NATIONAL AND KAPODISTRIAN UNIVERSITY OF ATHENS
LABORATORY OF REMOTE SENSING

CURRICULUM VITAE

VASSILIS A. SAKKAS

                                                                                                                                                                                  
                                 

CONTACT DETAILS

Current work address: Department of Geophysics-Geothermy, National & Kapodistrian University of Athens, Panepistimiopolis – Ilissia, 15784 AthensGreece.

Telephone Direct line: +30 2107274914   Mobile phone: +30 6974032994.

E-mail: vsakkas@geol.uoa.gr

 

SUMMARY

  • Exploration geophysicist and remote sensing expert with twelve years experience in field operations and R&D with emphasis on processing and interpretation of multiple geophysical (electromagnetic, magnetic, gravity, seismic, geodetic (GPS), Interferometric (InSAR)) data for subsurface investigations.
  • Designed and successfully completed several field acquisitions of different types of geophysical data in various regions in Greece, Europe and Kenya (East Africa).
  • Extensive experience in joint interpretation of geodetic (GPS) and interferometric data (Differential InSAR, Permanent Scatterrer Interferometry (PSI) and  SqueeSAR Interferometry) for ground deformation monitoring due to tectonic, seismic, volcanic or manmade (water/oil extraction) reasons. Remarkable experience in processing and  interpretation of Satellite Thermal Images (ASTER – LANDSAT), Satellite Optical Images (IKONOS – QiuckBird)
  • Experienced in interpretation of EM (magnetotelluric & transient EM) survey data from volcanic fields in Hellenic territory (Methana,Santorini, Nisyros Volcanoes, Lesvos Island) for geothermal exploration on behalf of Greek Power Company (DEH).
  • Excellent communication skills. Published over 15 R&D papers in leading international journals, and over 15 articles in conference proceedings; Member of national and international research groups that evaluate several funded research proposals for geophysical research in Greece.
  • Experienced in project management (gained from national and European R&D projects).  

 

PROFESSIONAL EXPERIENCE

 

January 2000- present

Research Associate in Department of Geophysics & Geothermics, Faculty of Geology & Geoenvironment, National and Kapodistrian University of Athens

Functions:

·        Procesing, Interpreting and modeling of geophysical data (EM, gravity) aiming to produce 2- and 3-D model images of the subsurface.

·        Modelling of geodetic and interferometric data- forward and inversion, to study ground deformation.

·        Joint processing of seismic (micro-earthquake) data with geophysical and geodetic data for monitoring and modeling of seismic and volcanic areas and evaluate the potential of geothermal fields.

 

 

September 2002- June 2011

Scientific Collaborator as a P.D. 407/80 Lecturer in the Faculty of Geology and Geoenvironment of the University of Athens for courses in Applied Geophysics and Space Geodesy.

 

September 1995 to June 1998

Demonstrator to undergraduate and Post-Graduate (MSc) courses and Laboratory experiments in Geophysics (geosciences, applied geophysics and experimental geophysics) University of Leicester (UK).

Techniques demonstrated: Electromagnetic methods (EM31, Apex Max-Min), VLF (EM16), Transient Electromagnetic (Sirotem MKII, MK3), Induced Polarization (Scintrex, Huntec), direct current (ABEM SAS 300) Magnetics (Scintrex MF-2 Fluxgate Magnetometer, EDA Omni)

 

 

 

OPERATIONS, CONSULTANCIES AND R&D EXPERIENCE:

Participation in project development, management and implementation

  • 2010-2013. TERRAFIRMA - 3 : Pan-European Ground Motion Hazard Information Service.  Global Monitoring for Environment & Security (GMES), European Space Agency (ESA) & EU (2010-2013).

  • 2011. Geothermal exploration of Methana Volcanic Field, 3-D modeling of old MT data, Greek Power Company (DEH).

  • 2010. Ground Deformation Studies in the Central Ionian Islands (Greece) using Time Series Interferometry. European Space Aagency (ESA),  Type: Category 1 Project - C1P.6831 (2010)

  • 2010. Re-processing and 3-D modeling of the high enthalpy Geothermal filed of Nisyros Volcano, Greek Power Company (DEH).

  • 2010. Geophysical and Mineralogical Investigations on the twin-meteorite impact craters in Thessaly (Central Greece) of Holocene age. Latsis Foundation (2010)

  • 2008-2009. Development of a state-of-the-art surveillance system for real-time monitoring of oil pollution. Bilateral Co-operation Greece-Germany, General Secretariat of Research and Technology (GSRT), Athens. (2008-2009)

  • 2005-2008. Investigations of seismic and volcanic activity in the Lithosphere-Troposphere-Ionosphere System based on Satellite and Ground Surface Measurements. Bilateral Co-operation Greece-Russia,  General Secretariat of Research and Technology (GSRT), Athens.

  • 2005-2008. Radon Risk Assessment for Urban Planning αt Atalanti Fault Zone: Evaluation οf Monitoring Strategies Bilateral Co-operation Greece-Ukraine: General Secretariat of Research and Technology (GSRT), Athens.

  • 2004-2008. TERRAFIRMA: Pan-European Ground Motions Risk Assessment Service in Support of Policies Aimed at Protecting the Citizens against Natural & Anthropogenic Ground Motion Hazards. Global Monitoring for Environment & Security. European Space Agency (ESA) & EU

  • 2003-2005. PERIANDROS: Earthquake Protection – Seismic Risk Management in Urban & Sub-Urban areas of Corinth Prefecture. [Financed by 3rd European Framework – Rural Active Programs of Peloponnese].

  • 2003-2005. Crustal Deformation and Volcanic Hazard Assessment along the Hellenic Volcanic Arc (HVA). Announcement for Opportunities for Greece ESA (European Space Agency) project. (Id: AO GR 1497)

  • 2003-2005. SEISMOPOLIS: Development of an Integrated System for the Earthquake Familiarization and Education of the Public. General Secretariat of Research and Technology (GSRT), Athens. .

  • 2003-2004 Crustal Deformation and Volcanic Hazard Assessment along the Hellenic Volcanic Arc (HVA). Announcement for Opportunities for Greece ESA (European Space Agency) project.

  • 2003-2004. Application of Differential Interferometry Mapping Neotectonic Movements due to Human Induced Land Subsidence. AO ESA project.

  • 2003-2004. Terrafirma. ESA’s GMES (Global Monitoring for Environment and Security) Service Element Programme Stage 1: European Space Agency (ESA).

  • 2003-2004. Development of an innovative monitoring tool for the quantitative and qualitative assessment of the pollutants at the agricultural land of the Shkumbini river side (lushnja district), in Albania. Greece-Albania Research project General Secretariat of Research and Technology (GSRT), Athens

  • 2003-2004. Earthquake Protection – Seismic Risk Management in Urban & Sub-Urban areas of Corinth Prefecture. [Financed by 3rd European Framework – Rural Active Programs of Peloponnese]

  • 2002-2004. Joint Application of Space and Ground Techniques detecting Seismic precursors in Kefaillinia Island (Greece). Italy-Greece Research project General Secretariat of Research and Technology (GSRT), Athens.

  • 2001-2003. Geo-spatial Warning Systems (GEOWARN): Nisyros Volcano (Greece) – An Emergency Case Study. [Financed by European Union, Project IST (1999 – 12310)].

  • 2001-2002. Multi-disciplinary studies in the Broader Area of Atalanti Fault (Greece). General Secretariat of Research and Technology (GSRT), Athens.

  • 2001-2002. Precursory seismic studies in the Broader Area of Cephalonia (Greece)”. General Secretariat of Research and Technology (GSRT), Athens

  • 7/1995. Mining exploration contract for R.T.Z. Sa Company in Slovakia Republic. (EM, TEM, IP, dc resistivity, VLF, gravity, magnetics).

  • 1995-1998       Kenya Rift International Seismic Project 95 (KRISP) (Joint EU and USA project). Organized planned and carried out Transient Electromagnetic TEM (SIROTEM MKII) and AMT (S.P.A.M.MK IIb) field work in southern Kenya Rift Valley.  Responsible for the quality of the data and technical problems that appeared.

  • 6-8/1994. Participation in GPS (Ashtech, Wild, Trimble receivers) project in Kithira, Thira, Krete, Patraikos Gulf, Greece.

  • 5/1994. Participation in Archaeological research in Nisiros-Giali, Greece (Magnetics, Micro-Gravity).

  • 1992/1993. Micro-Gravity ( Lacoste-Romberg Gravity meter) measurements in mountain Parnitha, Greece.

  • 10/1991           Participation in MT survey in Methana, Greece, organised by University of Athens in co-operation with University of Edinburgh.

 

 

MILITARY SERVICE

 

May 1999 to January 2000: Hellenic Air Force, with specialization as the Analyst-Programmer in the Head Quarters of the Tactical Air Force – Larissa, and in the Head Quarters office of Air supplier - Eleysina

 

 

EDUCATION

 

Ph.D. Geophysics-EM (1999 June)    University of Leicester, UK

 

B.Sc Physics  (1994)                          National and Kapodistrian University of Athens, Greece

 

 

PROFESSIONAL COURSES AND CERTIFICATIONS

 

  • Geophysics & Archaeology                                                         2012
  • Classical and modern architecture                                                2012
  • Philosophy and communication skills                                            2011
  • MATLAB for signal analysis processing                                       2009
  • PHP / PERL, two web programming languages                            2008
 

PUBLICATIONS


  • Lagios E., Sakkas V., Vlachou K., Novali F., Bellotti F.,Giannico C (2013), SqueeSARTM Analysis and GPS Measurements in Santorini Volcano (1992-2012), Tectonophysics (594, 38-59, doi:10.1016/j.tecto.2013.03.012).

  • Vassilopoulou, S., Sakkas, V., Wegmuller U., Capes, R., (2013). Long term and seasonal ground deformation monitoring of Larissa Plain (Central Greece) by Persistent Scatterer Interferometry.Central European Journal of Geosciences,5/1, 61-76, doi:10.2478/s13533-012-0115-x

  • Sakkas, V., Adam, N., Voulgaris, N., Vassilopoulou, S., Lagios, E., Stramondo, S., (2013) Ground Deformation Study of Broader Area of Patras Gulf (W. Greece) using PSI-WAP, DGPS and Seismicity Analyses,  ESA Living Planet Symposium, Edinburgh, UK.

  • Sakkas, V., Novali, F., Voulgaris, N., Vassilopoulou, S., Fumagalli, A., Allievi, J., Lagios, E. (2013) Combined PSI and Differential GPS Study of Zakynthos Island (W. Greece) for the period 1992-2012,  ESA Living Planet Symposium, Edinburgh, UK.

  • Lagios E., Novali F., Sakkas V., Vlachou K., Bellotti F., Giannico C. & Ferretti A (2012). SqueeSARTM & GPS Ground Deformation Monitoring (1992-2012) of Santorini Volcano (Greece). AGU Fall meeting 2012, San Francisco (USA).

  • Sakkas, V., Lagios, E., Vlachou, K., Novali, F., Bellotti, F., Giannico, C., Sigmundsson, F. (2012). Monitoring the "Unrest" Period (2010-2012) of Santorini volcano (Greece) by SqueeSAR & GPS measurements. VOLSAM 2012 - Volcanism of the Southern Aegean in the frame of the broader Mediterranean area, 10-12 October 2012, Santorini Island, Greece.

  • Sakkas, V. & Lagios E., (2012). Nisyros Volcano: Updating the ground deformation. VOLSAM 2012 - Volcanism of the Southern Aegean in the frame of the broader Mediterranean area, 10-12 October 2012, Santorini Island, Greece.

  • Novali F., Bellotti F.,Giannico C.,  Lagios E., Sakkas V., Vlachou K., (2012) Ground Deformation of Santorini Volcano (1992-2012) based on SqueeSARTM Analysis and GPS Measurements, ESA meeting Santorini 21-23 May.

  • Lagios E., Papadimitriou P., Novali F., Sakkas V., Fumagalli A., Vlachou K. & Del Conte S. (2011), Combined Seismicity Pattern Analysis, DGPS and PSInSAR Studies in the Broader Area of Cephalonia (Greece), Tectonophysics, v524-525, 43-58

  • Lagios, E., Sakkas, V., Novali, F., Fumagalli, A., Del Conte., S., (2011), Ground Deformation Studies In Cephallonia Island (Western Greece) Based on  DGPS  &  PS  Interferometry, Geosciences and Remote Sensing Symposium (IGARSS), 2011 IEEE International, Vancouver Canada, 10.1109/IGARSS.2011.605008

  • Vlachou, K., Sakkas V., Papadimitriou, P., Lagios., E.,  (2011). Crustal Deformation Studies in the Seismically Active Area of Patras Gulf (Greece), Geoscience and Remote Sensing Symposium (IGARSS), 2011 IEEE International, Vancouver Canada, 10.1109/IGARSS.2011.6050082.

  • Chousianitis, K., Sakkas, V.A., Vassilopoulou, S., Lagios, E., (2009) Surface Deformation of Zakynthos Island Deduced From Dgps Measurements And Differential Sar Interferometry (Dinsar), EGE 2009 (submitted).

  • D. Raucoules, I. Parcharidis, D. Feurer, F. Novalli, A. Ferretti, C. Carnec, E. Lagios, V. Sakkas, S. Le Mouelic, G. Cooksley and S. Hosford (2008). Ground deformation detection of the broader area of Thessaloniki (Northern Greece) using radar interferometry techniques. Nat. Hazards Earth Syst. Sci., 8, 779–788.

  • Poscolieri , M., Gregori, G.P., Lagios E.,  Marson, I., Lupieri , M., Paparo, G., Parcharidis, I., Sakkas, V., Ventrice, G. (2008). Crustal stress monitoring in the Cephallonia Island (Western Greece) on the basis of a multi-parametric Approach. Geophysical Research Abstracts, Vol. 10, EGU2008-A-00000, 2008 EGU General Assembly.

  • Meju, M.A. and Sakkas, V. (2007).. Heterogeneous crust and upper mantle across southern Kenya and the relationship to surface deformation as inferred from magnetotelluric imaging. Journal Geophysical Research, 112, B04103.

  • Lagios, E., Sakkas, V., Papadimitriou, P., Parcharidis, I., Damiata, B.N., Chousianitis, K., Vassilopoulou, S., (2007). Crustal deformation in the Central Ionian Islands (Greece):Results from DGPS and DInSAR analyses (1995–2006), Tectonophysics 444,  119–145.

  • Lagios, E., Vassilopoulou, S., Sakkas, V., Dietrich, V., Damiata, B.N., Ganas, A. (2007). Testing satellite and ground thermal imaging of low-temperature fumarolic fields: The dormant Nisyros Volcano (Greece).  ISPRS Journal of Photogrammetry & Remote Sensing. doi:10.1016/j.isprsjprs.2007.07.003

  • Lagios E., Sakkas V., Parcharidis I., Vassilopoulou S., Wegmüller U. & Capes R. (2007). Long Term And Seasonal Ground Deformation Monitoring Of Larissa Plain (Central Greece) by Persistent Scatterer Interferometry (Psi) The 2007 International Geohazards Week. Abstract Book pp157, 21-22.

  • Vassilopoulou, S., Chousianitis, K., Sakkas, V., Damiata, B.N., Lagios, E., (2007). GIS development for graound deformation data management. A Case study in Cephallonia Island (Western Greece). Bull. Of The Geological Sociaty of Greece vol. XXXVII, Proceedings of the 11th Int. Congress.

  • Gregori, G., Lagios, E., Lupieri, M., Paparo, G., Parcharidis, I., Sakkas, V. (2007). Multi-parametric monitoring of crustal stress propagation in a very active tectonic area such as the Cephallonia island (Greece). IUGG 2007 Perugia – Abstract.

  • Parcharidis, I., Lagios, E., Sakkas, V., Raucoules, D., Feurer, D., & Le Mouelic, S. et al. (2006). Subsidence monitoring within the Athens basin (Greece) using space radar interferometric techniques. Earth, Planets and Space, 58(5), 505-513.

  • Poscolieri1, M., Lagios, E., Gregori1, P.G., Paparo, G., Sakkas, V., Parcharidis, I., Marson, I., Soukis, K., Vassilakis, E., Angelucci, F., Vassilopoulou, S., (2006). Crustal stress and seismic activity in the Ionian archipelago as inferred by satellite- and ground-based observations, Kefallinia, Greece. From: CELLO, G. & MALAMUD, B. D. (eds) 2006. Fractal Analysis for Natural Hazards. Geological Society, London, Special Publications, 261, 63–78.

  • Galanopoulos, D., Sakkas, V., Kosmatos, D., & Lagios, E. (2005). Geoelectric investigation of the Hellenic subduction zone using long period magnetotelluric data. Tectonophysics, 409(1-4), 73-84.

  • Lagios, E., Sakkas, V., Parcharidis, I., & Dietrich, V. (2005). Ground deformation of Nisyros volcano (Greece) for the period 1995-2002: Results from DInSAR and DGPS observations. Bulletin of Volcanology, 68(2), 201-214.

  • Parcharidis, I., Foumelis, M., Sakkas, V., & Lagios, E. (2005). Deformation monitoring in Kos island (Hellenic volcanic arc, eastern Greece) using differential interferometry. International Geoscience and Remote Sensing Symposium (IGARSS) 4, art. no. 1525674, pp. 2899-2902

  • Lagios., E., Parcharidis, I., Foumelis, M., Sakkas, V. (2005). Ground Deformation Monitoring of the Santorini Volcano using Satellite Radar Interferometry. IEEE, 667-672.

  • Lagios E., Sakkas V, Parcharidis Is., Vassilopoulou S., Poscolieri M., Gregori G.P, Paparo G., Marson I., (2004). Ground Deformation Deduced by DGPS, DInSAR, AE, and DEM analysis in Cephallonia Island. Proceedings of the 8th World Multi-Conference on Systemics, Cybernetics and Informatics, Orlando USA.

  • Parcharidis I., Lagios E., and Sakkas V (2004). Differential interferometry as a tool of an early warning system in reducing the volcano risk: the case of Nisyros volcano. Proceedings of 10th International Congerss of EGE, vol. of extended abstracts, p. 546-547.

  • Raucoules D., Lagios E., Parcharidis Is., Sakkas V., Feurer D., Le Mouelic S., King C., Carnec C., Novali F., Ferretti A., Capes R., Cooksley G. (2004).. Subsidence in the Athens Basin monitored by INSAR. Geophysical research Abstracts. Vol.6, 07046.

  • Vassilopoulou, S., Ganas, A., Sakkas V. & Lagios, E., (2004). Surface Temperature Monitoring of Nisyros Volcano (Greece) using Space and Ground Techniques. Proceedings of 10th International Congerss of EGE, vol. of extended abstracts, p.. 648-649

  • <>Sakkas V, Lagios E, Parcharidis Is, Soukis K & Vassilakis E. (2004). Ground Deformation deduced by DGPS and DInSAR in Cephallonia Island. Proceedings of 10th International Congerss of EGE, vol. of extended abstracts, p. 582-583

  • <>Sakkas, V., Pirli, M., Vassilopoulou, S., Kaviris, G., Kranis, CH., Voulgaris, N., Papadimitriou, P., Lagios, E. & Makropoulos, K. (2004). Crustal Deformation in the Broader Atalanti Area (Greece). XXIX General Assemply of the European Seismological Commission. Potsdam, Germany, Sept. 12-17, 2004 (abstract)

  • Ganas, A., Vassilopoulou, S., Sakkas, V., Lagios, E., Dietrich, V., Hurni, L. & Stavrakakis, G. (2003). Thermal Monitoring of Nisyros Volcano (Greece) by Digital Processing of Satellite Images. EGS – AGU – EUG Joint Assembly, Nice, France (Poster)

  • Lagios E., Ganas A., Parcharidis I., Sakkas V., & Vassilopoulou S., (2003). Volcano Hazard Monitoring using Space Techniques: The case study of Nisyros Island. 3rd GMES Meeting, Athens 2003 (Poster).

  • Sakkas V., Meju M.A. Khan M.A., Haak V., Simpson F., (2002). Magnetotelluric Images of the crustal structure of Chyulu Hills volcanic field, Kenya, Tectonophysics 346, 169-185

  • Sakkas V., Parcharidis Is., Vassilopoulou SP., Lagios E., (2002). Surface Displacement Model of Nisyros Volcanic Field deduced from DInSAR & DGPS Measurements, Eleventh General Assembly of the Wegener Project

  • Lagios E., Dietrich, V., Stavrakakis G., Parcharidis I., Sakkas V., Vassilopoulou, S., (2001). Does Nisyros Volcano (GR) Become Active? Seismic Unrest and Crustal Deformation. European Geologist, 12, 44-50.

  • Simpson, F.L., Haak, V., Khan, M.A., Sakkas, V., and Meju, M.A., (1997). The KRISP-94 magnetotelluric survey of early 1995: first results: Tectonophysics, 278, 261-271

  •  Sakkas V.A., Meju M.A. Khan M.A. (1997). Transient Electromagnetic and Magnetotelluric Survey Across Southern Kenya Rift Valley: preliminary results, 5th International Congress of the Brazilian Geophysical Society.

  • Sakkas V.A., Meju M.A. Khan M.A., (1997). MT and TEM experiment in Southern Kenya, UKGA21 Conference (προφορική παρουσίαση).

  • Sakkas V., Meju M.A. Khan M.A., (1996). Correction of Static Shift in MT survey across Kenya Rift Valley using TEM data. German Electromagnetic colloquium (παρουσίαση poster).

  • Sakkas V., Meju M.A. Khan M.A., Simpson F., (1996). Transient Electromagnetic and Magnetotelluric Study of the Structure Across Southern Kenya Rift Valley. The 13th Workshop on Electromagnetic Induction in the Earth (παρουσίαση poster).

 

COMPUTING EXPERIENCE

·      Extensive Programming skills: Good knowledge of  FORTRAN, PASCAL, HTML, JAVA, PHP, Perl, MATLAB. Routinely used and altered FORTRAN codes for processing of geophysical data.

·      Have extensively used many word-processing, spreadsheet and drawing packages for writing and presenting reports, and commercial packages for geophysical data processing:

  •   Leica Geo-office and BERNESE v4.2 & 5.0 for GPS data processing
  • Geotools for MT processing
  • Temix-GL for TEM
  • Generic Mapping Tool  (GMT) for Geophysical presentation
  • Roi-Pac, EARTH - View/EVInSAR, APP for Interferometric SAR processing
  • ERDAS and GEOMATICA V8.1.2 , for Image processing

 

  • ·             Experienced in Geographic Information System (GIS) Arc-Inf
  • ·      Experienced in use of MS-DOS, WINDOWS, MAC LINUX and UNIX (SUN) operating systems.

 




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