GROUND DEFORMATIONS MONITORING WITHIN RURAL AREAS USING SATELLITE RADAR INTERFEROMETRY METHOD

Estimation of ice-sheet motion using satellite radar interferometry: method and error analysis with application to Humboldt Glacier, Greenland

Journal of Glaciology ◽

10.3189/s0022143000003543 ◽

1996 ◽

Vol 42 (142) ◽

pp. 564-575 ◽

Cited By ~ 1

Author(s):

Ian Joughin ◽

Ron Kwok ◽

Mark Fahnestock

Keyword(s):

Ice Sheet ◽

Vertical Displacement ◽

Radar Interferometry ◽

Surface Slopes ◽

Component Velocity ◽

Interferometry Method ◽

Ice Velocity ◽

Motion Measurements ◽

Satellite Radar ◽

Insight Into

AbstractSatellite radar interferometry provides glaciologists with an important new tool for determining the motion and topography of large ice sheets. We examine the sources of error in interferometrically derived ice-motion measurements, including those errors due to inaccurate estimates of the interfero-metric baseline. Several simulations are used to assess baseline accuracy in terms of tie-point error and the number and distribution of tie points. These results give insight into how best to select tie points, and also demonstrate the level of accuracy that can be achieved. Examination of two representative cases likely to occur in mapping ice-sheet motion leads to the conclusion that with adequate tie-point information ice velocity can be measured accurately to within a few meters per year. A method to correct horizontal velocity estimates for the effect of vertical displacement using surface slopes is also developed. Finally, we estimate the single-component velocity field for an area on Humboldt Glacier, northern Greenland, using interferograms formed from ERS-1 SAR image. We estimatе that these velocity measurements are accurate to within 2.3 m year1.

Download Full-text

Estimation of ice-sheet motion using satellite radar interferometry: method and error analysis with application to Humboldt Glacier, Greenland

Journal of Glaciology ◽

10.1017/s0022143000003543 ◽

1996 ◽

Vol 42 (142) ◽

pp. 564-575 ◽

Cited By ~ 114

Author(s):

Ian Joughin ◽

Ron Kwok ◽

Mark Fahnestock

Keyword(s):

Ice Sheet ◽

Vertical Displacement ◽

Radar Interferometry ◽

Surface Slopes ◽

Component Velocity ◽

Interferometry Method ◽

Ice Velocity ◽

Motion Measurements ◽

Satellite Radar ◽

Insight Into

AbstractSatellite radar interferometry provides glaciologists with an important new tool for determining the motion and topography of large ice sheets. We examine the sources of error in interferometrically derived ice-motion measurements, including those errors due to inaccurate estimates of the interfero-metric baseline. Several simulations are used to assess baseline accuracy in terms of tie-point error and the number and distribution of tie points. These results give insight into how best to select tie points, and also demonstrate the level of accuracy that can be achieved. Examination of two representative cases likely to occur in mapping ice-sheet motion leads to the conclusion that with adequate tie-point information ice velocity can be measured accurately to within a few meters per year. A method to correct horizontal velocity estimates for the effect of vertical displacement using surface slopes is also developed. Finally, we estimate the single-component velocity field for an area on Humboldt Glacier, northern Greenland, using interferograms formed from ERS-1 SAR image. We estimatе that these velocity measurements are accurate to within 2.3 m year1.

Download Full-text

Pre-eruptive ground deformation of Azerbaijan mud volcanoes detected through satellite radar interferometry (DInSAR)

Tectonophysics ◽

10.1016/j.tecto.2014.10.005 ◽

2014 ◽

Vol 637 ◽

pp. 163-177 ◽

Cited By ~ 23

Author(s):

Benedetta Antonielli ◽

Oriol Monserrat ◽

Marco Bonini ◽

Gaia Righini ◽

Federico Sani ◽

...

Keyword(s):

Ground Deformation ◽

Radar Interferometry ◽

Mud Volcanoes ◽

Satellite Radar

Download Full-text

Measurement of ice-sheet topography using satellite-radar interferometry

Journal of Glaciology ◽

10.3189/s0022143000030483 ◽

1996 ◽

Vol 42 (140) ◽

pp. 10-22 ◽

Cited By ~ 2

Author(s):

Ian Joughin ◽

Dale Winebrenner ◽

Mark Fahnestock ◽

Ron Kwok ◽

William Krabill

Keyword(s):

Ice Sheets ◽

Ice Sheet ◽

Surface Displacement ◽

Horizontal Resolution ◽

Radar Interferometry ◽

Altimeter Data ◽

Laser Altimeter ◽

Digital Elevation ◽

Satellite Radar ◽

Ice Sheet Topography

AbstractDetailed digital elevation models (DEMs) do not exist for much of the Greenland and Antartic ice sheets. Radar altimetry is at present the primary, in many cases the only, source of topographic data over the ice sheets, but the horizontal resolution of such data is coarse. Satellite-radar interferometry uses the phase difference between pairs of synthetic aperture radar (SAR) images to measure both ice-sheet topography and surface displacement. We have applied this technique using ERS-1 SAR data to make detailed (i.e. 80 m horizontal resolution) maps of surface topography in a 100 km by 300 km strip in West Greenland, extending northward from just above Jakobshavns Isbræ. Comparison with а 76 km long line of airborne laser-altimeter data shows that We have achieved a relative accuracy of 2.5 m along the profile. These observations provide a detailed view of dynamically Supported topography near the margin of an ice sheet. In the final section We compare our estimate of topography with phase contours due to motion, and confirm our earlier analysis concerning vertical ice-sheet motion and complexity in ERS-1 SAR interferograms.

Download Full-text