Synthetic aperture radar interferometry of Okmok volcano, Alaska: Radar observations
نویسندگان
چکیده
منابع مشابه
Synthetic aperture radar interferometry
Synthetic aperture radar (SAR) is a coherent active microwave imaging method. In remote sensing it is used for mapping the scattering properties of the Earth’s surface in the respective wavelength domain. Many physical and geometric parameters of the imaged scene contribute to the grey value of a SAR image pixel. Scene inversion suffers from this high ambiguity and requires SAR data taken at di...
متن کاملMagma flux at Okmok Volcano, Alaska, from a joint inversion of continuous GPS, campaign GPS, and interferometric synthetic aperture radar
[1] Volcano deformation is usually measured using satellite geodetic techniques including interferometric synthetic aperture radar (InSAR), campaign GPS, and continuous GPS. Differences in the spatial and temporal sampling of each system mean that most appropriate inversion scheme to determine the source parameters from each data set is different. Most studies either compare results from indepe...
متن کاملLava volume from the 1997 Eruption of Okmok volcano, Alaska, estimated using spaceborne and airborne interferometric synthetic aperture radar
Interferometric synthetic aperture radar (InSAR) techniques are used to calculate the volume of eruption at Okmok volcano, Alaska by constructing precise digital elevation models (DEMs) that represent volcano topography before and after the eruption. The pre-eruption DEM is generated using TOPSAR data where a three-dimensional multiaffined transformation is used to account for the misalignments...
متن کاملInterferometric synthetic aperture radar study of Okmok volcano, Alaska, 1992–2003: Magma supply dynamics and postemplacement lava flow deformation
[1] Okmok volcano, located in the central Aleutian arc, Alaska, is a dominantly basaltic complex topped with a 10-km-wide caldera that formed circa 2.05 ka. Okmok erupted several times during the 20th century, most recently in 1997; eruptions in 1945, 1958, and 1997 produced lava flows within the caldera. We used 80 interferometric synthetic aperture radar (InSAR) images (interferograms) to stu...
متن کاملStudy of subsidence of Abarkooh plain of Yazd using the Synthetic Aperture Radar Interferometry method
Abstract The population growth, the development of cities, industry, agriculture, and improper use of resources especially non-renewable resources have led human beings to face the danger of running out of resources. In some cases, in addition to the above, irreversible environmental and geological hazards have occurred due to the overdrawn of resources. Over extraction of groundwater resourc...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Solid Earth
سال: 2000
ISSN: 0148-0227
DOI: 10.1029/2000jb900034