Finished Research Projects

  • 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