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Dr.-Ing. Basem Elsaka

BE

 Dr.-Ing. Basem Elsaka

  • Funktion:

 Akademischer, administrativer und technischer Mitarbeiter

  • Email:

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  • Telefon:

 +49 228 73-2750

  • Fax:

 +49 228 73-3029

  • Raum:

 2.010

  • Anschrift:

Institut für Geodäsie und Geoinformation

 Nussallee 17

 D-53115 Bonn

Berufliches Profil

  • Seit 2017: Admenstrative und Technische Mitarbeiter am Institut für Geodäsie und Geoinformation (Astronomische Physikalische und Mathematische Geodäsie Gruppe) der Universität Bonn.

  • 20142015: Referent an der King Abdulaziz City for Science and Technology (KACST), Riad, Saudi Arabien.

  • 20102013: Wissenschaftliche Mitarbeiter am Institut für Geodäsie und Geoinformation (Astronomische Physikalische und Mathematische Geodäsie Gruppe) der Universität Bonn.

  • 2010: Ph.D. in Geodäsie, Institut für Geodäsie und Geoinformation (Astronomische Physikalische und Mathematische Geodäsie Gruppe) der Universität Bonn.

  • 20062009: Doktorand am Institut für Geodäsie und Geoinformation (Astronomische Physikalische und Mathematische Geodäsie Gruppe) der Universität Bonn.

  • 2003: M.Sc. in Geophysik, Fakultät für Naturwissenschaften, Universität Helwan, Kairo, Ägypten.

  • 19992005: Wissenschaftliche Mitarbeiter am National-Forschungsinstitut Astronomie und Geophysik, Kairo, Ägypten.

  • 1999: B.Sc. in Geophysik, Fakultät für Naturwissenschaften, Universität Mansoura, El-Mansoura, Ägypten.

Forschungsinteressen

Generell

  • Physikalische und Satellitengeodäsie.

  • Terrestrische Gravimetrie.

Speziell

  • Bestimmung der statischen und zeitlichabhängigen Erdschwerefeldern aus verschiedenen Satellitenformationsflügen, z.B. GRACE, GRACE Follow-On, Multi-GRACE-Typ, Cartwheel-Typ, LISA-Typ, Helix-Typ, Pendel-Typ und Bender-Typ Konstellationen.

  • Optimales Konfigurationsdesign für zukünftige Satelliten-Schwerkraftmissionen (im Low-Low-Satelliten-zu-Satelliten-Tracking-Modus).

  • Modellierung von Geoidhöhen mit Verwendung terrestrischen- und satelliten Schwerefeldesbeobachtungen im Sinne von Least-Squares-Kollokationsansatz und Remove-Compute-Restore Methode.

  • WebDesign mit Plone-System und Betreuung der Seite www.apmg.uni-bonn.de.

  • WebDesign mit Wordpress-System und Betreuung der Seite www.globalcda.de.

Projekte

Auszeichnungen

Funktionen (Auswahl)

Lehre

Publikationen 

  • Saadon, A. Elsaka, B., El-Ashquer, M., El-Fiky, G. (2019) Regional Evaluation of GOCE-Based GGMs with Ground-Based Gravity and GPS/Levelling Data over Egypt. International Journal of Geosciences,10, pp.652–668, doi:10.4236/ijg.2019.106037.

  • El-Ashquer, M., Elsaka, B., El-Fiky, G. (2017) EGY-HGM2016: An Improved Hybrid Local Geoid Model for Egypt based on the Combination of GOCE-based Geopotential Model with Gravimetric and GNSS/Levelling Measurements. Arabian Journal of Geosciences (AJGS), 10(11), doi.org/10.1007/s12517-017-3042-9.

  • El-Ashquer, M., Elsaka, B., El-Fiky, G. (2016) On the Accuracy Assessment of the Latest Releases of GOCE satellite-based Geopotential Models with EGM2008 and Terrestrial GNSS/Levelling and Gravity Data over Egypt. International Journal of Geosciences,7(11), pp.1323–1344, doi:10.4236/ijg.2016.711097.

  •  Alothman, A., Fernandes, R., Bos, M., Schillak, S., Elsaka, B. (2016) Angular Velocity of Arabian Plate from Multi-Year Analysis of GNSS data. Arabian Journal of Geosciences (AJGS),  9(8), doi.org/10.1007/s12517-016-2569-5

  • Alothman, A., Godah, W., Elsaka, B. (2016) Gravity field anomalies from recent GOCE satellite-based geopotential models and terrestrial gravity data: A comparative study over Saudi Arabia. Arabian Journal of Geosciences (AJGS), 9(5), doi.org/10.1007/s12517-016-2393-y.

  • Alothman, A., Elsaka B. (2016) First Release of Gravimetric Geoid Model over Saudi Arabia Based on Terrestrial Gravity and GOCE Satellite Data: KSAG01, Poster in European Geosciences Union, General Assembly 2016, Vienna, Austria, 17–22 April 2016.

  • Elsaka, B., Alothman, A., Godah, W. (2015) On the Contribution of GOCE Satellite-Based GGMs to Improve GNSS/Leveling Geoid Heights Determination in Saudi Arabia. IEEE-JSTARS Journal of Selected Topics in Applied Earth Observations and remote Sensing, 9(12), pp. 5842–5850, doi.10.1109/JSTARS.2015.2495193.

  • Alothman, A, Elsaka, B. (2015) Gravity Field Solution Derived from Recent Releases of GOCE-Based Geopotential Models and Terrestrial Gravity Observations over The Kingdom of Saudi Arabia. Proc. ‘5th International GOCE User Workshop’, 24–28 November 2014 Paris, France (ESA–SP Vol.728, March 2015), doi.2015ESASP.728E..30A.

  • Elsaka, B., Ilk, K.-H., Alothman, A. (2015) Mitigation of Oceanic Tidal Aliasing Errors in Space and Time Simultaneously Using Different Repeat Sub-Satellite Tracks from Pendulum-Type Gravimetric Mission Candidate. Acta Geophysica, 63(1), pp. 301–318, doi.org/10.2478/s11600-014-0251-4

  •  Alothman, A., Feng, W., Fernanded, R., Bos, M., Elsaka B. (2014) Seasonal mass changes in the Red Sea observed by GPS and GRACE, Poster in AGU 2014 Fall Meeting, San Francisco, California, USA, 15 – 19/12/2014. 

  • Alothman, A., Elsaka B. (2014) Gravity field solutions derived from recent GOCE-based geopotential models and insitu gravity observations over Saudi Arabia, Poster in 5th International GOCE User Workshop 25–29 November 2014, UNESCO, Paris, France.

  • Elsaka B., Forootan, E., Kusche, J., Alothman, A. (2014) Regional hydrological recovery using one year of simulated observations of the GRACE and Bender constellations,  Poster in European Geosciences Union (EGU), General Assembly, 27/04 to 02/05/2014 Vienna, Austria.

  • Alothman, A., Grebenitcharsky, R., Elsaka B. (2014) Wavelet Multi-Resolution Analysis for Gravimetric Geoid over Saudi Arabia, Poster in European Geosciences Union (EGU), General Assembly, 27/04 to 02/05/2014 Vienna, Austria.

  • Reubelt, T., Sneeuw, N., Iran Pour, S., Hirth, M., Fichter, W., Müller, J., Brieden, Ph., Flechtner, F., Raimondo, J.-C., Kusche, J., Elsaka, B., Gruber, T., Pail, R., Murböck, M., Doll, B., Sand, R., Wang, X., Klein, V., Lezius, M., Danzmann, K., Heinzel, G., Sheard, B., Rasel, E., Gilowski, M., Schubert, C., Schäfer, W., Rathke, A., Dittus, H. and Pelivan, I. (2014) Future Gravity Field Satellite Missions. Flechtner, F., Sneeuw, N., Schuh, W.-D. (Eds.), Observation of the System Earth from Space - CHAMP, GRACE, GOCE and future missions. GEOTECHNOLOGIEN Science Report No. 20, Series "Advanced Technologies in Earth Sciences"Springer, ISBN 978-3-642-32134-4, doi.org/10.1007/978-3-642-32135-1_21.

  • Elsaka, B. (2014) Feasible Multiple Satellite Mission Scenarios Flying in a Constellation for Refinement of the Gravity Field Recovery. In: International Journal of Geosciences, 5(3), pp. 267–273, doi.10.4236/ijg.2014.53027.

  • Elsaka, B. (2014) Sub-monthly Gravity Field Recovery from Simulated Multi-GRACE Mission Type. Acta Geophysica, 62(1), pp. 241–258, doi.org/10.2478/s11600-013-0170-9.

  • Elsaka, B., Forootan, E., Alothman, A. (2014) Improving the recovery of monthly regional water storage using one year simulated observations of two pairs of GRACE-type satellite gravimetry constellation. Journal of Applied Geophysics, 109, pp. 195–209, doi.org/10.1016/j.jappgeo.2014.07.026.

  • Elsaka, B., Raimondo, J.-C., Brieden, Ph., Reubelt, T., Kusche, J., Flechtner, F., Iran-Pour, S., Sneeuw, N., Müller, J. (2014) Comparing seven candidate mission configurations for temporal gravity field retrieval through full-scale numerical simulation. Journal of Geodesy, 88(1), pp. 31–43, doi.org/10.1007/s00190-013-0665-9.

  • Forootan, E., Didova, O., Schumacher, M., Kusche, J., Elsaka, B. (2014) Comparisons of atmospheric mass variations derived from ECMWF reanalysis and operational fields, over 2003 to 2011. Journal of Geodesy, 88(5), pp. 503–514, doi.org/10.1007/s00190-014-0696-x.

  • Elsaka, B., Kusche, J., Ilk, K.-H. (2012) Recovery of the Earth's gravity field from formation-flying satellites: temporal aliasing issues. Advances in Space Research, 50(11), pp. 1534–1552, doi.org/10.1016/j.asr.2012.07.016.  

  • Elsaka, B., Raimondo, J.-C., Kusche, J., Flechtner, F. (2012) Gravity Field Results from Satellite Mission Scenarios. Poster in Geotechnologien-Abschlussseminar, 24/05/2012, Potsdam, Germany.

  • Raimondo, J.-C., Elsaka, B., Neumayer, K.-H., Flechtner, F., Kusche, J. (2011) Numerical Simulations of new Gravity Mission Concepts. Geotechnologien Status-Seminar „Weltraum Phase III“, 11/10/2011, Stuttgart, Germany.

  •  Elsaka, B., Kusche, J. (2010) Optimized Gravity Field Determination from Future Satellite Missions [WP 110]. Scince Report, Geotechnologien Status-Seminar „Weltraum Phase III“, 04/10/2010, Bonn, Germany.

  • Elsaka, B. (2010) Simulated Satellite Formation Flights for Detecting the Temporal Variations of the Earth's Gravity Field. Ph.D. Dissertation, University of Bonn, hss.ulb.uni-bonn.de/2010/2151/2151.htm

  • Elsaka B., Ilk, K. H., Kusche, J. (2009) Simulated Multiple Formation Flights for Future Gravity Field Recovery, Poster in European Geosciences Union (EGU), General Assembly, 19-24/04/2009 Vienna, Austria.

  • Elsaka B., Ilk, K.-H. (2008) Gravity Field Recovery of the Earth from Simulated Multiple GRACE-Type Missions. Poster in the Geodetic Week, 30/09-02/10/2008 Bremen, Germany.

  • Elsaka, B. (2003) Forth Derivative Analysis of Gravity Data. Master Thesis (M. Sc.), Faculty of Science, Helwan University, Cairo, Egypt.

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