Monitoring of subsidence in Berezniki (Perm region) by SAR interferometry: I. Differential interferometry

2021 ◽  
Vol 22 (4) ◽  
pp. 73-89
Keyword(s):  
Sar Interferometry ◽  
Differential Interferometry ◽  
Perm Region

scholarly journals Topography and dynamics of Austfonna, Nordaustlandet, Svalbard, from SAR interferometry

1997 ◽  
Vol 24 ◽  
pp. 403-408 ◽  
Author(s):  
Beverley Unwin ◽  
Duncan Wingham
Keyword(s):  
Sar Interferometry ◽  
Synthetic Aperture ◽  
Drainage Basins ◽  
Ice Caps ◽  
Radar Images ◽  
Differential Interferometry ◽  
Digital Elevation ◽  
Radio Echo Sounding ◽  
Velocity Information ◽  
Elevation Model

The ice caps of Nordaustlandet, Svalbard, represent one of the largest glaciated areas outside of Antarctica and Greenland. They demonstrate a variety of different flow regimes within a comparatively compact area. We report on the first interferometrically derived elevation models and velocity visualisations of Austfonna. This initial investigation had three purposes: to determine whether the coherence and velocity characteristics of the region permitted interferometric survey; to determine the accuracy of derived elevations; and to assess the possibility of investigating time-variant flow of the more dynamic ice bodies using differential interferometry. A trio of coherent synthetic aperture radar images from ERS-1 ’s First Ice Phase was identified. The images were combined to separate the topographic and velocity components of the resultant interferograms. The topographic phase difference was used to produce a digital elevation model of Austfonna. Its accuracy relative to radio-echo-sounding derived tie-points is 8 m and its resolution 40 m. We also present synoptic views of the velocity field of three of Austfonna’s drainage basins, and comment on the extraction of useful velocity information.

scholarly journals SLOPE INSTABILITY MONITORING BY SPACE-BORNE SAR INTERFEROMETRY: PRELIMINARY RESULTS FROM PANACHAICO MOUNTAIN (WESTERN GREECE)

2017 ◽  
Vol 43 (3) ◽  
pp. 1301
Author(s):  
I. Parcharidis ◽  
M. Foumelis ◽  
P. Kourkouli
Keyword(s):  
Ground Deformation ◽  
Slope Instability ◽  
Sar Interferometry ◽  
Rock Outcrops ◽  
Preliminary Results ◽  
Synthetic Aperture Radar Interferometry ◽  
Point Target ◽  
Persistent Scatterers ◽  
Differential Interferometry ◽  
The City

Space borne differential synthetic aperture radar interferometry (DInSAR) has already proven its potential for mapping ground deformation phenomena, e.g. earthquakes, volcano dynamics, etc covering in continuity large areas. The innovative Persistent Scatterers Interferometry (PSI) technique, which overcomes several limitations of conventional SAR differential interferometry especially for applications in landslide studies, is suitable for monitoring slope deformations with millimetric precision. With PSI technique we detect the deformation, for long periods, that occur in an area as average annual deformation (mm/y) and is not spatially continuous but in terms of points (point targets). The aim of this study is to present preliminary results on the monitoring of slope instability in Panachaiko Mountain and particularly of the slopes facing the city of Patras. For this purpose we processed and analysed 42 ERS 1 and ERS 2 SAR scenes acquired in the time span 1992 and 2001, by applying the Interferometric Point Target Analysis algorithm. Point target reflectors with stable radar response over time were selected. In this case most of the point targets correspond to buildings of the local settlements or to rock outcrops. Additionally, millimetric target displacements along the line of sight direction were detected allowing measurements of slow terrain motion.

scholarly journals Topography and dynamics of Austfonna, Nordaustlandet, Svalbard, from SAR interferometry

1997 ◽  
Vol 24 ◽  
pp. 403-408 ◽  
Author(s):  
Beverley Unwin ◽  
Duncan Wingham
Keyword(s):  
Sar Interferometry ◽  
Synthetic Aperture ◽  
Drainage Basins ◽  
Ice Caps ◽  
Radar Images ◽  
Differential Interferometry ◽  
Digital Elevation ◽  
Radio Echo Sounding ◽  
Velocity Information ◽  
Elevation Model

The ice caps of Nordaustlandet, Svalbard, represent one of the largest glaciated areas outside of Antarctica and Greenland. They demonstrate a variety of different flow regimes within a comparatively compact area. We report on the first interferometrically derived elevation models and velocity visualisations of Austfonna. This initial investigation had three purposes: to determine whether the coherence and velocity characteristics of the region permitted interferometric survey; to determine the accuracy of derived elevations; and to assess the possibility of investigating time-variant flow of the more dynamic ice bodies using differential interferometry. A trio of coherent synthetic aperture radar images from ERS-1 ’s First Ice Phase was identified. The images were combined to separate the topographic and velocity components of the resultant interferograms. The topographic phase difference was used to produce a digital elevation model of Austfonna. Its accuracy relative to radio-echo-sounding derived tie-points is 8 m and its resolution 40 m. We also present synoptic views of the velocity field of three of Austfonna’s drainage basins, and comment on the extraction of useful velocity information.

scholarly journals Earthquake-induced deformation estimation of earth dam by multitemporal SAR interferometry: the Mornos Dam case (Central Greece)

2014 ◽  
Vol 2 (12) ◽  
pp. 7807-7835
Author(s):  
S. Neokosmidis ◽  
P. Elias ◽  
I. Parcharidis ◽  
P. Briole
Keyword(s):  
Singular Value ◽  
Sar Interferometry ◽  
Earth Dam ◽  
Line Of Sight ◽  
Seismic Events ◽  
Maximum Deformation ◽  
Central Greece ◽  
Differential Interferometry ◽  
Interferometry Method ◽  
Value Decomposition

Abstract. The scope of this paper concerns the investigation of Mornos earth Dam (Central Greece) deformation induced by major earthquake events occur in the broader area. For this purpose multitemporal SAR interferometry method was used. Specifically, the technique of Differential Interferometry SBAS and for the time series analysis the Singular Value Decomposition algorithm were applied. The data used were ascending and descending acquisitions of AMI / ERS-1 & 2 and ASAR / ENVISAT scenes covering the period 1993–2010. Five very strong seismic events with epicenters close to the dam, at the same period, were consider as potential sources of deformation. Lake level changes were also considered as an additional factor of induced deformation. Results show a maximum deformation rate of 10 cm along the line of sight for the whole period. Although the observed deformation appears to be due to changes in water level following a particular pattern, there are discontinuous over time which coincide with specific seismic events.

Investigations on cw CO2-laser induced welding plasmas using differential interferometry

1999 ◽  
Author(s):  
Henrik Schittenhelm ◽  
Jürgen Müller ◽  
Peter Berger ◽  
Helmut Hügel
Keyword(s):  
Co2 Laser ◽  
Differential Interferometry ◽  
Cw Co2 Laser

Necessity to use novae criteria for prediction of oil fields and gas occurrence in the Perm region

2018 ◽  
pp. 40-43
Author(s):  
I.S. Putilov ◽  
◽  
V.I. Galkin ◽  
E.V. Pyatunina ◽  
◽  
...  
Keyword(s):  
Oil Fields ◽  
Gas Occurrence ◽  
Perm Region

Demonstration of Two-Point Focused Laser Differential Interferometry (2pFLDI) in a Mach 18 flow

2021 ◽  
Author(s):  
Andrew Ceruzzi ◽  
Brianne McManamen ◽  
Christopher P. Cadou
Keyword(s):  
Differential Interferometry
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