| > عضو هيأت علمي > عبدالرضا صفري |  | | سطح علمي: | دانشيار | | دکترا: | Geodesy, University of Tehran, Tehran/Iran | | کارشناسي ارشد: | Geodesy, University of Tehran, Tehran/Iran | | کارشناسي: | Surveying Engineering, University of Tehran, Tehran/Iran | | |
| > Research Interests | | Gravity Field Modeling | | Mathematical Geodesy | | Geodynamics | | Inverse problems in geodesy and geodynamic | | Ellipsoidal splines and wavelets | | Scattered Data Approximation |
| | > Scientific and Execative Positions | | 2005-2006 Educational deputy of the Department of Surveying and Geomatics engineering, Faculty of Engineering, University of Tehran/Iran. | | 2007 Visiting researcher - Geomathematics group,Department of mathematics of Kaiserslautern university,Germany. |
| | > Graduate Course Teachings | | Approximation Theory and Time Series Analysis | | Advanced Geodynamics | | Geoid and Quasi-Geoid Computations in the Era of GPS |
| | > Under Graduate Course Teachings | | Geodetic Surveying | | Geometrical Geodesy | | Theory of Error | | Adjustment and Statistical Tests | | Physical Geodesy |
| | > Peer-reviewed Journal Papers | | Ardalan A. A., Safari A. (2004) Ellipsoidal terrain correction based on multi-cylindrical equal-area map projection of the reference ellipsoid. Journal of Geodesy, 78: 114-123. | | Safari A., Ardalan AA., Grafarend EW.(2005) A new ellipsoidal gravimetric, satellite altimetry, astronomic boundary value problem; case study: geoid of Iran. Journal of Geodynamics, 39: 545-568. | | Safari A., Ardalan A.A. (2005) Local Geoid Computations Based on Boundary Data of The Type Gravity Intensity and Satellite Altimetry, Case Study: High-Resolution Geoid of Iran . Journal of Faculty of Engineering of University of Tehran (in Persian). 38: 841-852. | | Ardalan A.A., Safari A. (2005) Global height datum unification: A new approach in the gravity potential space. Journal of Geodesy, 79: 512-523 | | Ardalan, A., Safari, A.(2005) A method for computing offset of zero points of height data with respect to geoid. Journal of Earth and Space Physics, Vol. 31, No. 2 | | Ardalan A. A., Safari A., Jamour Y. (2006) A comparative study of the recent geopotential models for synthesizing different gravity functionals at the geographical region of Iran. Journal of the Earth and Space Physics, 32: 107-116.
| | Safari, A., Ardalan, A.A. (2007)New Cylindrical Equal Area and Conformal Map Projections of the Reference Ellipsoid for Local Applications. Survey Reveiw, Vol. 39, No. 304.
| | Ardalan A. A., Safari A., Jomegi A. (2007) On the effect of Digital Terrain Model on the geoid computation methodology without applying Stock’s formula. Journal of the Earth and Space Physics, 33: 85-105. | | Ardalan A.A., Safari A., and Salmi H. (2007) On the indirect tidal effect on the gravity field and geometry of the crust at the coastal areas. Journal of the Earth & Space Physics. 33: 1-20. | | Ardalan A. A., Safari A., Jomegi A. (2007) Geoid determination based on boundary values of the type modulus of gravity vector, satellite altimetry and GPS/Leveling data. Nasir Journal of Science and Engineering, 2: 23-43.
| | Safari A., Allahtavakoli Y. (2008) A Comparison of direct and indirect regularization methods for downward continuation problem of geoid computations. Journal of Earth and Space physics, Vol. 34., No. 1, 89-108. | | Safari A., Allahtavakoli Y. (2008) On the solvability of downward continuation problem in geoid computations without applying Stokes formula. Journal of Faculty of Engineering of University of Tehran, Vol. 42, No. 3. | | Ardalan A.A., Safari A., Allahtavakoli Y. (2008) On the optimum method for estimation of regularization parameter of downward continuation in the problem of geoid computation without Stokes formula.Journal of Earth and Space physics, Vol. 34., No. 3, 57-78. | | Ardalan A.A., Safari A.(2008) A methodology for combination of GPS/Leveling geoid as boundary data with the gravity boundary data within a gravimetric boundary value problem. Journal of Earth and Space physics, Vol. 34., No. 3, 79-92. | | Safari A., Hatam Y., Shahhaidari M. (2009) Fixed garvimetric-altimetry boundary value problem for geoid determination at islands, Case study: Qeshm island. Journal of Earth and Space physics, Vol. 34., No. 4. | | Ardalan A.A., Safari A., Allahtavakoli Y. (2009)On the Regularization of the Inverse Solution of Abel-Poisson Integral Based on Truncated Singular Value Decomposition and Generalized Tikhonov Regularization Methods. Journal of Faculty of Engineering of University of Tehran, Vol. 43., No. 5, 487-500. | | Ardalan A.A., Safari A., Jomegi A. (2009)Comparison of Four Recent Geopotential Models based on Synthesis of Modulus of Gravity Acceleration Vectorat a Test Area in Southern Coast of Iran. Journal of Faculty of Engineering of University of Tehran, Vol. 43., No. 5, 479-485. | | Safari A., Jamour Y., Ghanizadeh M. (2009)Modifying the AFM Method for the Solution of Phase Ambiguity at Sea Areas. Journal of Faculty of Engineering of University of Tehran, Vol. 43., No. 5, 561-569. | | Safari A. (2010) A new method for height systems computations based on the solution of
geodetic fixed boundary value problem. Journal of Earth and Space physics, 36, No.1.
| | Safari A., Amjadiparvar B. (2010) Accuracy estimation of GRACE satellite geopotential model. Geospatial Engineering Journal No.1.
| | Safari A., Sharifi MA, Amjadiparvar B. (2011) Using the Multiplicative Schwarz Alternating Algorithm(MSAA) for Solving the Large Linear System of Equations Related to Global Gravity Field Recovery up to Degree and Order 120. Journal of Earth and Space physics, No.1. | | khazai S., Homayouni S., Safari A. (2011) Hyperspectral Imagery and CC&D Considerations against its threats. The Scientific Journal of Advanced Defence Science & Technolog, No.2. | | khazai S., Homayouni S., Safari A., Mojaradi, B. (2011) Anomaly Detection in Hyperspectral Images Based on an Adaptive Support Vector Method. IEEE, Geoscience and Remote Sensing Letters,IEEE, No.4, Page(s): 646 – 650.
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| | > Contributions at the International Conferences | | Ardalan, A.A., Safari, A., Grafarend E.W. (2003) A new ellipsoidal gravimetric- satellite altimetry boundary value problem; case study : High resolution Geoid of Iran. Geophysical Research Abstracts, volume 5 , 2003 28th General Assembly of the European Geophysical Society, Nice France, 6-11 April 2003. | | Ardalan, A.A., Safari, A., Grafarend E.W. (2003) Terrain correction on the moving equal area cylindrical map projection of the surface of a reference ellipsoid. Geophysical Research Abstracts, volume 5 , 2003 28th General Assembly of the European Geophysical Society, Nice France, 6-11 April 2003. | | Safari A., Ardalan A.A. (2003) Computations of sea surface topography in the potential space versus the geometry space ; case studies . Sapporo, Japan. 30 June-11 July. | | Safari A., Ardalan A.A. (2003) Validity control of the sea gravity data; case studies . Sapporo, Japan. 30 June-11 July. | | Ardalan AA., Safari A., Grafarend EW.( (2003) High resolution gravimetric-satellite altimetry geoid computation based on ellipsoidal fixed-free two-boundary value problem. Sapporo, Japan. 30 June-11 July. | | Ardalan A.A, Safari A. (2003) Computations of sea surface topography in the potential space versus the geometry space ; case studies. Geophysical Research Abstracts, volume 5 , 2003 28th General Assembly of the European Geophysical Society, Nice France, 6-11 April 2003. | | Safari A., Ardalan AA., Grafarend (2003) ) High resolution geoid computations without applying of stokes’s formula: High resolution geoid of Iran. Sapporo, Japan. 30 June-11 July. | | Ardalan A.A, Safari A. (2003) Terrain correction on the moving equal area cylindrical map projection of the surface of a reference ellipsoid. Sapporo, Japan. 30 June-11 July. | | Safari A., Ardalan AA. (2004) ) High resolution geoid computations without applying of stokes’s formula, based on gravimetric, satellite altimetry, astronomic boundary observables. Case study: geoid of Iran. Geophysical research abstracts, volume 6, 2004. EGU-1st General Assembly. | | Ardalan A.A., Safari A. (2004) On the computation of terrain correction in geoid computations without applying stokes formula. Geophysical research abstracts , volume 6, 2004. EGU-1st General Assembly. | | Safari A., Ardalan A.A. (2004) On the solution existence of downward continuation problem in ellipsoidal geoid computation without applying stokes formula . Geophysical research abstracts, volume 6, 2004. EGU-1st General Assembly. | | Ardalan A.A, Safari A. (2004) Ellipsoidal Terrain correction based on multi-cylindrical equal area map projection of the surface of the reference ellipsoid. Geophysical research abstracts, volume 6, 2004. EGU-1st General Assembly. | | Ardalan A.A., Safari, A. (2005) Analytical study of the Bjerhammar sphere. Geophysical Research Abstracts, 7: 00776, European Geosciences Union 2005. | | Safari A., Ardalan A.A. (2005) Downward continuation problem in geoid computation without applying Stokes formula. Geophysical Research Abstracts, 7:00813, European Geosciences Union 2005. | | Ardalan A.A., Safari A. (2005) Level sets, implicit function theorem, and their application in gravity field modelling (spherical and ellipsoidal examples). Geophysical Research Abstracts, 7: 00785, European Geosciences Union 2005. | | Safari A., Ardalan A.A. (2005) On the accurate computations of sea surface topography; case study: SST of Persian Gulf and Oman Sea. Geophysical Research Abstracts, 7: 10562, European Geosciences Union 2005. | | Safari A., Ardalan A.A. (2005) Two cylindrical of the types equiareal and conformal map projections of the reference ellipsoid for the local applications. Geophysical Research Abstracts, 7: 10564, European Geosciences Union 2005. | | Ardalan A.A., Safari A. (2005) Global height datum unification based on potential theory. Geophysical Research Abstracts, 7: 00681, European Geosciences Union 2005. | | Ardalan A.A, Safari A. (2005) Gravity field determination from combination of the terrestrial, satellite, and airborne gravimetry as well as satellite altimetry observations and astronomical longitude and latitude. Joint Assembly of IAG, IAPSO, and IABO. 22 - 26 August 2005, Cairns, Australia. | | Ardalan A.A, Safari A. (2005) A new estimate for the radius of the mean Earth sphere. Joint Assembly of IAG, IAPSO, and IABO. 22 - 26 August 2005, Cairns, Australia. | | A. Ardalan, A. Safari, M. Poutanen, M. Bilker-Koivula (2006) Verification of new geopotential models at a test area in Finland.Geophysical Research Abstracts,Vol. 8, 10078, 2006. EGU-3st General Assembly.
| | A. Ardalan, A. Safari, M. Poutanen, M. Bilker-Koivula (2006) Geoid computation without application of Stokes formula based on very localized gravity data of heterogeneous types Case study: Finland test area. Geophysical Research
Abstracts, Vol. 8, 2006. EGU-3st General Assembly.
| | A. Safari, A. Ardalan,Y. Allahtovakoli (2006) On determination of regularization parameter in Geoid computations without applying Stokes formula. Geophysical Research Abstracts, Vol. 8, 2006. EGU-3st General Assembly.
| | A. Ardalan, A. Safari, H. Hashemi-Farahani (2006) An attempt to find the current best estimate of geoid’s potential value from global mean sea level and geopotential models. Geophysical Research Abstracts, Vol. 8, 2006. EGU-3st
General Assembly.
| | A. Safari, A. Ardalan, M. Poutanen, M. Bilker-Koivula (2006) A proposal for combination of GPS/Leveling data in the gravimetric geoid computation Case study: test area Southwest of Finland. | | A. Ardalan and A. Safari (2005) A new ellipsoidal boundary value problem for geoid computation with airborne gravimetry data in combination with all types of gravity observables. Dynamic Planet 2005. Joint Assembly of IAG, IAPSO, and IABO. Cairns, Australia August 22-26. | | M. Jafari, Gh. Joodaki, V. Nafisi, A. Safari (2007) Estimation of Sea Surface
Topography Using Orthogonal Functions Over Persian Gulf and Oman Sea.
Geophysical Research Abstracts, Vol. 9, 2007. EGU
General Assembly.
| | Safari, A., Ardalan, A.A., Allahtavakoli, Y., (2007) On the optimum choices of
estimation of regularization parameter for downward continuation problem of
geoid computation without applying Stokes formula. Geophysical Research Abstracts, Vol. 9, 2007. EGU
General Assembly.
| | Ardalan, A.A., Safari, A., Hashemi, H. (2007) On the optimum way to estimate
geoid’s potential value at the era of altimetry satellites. Geophysical Research Abstracts, Vol. 9, 2007. EGU General Assembly.
| | Ardalan, A.A., Safari, A., Jomegi, A. (2007) Comparison of recent geopotential models
for synthesizing modulus of gravity vector Case study: southern coast of Iran. Geophysical Research Abstracts, Vol. 9, 2007. EGU General Assembly.
| | Ardalan A.A., Safari, A., Jomegi, A. (2007) Modeling of modulus of gravity vector in
the oceans based on satellite altimetry data. Geophysical Research Abstracts, Vol. 9, 2007. EGU General Assembly.
| | Safari, A., Allahtavakoli, Y. (2007) A Comparison of direct and indirect
regularization methods for downward continuation problem of geoid computations without applying Stokes formula. Geophysical Research Abstracts, Vol. 9, 2007. EGU General Assembly.
| | Ardalan, A.A., Safari, A., Jomegi, A. (2007) The effect of digital terrain model resolution
in geoid computations without applying Stokes formula Case Study: southern coast of Iran. Geophysical Research Abstracts, Vol. 9, 2007. EGU General Assembly.
| | Safari, A., Ardalan, A.A., Jomegi, A. (2007) The effect of anomalous density of crust in
geoid computations without applying Stokes formula Case study: Southern coast of Iran. Geophysical Research Abstracts, Vol. 9, 2007. EGU General Assembly.
| | Safari, A., Allahtavakoli, Y. (2007) On the solvability of downward
continuation problem in geoid computations without applying Stokes formula. Geophysical Research Abstracts, Vol. 9, 2007. EGU General Assembly.
| | Ardalan, A.A., Safari, A., Hashemi, H., Jalilnejad, M. (2007) How to build a consistent
reference system for geodesy and geodynamics. Geophysical Research Abstracts, Vol. 9, 2007. EGU General Assembly.
| | Ardalan, A.A., Safari, A., Jomegi, A. (2007) Geoid determination based on boundary
values of the type modulus of gravity vector, satellite altimetry and GPS/leveling data Case study: geoid determination at southern coast of Iran. Geophysical Research Abstracts, Vol. 9, 2007. EGU General Assembly.
| | Safari, A., Ardalan, A.A., Jomegi, A. (2007) Variance components estimation in geoid
computations based on heterogeneous boundary values Case study: southern coast of Iran. Geophysical Research Abstracts, Vol. 9, 2007. EGU General Assembly.
| | Safari, A., Ghanizadeh, M. (2007) Modifying the AFM method for the solution of
phase ambiguity at sea areas. Geophysical Research Abstracts, Vol. 9, 2007. EGU General Assembly.
| | Safari, A., Allahtavakoli, Y. (2007) Statistical Downward Continuation in Gravity
Field Modeling. Geophysical Research Abstracts, Vol. 9, 2007. EGU General Assembly.
| | Jafari, M., Nafisi, V., Jodaki, GH., Safari, A. (2007) Reconstruction and comparison of
EIGEN-1S, EIGEN-2, EIGEN-GRACE01S, EGM96 geopotential models using Spherical Wavelets. Geophysical Research Abstracts, Vol. 9, 2007. EGU General Assembly.
| | Sharifi A., Safari A.,Farzaneh S.(2008) Optimal derivation of velocity field fromdiscretely sampled position vector at GPS permanent stations. Geophysical Research Abstracts, Vol. 10, 2008. EGU General Assembly. | | Safari A., Sharifi M.A.(2008) Realization of different height systems based on the solution of fixed boundary value problem. Geophysical Research Abstracts, Vol. 10, 2008. EGU General Assembly. | | Safari A.(2008) Fixed garvimetric-altimetry boundary value problem for geoid determination at islands. Geophysical Research Abstracts, Vol. 10, 2008. EGU General Assembly. | | Safari A., Sharifi A.(2008) A new validation technique for shipborne gravity observations based onsatellite altimetry data Case study: The Persian Gulf. Geophysical Research Abstracts, Vol. 10, 2008. EGU General Assembly. | | Safari, A. , Sharifi M.A., Amjadiparvar B. (2010) Using the Multiplicative Schwarz Alternating Algorithm (MSAA) for Solving the Large Linear System of Equations Related to Global Gravity Field Recovery up to Degree and Order 120. Geophysical Research Abstracts, Vol. 12, 2010. EGU General Assembly.
| | Safari, A. , Sharifi M.A. (2010) A new method for solving fixed geodetic boundary-value
problem based on harmonic splines. Geophysical Research Abstracts, Vol. 12, 2010. EGU General Assembly.
| | Safari, A. , Allahtavakoli Y. (2010) ART needs to be accelerated. Geophysical Research Abstracts, Vol. 12, 2010. EGU General Assembly.
| | Sharifi M.A., Safari, A. , Yousefzadeh T. (2010) Denoising Gravity data using Spherical smoothing splines. Geophysical Research Abstracts, Vol. 12, 2010. EGU General Assembly.
| | Safari, A. , Sharifi M.A., Yousefzadeh T. (2010) A new Method for Optimal Selection of the Bandwidth parameter in the Gravity Modeling using the Radial Basis Functions. Geophysical Research Abstracts, Vol. 12, 2010. EGU General Assembly.
| | Khazai S., Safari, A. , Homayouni S., Mojaradi B. (2011) A performance comparison between recent anomaly detectors on hyperspectral images. International Conference on Sensors and models in Photogrammetry and Remote Sensing, SMPR2011, Tehran, Iran.
| | Niazmardi S., Homayouni S, Safari, A. (2011) Remotely Sensed Image Clustering Based on Kernel-Based Fuzzy C-Means Algorithm. International Conference on Sensors and models in Photogrammetry and Remote Sensing, SMPR2011, Tehran, Iran.
| | Jamshidzadeh A., Homayouni S, Safari, A. (2011) Impact of endmembers number estimation on
accuracy of hyperspectral unsupervised soft classification. International Conference on Sensors and models in Photogrammetry and Remote Sensing, SMPR2011, Tehran, Iran.
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| | > Finished Research Projects | | Computation of geoid with global details for Iran | | Ellipsoidal terrain correction | | Computation of the high-resolution geoid of Iran based on boundary data of the type gravity intensity and satellite altimetry observations | | Global gravity field modeling
| | Variance component estimation in geoid determination | | Local Geoid Computations Based on Boundary Data of The Type Gravity Intensity and Satellite Altimetry and GPS/Leveling | | On the Parameter estimation methods in Downward continuation problem | | On the comparison between SVD and generalized Tikhonov method in downward continuation problem |
| | > Current Research Projects | |
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