I am mainly interested in:

1. The geodetic strain associated to actively deforming orogens. GPS geodesy is the most convenient technique to quantify the strain associated to intracontinental deformation. I was involved in the setup and the measurement of several GPS networks in the Caucasus, the Alps and Pyrenees and in Iran.
2. The geodetic signal associated to earthquakes and landslides. INSAR and GPS techniques allows a precise determination of the deformation associated to these phenomema.
3. The detection of water vapour in the troposphere using GPS geodesy. Because pressure, temperature and water vapour modifies the air refraction, the inversion of GPS signal allows to measure both hydrostatic and wet tropospheric delays. The wet delay has a special interest because it is a unique source of information about the integrated water content of the atmosphere. Therefore, assimilation of GPS delays in numerical weather prediction model is a promising approach to improve precipitation forecasting.

Related publications :

Boniface, K, Ducrocq, V, Jaubert, G, Yan, X, Brousseau, P, Masson, F, Champollion, C, Chery, J, Doerflinger, E, Impact of high-resolution data assimilation of GPS zenith delay on Mediterranean heavy rainfall forecasting, Ann. Geophysicae, 27, 2739-2753, 2009. PDF

Peyret, M, Djamour, Y, Hessami, K, Regard, V, Bellier, O, Vernant, P, Daignieres, M, Nankali, H, Van Gorp, S, Goudarzi, M, Chery, J, Bayer, R, Rigoulay, M, Present-day strain distribution across the Minab-Zendan-Palami fault system from dense GPS transects, Geoph. J. Int., 179, 751-762, 2009.

Peyret, M., Y. Djamour, M. Rizza, J.-F. Ritz, J.-E. Hurtrez, M.A. Goudarzi, H. Nankali, J. Chery, K. Le Dortz, F. Uri, Monitoring of the large slow Kahrod landslide in Alborz mountain range (Iran) by GPS and SAR interferometry, Engineering Geology, 100, 131-141, 2008. PDF

Peyret M, Chery J, Djamour Y, et al. , The source motion of 2003 Bam (Iran) earthquake constrained by satellite and ground-based geodetic data, Geoph. J. Int. 169, 849-865, 2007. PDF

Walpersdorf, A., D. Hatzfeld, H. Nankali, F. Tavakoli, F. Nilforoushan, M. Tatar, P. Vernant, J. Chéry, and F. Masson, Difference in the GPS deformation pattern of north and central zagros (Iran): Geoph. J. Int., v. 167, p. 1077-1088, 2006. PDF

Masson, F., Y. Djamour, S. Van Gorp, J. Chéry, M. Tatar, F. Tavakoli, H. Nankali, and P. Vernant, Extension in NW Iran driven by the motion of the South Caspian Basin: Earth and Planet. Sci. Lett., v. 252, p. 180, 2006. PDF

Bayer R., J. Chéry, M. Tatar, Ph. Vernant, M. Abassi, F. Masson, F. Nilforoushan, E. Doerflinger, V. Regard and O. Bellier, Active deformation in Zagros Makran transition inferred from GPS measurements, Geoph. J. Int., 165, 373-381, 2006. PDF

Masson, F., J. Chéry, D. Hatzfeld, J. Martinod, P. Vernant, F. Tavakoli, M. Ghafory-Asthiani, Seismic versus aseismic deformation in Iran inferred from earthquakes and geodetic data, Geophys. J. Int., 160, 217-226, 2005. PDF

Champollion C., F. Masson, J. Van Baelen, A. Walpersdorf J. Chéry and E. Doerflinger, GPS monitoring of the tropospheric water vapor distribution and variation during the 9 September 2002 torrential precipitation episode in the Cévennes (southern France), J. Geophys. Res., 109, D24102, doi: 10.1029/2004JD004897, 2004. PDF

Vernant, P., F. Nilforoushan, J. Chéry, R. Bayer, Y. Djamour , F. Masson, H. Nankali, J.-F. Ritz, M. Sedighi, F. Tavakoli, Deciphering oblique shortening of central Alborz in Iran using geodetic data, Earth Planet. Sci. Lett., 223, 177-185, 2004. PDF

Vernant, P., F. Nilforoushan, D. Hatzfeld, M. Abbassi, C. Vigny, F. Masson, H. Nankali, J. Martinod, A. Ashtiani, R. Bayer, F. Tavakoli, and J. Chéry, Contemporary Crustal Deformation and Plate Kinematics in Middle East Constrained by GPS measurements in Iran and Northern Oman, Geophys. J. Int., 157,381-398, 2004. PDF

Nilforoushan, F., F. Masson, P. Vernant, C. Vigny, J. Martinod, M. Abbassi, H. Nankali, D. Hatzfeld, R. Bayer, F. Tavakoli, A. Ashtiani, E. Doerflinger, M. Daignières, P. Collard, and J. Chéry, GPS network monitors the Arabia-Eurasia collision deformation in Iran, J. Geodesy, 77, 4, 11-422, 2003. PDF

Tatar M., D. Hatzfeld, J. Martinod, A. Walpersdorf, M. Ghafori-Ashtiany, J. Chéry, The present-day deformation of the central Zagros from GPS measurements, Geophys. Res. Lett., 29, doi 10.1029/2002GL015427, 2002. PDF

Vigny J., J. Chéry, T. Duquesnoy, F. Jouanne, J. Ammann, M. Anzidei, J.P. Avou-ac, F. Barlier, R. Bayer, P. Briole, E. Calais, F. Cotton, F. Duquenne, K. Feigl, M. Flouzat, J.F. Gamond, A. Geiger, A. Harmel, M. Kasser, M. Laplanche, M. Le Pape, J. Martinod, G. Ménard, B. Meyer, J.C. Ruegg, J.M. Scheubel, O. Scotti and G. Vidal, GPS network monitors the Western Alps over a five year period: 1993-1998, J. of Geodesy, 76, 63-76, 2002.

Calais E., R. Bayer, J. Chéry, F. Cotton, E. Doerflinger, M. Flouzat, F. Jouanne, M. Kasser, M. Laplanche, D. Maillard, J. Martinod, F. Mathieu, P. Nicolon, J-M. Nocquet, O. Scotti, L. Serrurier, M. Tardy, C. Vigny, Regal: réseau permanent dans les Alpes Occidentales. Configuration et premiers résultats, Bull. Soc. géol. France, 172, 141-158, 2001.

Calais E., R. Bayer, J. Chéry, F. Cotton, E. Doerflinger, M. Flouzat, F. Jouanne, M. Kasser, M. Laplanche, D. Maillard, J. Martinod, F. mathieu, P. Nicolon, J-M. Nocquet, O. Scotti, L. Serrurier, M. Tardy, C. Vigny, Regal: réseau permanent dans les Alpes Occidentales. Configuration et premiers résultats, C.R. Acad. Sci. Paris, 331, 435-442, 2000.

Doerflinger E., R. Bayer, J. Chéry, and B. Buerki, The Global Positioning System in mountainous area : effect of the troposphere on the vertical GPS accuracy, C. R. Acad. Sci., 326, 319-325, 1998.

Chéry J., Vigny C., Meyer B., Ferhat G., M. Anzidei, R. Bayer, L. Boloh, P. Briole, A. Deschamps, K.L. Feigl, J.F. Gamond, A. Geiger, F. Jouanne, M. Kasser, M. Lepape, J. Martinod, G. Ménard, J.C. Ruegg, J.M. Scheubel, and J.J. Walch, Global positioning system network monitors the Western Alps, EOS, 76, Nov. 28, 1995.

Anzidei, M., P. Briole, and J. Chéry, The GPS Alps project, Bolletino di Geodesia e Scienze Affini, 4, 383-396, 1994.