- document
-
Hu, F. (author), Helfer, K.C. (author), Siebesma, A.P. (author), Hanssen, R.F. (author)Atmospheric delay has a profound impact on synthetic aperture radar (SAR) interferometry, inducing a spatial signal that significantly devaluates interferometric products. While the wide-scale variability of the atmosphere can be adequately modeled with global or regional weather models, it is especially the turbulent and convective part of the...journal article 2022
- document
-
van Natijne, A.L. (author), Bogaard, T.A. (author), van Leijen, F.J. (author), Hanssen, R.F. (author), Lindenbergh, R.C. (author)Landslides are a major geohazard in hilly and mountainous environments. In-situ inspection of downslope motion is costly, sometimes dangerous and, requires prior knowledge of the existence of a landslide. Remote sensing from space is a way to detect and characterize landslides systematically at large scale. Interferometric Synthetic Aperture...journal article 2022
- document
-
Czikhardt, Richard (author), van der Marel, H. (author), van Leijen, F.J. (author), Hanssen, R.F. (author)The estimation of Signal-to-Clutter Ratio (SCR) of a radar point target, such as a corner reflector, is an essential step for synthetic aperture radar (SAR) interferometry and positioning, as it influences the phase measurement variance as well as the absolute positioning precision. The standard method to estimate the SCR of a point target...journal article 2021
- document
-
Martins, Joana E. (author), Hooper, A.J. (author), Hanssen, R.F. (author)After decades of oil, gas, and coal exploitation, we have learned about some of the unpleasant aftereffects of subsurface resource exploration. Adverse long-term impacts, some known during exploration periods, others only afterwards, may include induced seismicity, land subsidence, or even sinkholes. While geothermal is currently seen as a...conference paper 2021
- document
-
Békési, Eszter (author), Fokker, Peter A. (author), Martins, Joana E. (author), Norini, Gianluca (author), Wees, Jan-Diederik van (author)We investigate ground movements induced by the 8 February 2016, Mw=4.2 earthquake at the Los Humeros Geothermal Field (Mexico) using Sentinel-1 radar interferometry. Previous estimated focal mechanism solution based on seismic data with a hypocentral depth of 1900 m could not resolve the measured coseismic surface deformation pattern. In this...journal article 2021
- document
-
Reinders, K.J. (author), Hanssen, R.F. (author), van Leijen, F.J. (author), Korff, M. (author)In this work, we investigate if, when, and how satellite InSAR can be used for evaluating surface settlements that occur during shield tunnelling in soft soil areas. We evaluate the applicability of InSAR prior, during, and after tunnel construction. Special emphasis is placed on the influence of the InSAR phase ambiguities in relation to short...journal article 2021
- document
-
Ranjgar, Babak (author), Razavi-Termeh, Seyed Vahid (author), Foroughnia, Fatemeh (author), Sadeghi-Niaraki, Abolghasem (author), Perissin, Daniele (author)In this paper, land subsidence susceptibility was assessed for Shahryar County in Iran using the adaptive neuro-fuzzy inference system (ANFIS) machine learning algorithm. Another aim of the present paper was to assess if ensembles of ANFIS with two meta-heuristic algorithms (imperialist competitive algorithm (ICA) and gray wolf optimization ...journal article 2021
- document
-
Tarighat, Fereshteh (author), Foroughnia, Fatemeh (author), Perissin, Daniele (author)The Tehran basin has been increasingly affected by subsidence during the last few decades due to groundwater withdrawal. Hence, the study of the strength of the power towers (PTs) of transmission lines, as vital structures, is an important subject. In this paper, the persistent scatterer interferometry (PSI) method was applied on data stacks...journal article 2021
- document
-
Bemelmans, M.J.W. (author), de Zeeuw-van Dalfsen, E. (author), Poland, Michael P. (author), Johanson, Ingrid A. (author)We use ground and space geodetic data to study surface deformation at Kīlauea Volcano from January to September 2015. This period includes an episode of heightened activity in April and May 2015 that culminated in a magmatic intrusion beneath the volcano's summit. The data set consists of Global Navigation Satellite System (GNSS), tilt,...journal article 2021
- document
-
Nikaein, T. (author), Iannini, L. (author), Molijn, R.A. (author), Lopez Dekker, F.J. (author)Synthetic aperture radar (SAR) acquisitions are mainly deemed suitable for mapping dynamic land-cover and land-use scenarios due to their timeliness and reliability. This particularly applies to Sentinel-1 imagery. Nevertheless, the accurate mapping of regions characterized by a mixture of crops and grasses can still represent a challenge....journal article 2021
- document
-
Czikhardt, Richard (author), van der Marel, H. (author), Papco, Juraj (author)Artificial radar reflectors, such as corner reflectors or transponders, are commonly used for radiometric and geometric Synthetic Aperture Radar (SAR) sensor calibration, SAR interferometry (InSAR) applications over areas with few natural coherent scatterers, and InSAR datum connection and geodetic integration. Despite the current abundance...journal article 2021
- document
-
Macchiarulo, V. (author), Milillo, Pietro (author), DeJong, Matthew J. (author), González Martí, Javier (author), Sánchez, Jordi (author), Giardina, Giorgia (author)Structural deformation monitoring is crucial for the identification of early signs of tunnelling-induced damage to adjacent structures and for the improvement of current damage assessment procedures. Satellite multi-temporal interferometric synthetic aperture radar (MT-InSAR) techniques enable measurement of building displacements over time...journal article 2021
- document
-
Amani, Meisam (author), Poncos, Valentin (author), Brisco, Brian (author), Foroughnia, Fatemeh (author), Delancey, Evan R. (author), Ranjbar, Sadegh (author)Wetlands are valuable natural resources which provide numerous services to the environment. Many studies have demonstrated the potential of various types of remote sensing datasets and techniques for wetland mapping and change analysis. However, there are a relatively low number of studies that have investigated the application of the...journal article 2021
- document
-
Yang, M. (author)Multi-epoch Synthetic Aperture Radar Interferometry (InSAR) is widely used to estimate displacements of selected scatterers from phase observations. However, their interpretation needs a connection to objects in the real world. <br/><br/>To associate InSAR scatterers to their corresponding geo-objects, it is necessary to (i) accurately estimate...doctoral thesis 2020
- document
-
Özer, I.E. (author)Flood defense systems are critical in protecting against catastrophic events which often lead to significant damage, fatalities or substantial socio-economic and environmental impact. Even though levees form a significant part of the existing flood defense systems, there is a limited knowledge of the different levee behavior processes and the...doctoral thesis 2020
- document
-
Minh, Dinh Ho Tong (author), Hanssen, R.F. (author), Rocca, Fabio (author)The research and improvement of methods to be used for deformation measurements from space is a challenge. From the previous 20 years, time series Synthetic Aperture Radar (SAR) interferometry techniques have proved for their ability to provide millimeter-scale deformation measurements over time. This paper aims to provide a review of such...journal article 2020
- document
-
Milillo, Pietro (author), Giardina, Giorgia (author), Perissin, Daniele (author), Milillo, Giovanni (author), Coletta, Alessandro (author), Terranova, Carlo (author)We would like to thank our colleagues for their comment, as we believe that this discussion further highlights the importance of innovative research in the emerging field of InSAR applications to civil engineering structures. We discuss the statement from Lanari et al. (2020): “Our analysis shows that, although both the SBAS and the TomoSAR...journal article 2020
- document
-
Chen, Zhiyang (author), Dong, Xichao (author), Li, Y. (author), Hu, Cheng (author)The single-pass geosynchronous synthetic aperture radar interferometry (GEO InSAR) adopts the formation of a slave satellite accompanying the master satellite, which can reduce the temporal decorrelation caused by atmospheric disturbance and observation time gap between repeated tracks. Current formation design methods for spaceborne SAR are...journal article 2020
- document
-
van de Kerkhof, B. (author), Pankratius, Victor (author), Chang, Ling (author), Van Swol, Rob (author), Hanssen, R.F. (author)Satellite-based persistent scatterer satellite radar interferometry facilitates the monitoring of deformations of the earth's surface and objects on it. A challenge in data acquisition is the handling of large numbers of coherent radar scatterers. The behavior of each scatterer is time dependent and is influenced by changes in deformation and...journal article 2020
- document
-
Haji Aghajany, S. (author), Amerian, Yazdan (author)Atmospheric phase screen (APS) is one of the main error sources of interferometric synthetic aperture radar (InSAR) measurements. In order to accurately retrieve displacement fields, it is necessary to use advanced methods to eliminate the tropospheric effect of interferograms. In this paper, the land subsidence in Kurdistan province of Iran...journal article 2020