite-to-Satellite Tracking in particular. The project provided the first in-depth characterization of GRACE pointing biases and pointing variations. Investigations addressed star camera inter-boresight angle variations, the weighted camera sensor head combination, as well as error propagation to inter-satellite ranging and accelerometer observations. Results led to significant improvements in the operational GRACE data processing.
    Leaders: Prof. Jakob Flury
    Team: Tamara Bandikova
    Year: 2009
    Sponsors: Exzellenzcluster QUEST
    Lifespan: 2009-2015
    © IfE / Bandikova