Alexander Kehm, Dipl.-Ing.

Deutsches Geodätisches Forschungsinstitut und
Lehrstuhl für Geodätische Geodynamik (Prof. Seitz)

Postadresse
Arcisstr. 21
80333 München

Tel.: +49 (89) 23031-1294
Fax.: +49 (89) 23031-1240
alexander.kehm@tum.de

Research Area

Satellite Laser Ranging, Regional reference frames

Academic Career

  • since 08/2015, Research associate at Deutsches Geodätisches Forschungsinstitut (DGFI-TUM), Munich, Germany
  • 09/2013 - 12/2013, Visiting student at University of Calgary, Canada
  • 03/2012 - 01/2015, Graduate studies of "Geomatics Science" at Technische Universität Graz, Austria (degree: Dipl.-Ing.)
  • 10/2008 ­- 10/2011, Undergraduate studies of "Bauingenieurwesen und Geodäsie" at Technische Universität Darmstadt, Germany (degree: B.Sc.)

Functions/Memberships

International Association of Geodesy (IAG)

  • Global Geodetic Observing System (GGOS) Working Group on Performance Simulations and Architectural Trade-Offs (PLATO), Member (since 2016)

International Laser Ranging Service (ILRS)

  • Analysis Standing Committee, Member (since 2018)

Publications

2019

Bloßfeld M., Kehm A., Rudenko S.: The ILRS AC at DGFI-TUM. In: (Eds.), ILRS Bi-annual Report 2016-2018, 2019
Hellmers H., Thaller D., Bloßfeld M., Kehm A., Girdiuk A.: Combination of VLBI Intensive Sessions with GNSS for generating Low latency Earth Rotation Parameters. Advances in Geosciences, 50, 49–56, 10.5194/adgeo-50-49-2019, 2019 (Open Access)
Kehm A., Bloßfeld M., König P., Seitz F.: Future TRFs and GGOS – where to put the next SLR station?. Advances in Geosciences, 50, 17–25, 10.5194/adgeo-50-17-2019, 2019 (Open Access)

2018

Bloßfeld M., Rudenko S., Kehm A., Panafidina N., Müller H., Angermann D., Hugentobler U., Seitz M.: Consistent estimation of geodetic parameters from SLR satellite constellation measurements. Journal of Geodesy, 92(9), 1003–1021, 10.1007/s00190-018-1166-7, 2018
Männel B. Thaller D., Rothacher M., Böhm J., Müller J., Glaser S., Dach R., Biancale R., Bloßfeld M., Kehm A., Herrera Pinzon I., Hofmann F., Andritsch F., Coulot D., Pollet A.: Recent Activities of the GGOS Standing Committee on Performance Simulations and Architectural Trade-Offs (PLATO). In: (Eds.), International Association of Geodesy Symposia, 10.1007/1345_2018_30, 2018

2017

Kehm A., Bloßfeld M., Pavlis E. C., Seitz F.: Future global SLR network evolution and its impact on the terrestrial reference frame. Journal of Geodesy, 92(6), 625–635, 10.1007/s00190-017-1083-1, 2017

2012

Mendoza L., Kehm A., Koppert A., Dávila J.M., Gárate J., Becker M.: The Lorca Earthquake observed by GPS: A Test Case for GPS Seismology. Física de la Tierra 24 (2012): 129–150, 10.5209/rev_FITE.2012.v24.40135, 2012

Posters/Presentations

2019

Bloßfeld M. Jäggi A., Kehm A., Meyer U., Sosnica K.: Evaluating the potential of combined SLR gravity field solutions. COST-G Team Meeting, Bern, Switzerland, 2019-01-15
Bloßfeld M., Kehm A.: Status report of the DGFI-TUM ILRS AC. ILRS Analysis Standing Committee Meeting, Vienna, Austia, 2019-04-06
Bloßfeld M., Kehm A.: The potential of increased station performances for scientific SLR products. ILRS Technical Workshop 2019, Stuttgart, Germany, 2019-10-23
Hellmers H., Thaller D., Bloßfeld M., Kehm A., Girdiuk A.: VLBI/GNSS Rapid combination for generating Earth Orientation Parameters. European Geosciences Union General Assembly 2019, Vienna, Austria, 2019-04-10 (Poster)
Hellmers H., Thaller D., Bloßfeld M., Kehm A., Girdiuk A.: Kombination von VLBI Intensive Sessions mit GNSS zur Bestimmung von Erdrotationsparametern mit kurzer Latenzzeit. Frontiers of Geodetic Science 2019, Stuttgart , 2019-09-18
Kehm A.: Data analysis demonstration – data download and normal point computation. First One-Day Introductory and Refresher Course on Satellite and Lunar Laser Ranging, Stuttgart, Germany, 2019-10-20
Kehm A., Bloßfeld M., Hellmers H., Dill R., Dobslaw H.: ESA-EOP software for final and rapid combination and prediction. Implementation Review meeting to ESA project "Independent Generation of Earth Orientation Parameters" (ESA-EOP), Frankfurt am Main, 2019-10-18
Kehm A., König P., Bloßfeld M., Seitz F.: Simulation studies on the location of a future SLR site. GGOS PLATO Standing Committee Meeting, Vienna, Austria, 2019-04-08
Kehm A., Sánchez L., Bloßfeld M., Angermann D., Drewes H., Seitz F.: Combination strategies for the realization of an Epoch Reference Frame for South America. European Geosciences Union General Assembly 2019, Vienna, Austria, 2019-04-09
Seitz F., Kehm A., König P., Bloßfeld M.: Future TRFs and GGOS – Where to put the next SLR station?. European Geosciences Union General Assembly 2019, Vienna, Austria, 2019-04-10 (Poster)
Thaller D., Männel B., Glaser S., Kehm A., Bloßfeld M.: Recent Activities of the GGOS Standing Committee on Performance Simulations and Architectural Trade-Offs (PLATO). Implementation of the Global Geodetic Reference Frame (GGRF) in Latin America, Buenos Aires, Argentina, 2019-09-19
Thaller D., Männel B., Glaser S., Rothacher M., Herrera Pinzón I., Bloßfeld M., Kehm A., Andritsch F., Dach R., Böhm J., Pavlis E. C., Pollet A.: The GGOS Standing Committee on Performance Simulations and Architectural Trade-Offs (PLATO). 27th IUGG General Assembly, Montreal, Kanada, 2019-07-11

2018

Bloßfeld M., Jäggi A., Kehm A., Meyer U., Sosnica K.: Evaluating the potential of combined SLR gravity field solutions. 21st International Workshop on Laser Ranging, Canberra, Australia, 2018-11-05
Bloßfeld M., Kehm A.: Simulation studies for Satellite Laser Ranging at DGFI-TUM. GGOS Standing Commitee PLATO meeting, Vienna, Austria, 2018-04-10
Bloßfeld M., Kehm A.: Definition of the interface between rapid and final combination and common software layout. Progress meeting 2a to ESA project ``Independent Generation of Earth Orientation Parameters'' , 2018-05-16
Bloßfeld M., Kehm A.: Preliminary assessment of EOP combination using ESA products. Progress meeting 2a to ESA project ``Independent Generation of Earth Orientation Parameters'', 2018-05-16
Bloßfeld M., Kehm A., Angermann D.: Determining 'essential' geodetic variables using Satellite Laser Ranging. AGU Fall Meeting, Washington D.C., USA, 2018-12-12
Bloßfeld M., Kehm A., Rudenko S.: Status report of the DGFI-TUM ILRS AC. 21st International Workshop on Laser Ranging - ILRS Analysis Standing Committee meeting, Canberra, Australia, 2018-11-04
Bloßfeld M., Kehm A., Rudenko S., Angermann D.: The Role of Laser Ranging for the Global Geodetic Observing System GGOS. 21st International Workshop on Laser Ranging, Canberra, Australia, 2018-11-05
Bloßfeld M., Kehm A., Thaller D.: Konsistente Verknüpfung der Raumverfahren. FGS Workshop, Bad Kötzting, 2018-06-14
Kehm A., Bloßfeld M.: ESA-EOP product contributions (model inventory): current status/ESA contribution to the ILRS: comparison between the ILRS Analysis Centers. Progress Meeting 2 to ESA project "Independent Generation of Earth Orientation Parameters", 2018-02-19
Kehm A., Bloßfeld M.: EOP combination scenario and software design. Progress Meeting 2 to ESA project "Independent Generation of Earth Orientation Parameters", 2018-02-19
Kehm A., Bloßfeld M.: ESA-EOP combination scenarios and software design. Progress Meeting 3 to ESA project "Independent Generation of Earth Orientation Parameters", 2018-08-21
Kehm A., Bloßfeld M., König P., Angermann D., Seitz F.: Satellite Laser Ranging und sein Potential für das Globale Geodätische Beobachtungssystem GGOS – ein Blick in die Zukunft. Geodätische Woche 2018, Frankfurt am Main, 2018-10-16
Kehm A., Bloßfeld M., Seitz F.: Extension of the SLR tracking network and its potential for the realization of Terrestrial Reference Frames. 21st International Workshop on Laser Ranging, Canberra, Australia, 2018-11-05
Kehm A., Bloßfeld M., Seitz F.: Optimization of the current SLR tracking network: potential for SLR-derived reference frames. 21st International Workshop on Laser Ranging, Canberra, Australia, 2018-11-06
König P., Kehm A., Bloßfeld M., Seitz F.: Erweiterung des Bodensegments von Satellite Laser Ranging (SLR) – Realisierung einer Simulationsstudie. Geodätische Woche 2018, Frankfurt am Main, 2018-10-16
Rudenko S., Bloßfeld M., Dettmering D., Kehm A.,Zeitlhöfler J., Angermann D.: Impact of various models on orbits of Jason satellites. 42nd COSPAR Scientific Assembly, Pasadena, CA, United States of America, 2018-07-16

2017

Bloßfeld M., Rudenko S., Kehm A., Panafidina N., Angermann D., Seitz M.: DGFI part of project PN 6: status report. Status seminar DFG Research Unit FOR1503, Munich, 2017-02-17
Bloßfeld M., Rudenko S., Kehm A., Panafidina N., Müller H., Göttl F., Angermann D., Hugentobler U., Seitz M.: Estimation of consistent fundamental geodetic parameters based on SLR satellite constellation measurements. AGU Fall meeting, New Orleans, USA, 2017-12-11
Bloßfeld M., Rudenko S., Kehm A., Panafidina N., Müller H., Göttl F., Angermann D., Hugentobler U., Seitz M.: Consistent estimation of station coordinates, Earth orientation parameters and selected low degree Earth's gravity field coefficients from SLR measurements. Ocean Surface Topography Science Team (OSTST) Meeting, Miami, Florida, USA, 2017-10-24
Göttl F., Bloßfeld M., Kehm A., Schmidt M., Seitz F.: Towards uncertainties in gravimetrically derived excitation mechanisms of Earth rotation: A case study of degree-1 Stokes coefficients and C20. EGU General Assembly 2017, Vienna, Austria, 2017-04-24 (Poster)
Göttl F., Bloßfeld M., Kehm A., Schmidt M., Seitz F.: Determination of accuracy information for effective angular momentum functions derived from gravity field observations. IAG-IASPEI Joint Scientific Assembly, 2017-07-31 (Poster)
Kehm A.: ESA EOP model inventory: processing standards. PDR Meeting to ESA project "Independent Generation of Earth orientation parameters", Munich, Germany, 2017-01-22
Kehm A., Bloßfeld M., Panafidina N., Rudenko S., Müller H., Angermann D., Hugentobler U., Seitz M.: Konsistente Schätzung geodätischer Parameter mit Satellite Laser Ranging. Geodätische Woche 2017, Berlin, 2017-09-27
Kehm A., Bloßfeld M., Seitz F.: E-GRASP and SLR: Impact of an additional orbit on SLR-derived low-degree Stokes coefficients. E-GRASP science team meeting, Vienna, Austria, 2017-04-26
Kehm A., Bloßfeld M., Seitz F.: Future evolution of the SLR ground and space segments and its impact on the estimation of TRF, EOP and Stokes coefficients. GGOS PLATO standing commitee meeting, Vienna, Austria, 2017-04-27
Kehm A., Bloßfeld M., Seitz F.: Evolution of the SLR ground and space segments and its potential for GGOS. General Assembly 2017, Vienna, Austria, 2017-04-25 (Poster)
Kehm A., Bloßfeld M., Seitz F.: Future evolution of the SLR ground segment and its impact on the estimation of TRF and EOP. IGOS Workshop, Wettzell, Germany, 2017
Matsuo K., Otsubo T., Bloßfeld M., Kehm A., Müller H.: SLR contributions to time-variable gravity field and thermospheric neutral density estimates. 2017 ILRS Technical Workshop, Riga, Latvia, 2017
Rudenko S., Bloßfeld M., Müller H., Dettmering D., Angermann D., Kehm A.: Validation of DTRF2014, ITRF2014 and JTRF2014 by precise orbit determination of SLR and altimetry satellites. European Geosciences Union General Assembly 2017, Vienna, Austria, 2017-04-25 (Poster)

2016

Bloßfeld M., Müller H., Kehm A., Angermann D.: A comparison of ITRF2014, DTRF2014 and JTRF2014 using SLR. AGU Fall Meeting 2016, San Francisco, CA, 2016-12-15 (Poster)
Kehm A., Bloßfeld M., Pavlis E., Seitz F.: Future global SLR network evolution and its impact on the terrestrial reference frame. EGU General Assembly, Vienna, Austria, 2016
Kehm A., Bloßfeld M., Pavlis E., Seitz F.: Future global SLR network evolution and its impact on the terrestrial reference frame. GGOS PLATO Working Group Meeting, Vienna, Austria, 2016
Kehm A., Bloßfeld M., Seitz F.: Verbesserungspotential für die Realisierung geodätischer Referenzrahmen durch ein weiterentwickeltes globales SLR-Stationsnetz. Geodätische Woche 2016, Hamburg, 2016-10-11

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