A5101851703- Geophysics and Gravity Measurements
- GNSS positioning and interference
- Ionosphere and magnetosphere dynamics
- Geomagnetism and Paleomagnetism Studies
- Statistical and numerical algorithms
- Inertial Sensor and Navigation
- Earthquake Detection and Analysis
- Geophysical and Geoelectrical Methods
- Solar and Space Plasma Dynamics
- Oceanographic and Atmospheric Processes
- earthquake and tectonic studies
- Marine and environmental studies
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Conservation, Biodiversity, and Resource Management
- Computational Physics and Python Applications
- Oil Palm Production and Sustainability
- Remote Sensing and LiDAR Applications
- Scientific Research and Discoveries
- Reservoir Engineering and Simulation Methods
- Seismic Imaging and Inversion Techniques
- Landslides and related hazards
- Advanced Frequency and Time Standards
- Hydrological Forecasting Using AI
- Atmospheric Ozone and Climate
- Soil Moisture and Remote Sensing
University of Tehran
2015-2024
Sharif University of Technology
2023
Amirkabir University of Technology
2023
University of Twente
2017
Geomatics (Norway)
2013
University of Stuttgart
2004-2006
The Gravity Recovery and Climate Experiment (GRACE) twin‐satellite gravimetry mission has been monitoring time‐varying changes of the Earth's gravitational field on a near‐global scale since 2002. One environmentally important signals to be detected is temporal variations induced by in distribution terrestrial water storage (i.e., hydrology). Since one Australia's precious resources, it logical monitor its distribution, GRACE offers such opportunity. second fourth releases (referred as RL02...
Geodetic imaging of interseismic coupling in subduction zones enhances our understanding seismic potential and hazard assessments, particularly low-seismicity regions where tectonic risks may be underestimated or remain unrecognized. This study focuses on the Western Makran Subduction Zone (WMSZ), Arabian plate converges with Eurasian plate. The WMSZ shows no significant thrust events at shallow depths, most seismicity occurring intermediate depths within downgoing Our approach begins...
AbstractIn this contribution, the iteratively reweighted total least squares (IRTLS) method is introduced as a robust estimation in errors-in-variables (EIV) models. The follow-up to (IRLS) that applied Gauss–Markov and/or Gauss–Helmert models, when observations are corrupted by gross errors (outliers). In relatively new class of namely EIV IRLS or other known methods geodetic literature cannot be directly applied. This because vector coefficient matrix model may falsified errors. IRTLS can...
Post-processing of complex altimetry-derived echo shapes is necessary over the Caspian Sea, in which altimetry-inferred level fluctuations, derived from on-board 'retrackers', represent errors within a wide boundary close to coastlines, i.e. up ~10–30 km. Four different techniques were implemented retrack 10 Hz radar waveforms TOPEX/Poseidon (T/P) mission and 20 its follow-on Jason-1. These include three previously introduced algorithms Off Center Gravity, standard NASA β-5, Threshold...
In order to study in the field of dynamics and continuous variations ionosphere, ionospheric measurement tools such as ionosondes, incoherent scatter radars, satellites, Global Positioning System (GPS) networks should be used. Total Electron Content (TEC) is a key parameter investigation identification ionosphere layer. From observations dual frequency GPS receivers, TEC can extracted. Ionospheric Maps (GIM) are auxiliary for on layer around world. It necessary produce regional map precise...
Satellite altimetry has enhanced the understanding of ocean dynamics through high-rate sampling and global coverage. However, land contamination bad reflection effects limit its accuracy. We present a geometrical method for retracking waveforms in coastal areas. Our follows assumption related to symmetrical reciprocal motion radar pulse. Based on this assumption, waveform is modelled as continuous differentiable third-order spline function, symmetry point function considered gate. The...
Satellite radar altimetry observations are used to derive short wavelength gravity anomaly fields over the Persian Gulf and Caspian Sea, where in situ ship-borne measurements have limited spatial coverage. In this study retracking algorithm 'Extrema Retracking' (ExtR) was employed improve sea surface height (SSH) that highly biased regions due land contaminations footprints of satellite observations. ExtR applied waveforms sampled by five missions: TOPEX/POSEIDON, JASON-1, JASON-2, GFO...
<p>The variations of gravity field have been analyzed in this article, order to find disturbances the vicinity recent great earthquakes epicenters including Chile (February 27, 2010), Tohoku-Oki (March 11, 2011) and Indian Ocean (April 2012) prior events. For purpose, 10 years long time series gravitational gradient components obtained from weekly Gravity Recovery And Climate Experiment (GRACE) solutions used. Some are independent GRACE stripy error amplify high frequency field....