Analysis and Evaluation of the TOPSAR Topographic SAR Interferometer
Across-track interferometric SAR provides high resolution both horizontally and vertically which is of importance to topographic mapping applications.
SAR↗
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Results for “SARS”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Multi-polarization C-Band SAR signatures of artic sea ice
This paper presents results from a study of multiple-polarization C-band SAR signitures of sea ice for applications to sea ice mapping with ENVISAT ASAR data.
sea ice SAR C-band ENVISAT↗
Aseismic deformation of a fold-and-thrust belt imaged by SAR interferometry near Shahdad, southeast Iran
At depth, many fold-and-thrust belts are composed of a gently dipping, basal thrust fault and steeply dipping, shallower splay faults that terminate beneath folds at the surface. Movement on these buried faults is difficult to observe, but synthetic aperture radar (SAR) interferometry has imaged slip on at least 600 square kilometers of the Shahdad basal-thrust and splay-fault network in southeast Iran.
SAR interferometry salellite measurements fold and↗
Detections and Extraction of Buildings form Interferometric SAR Data
In this paper we present a complete procedure for the extraction and characterization of building structures starting from the three-dimensional (terrain elevation) data provided by interferometric SAR measurements.
SAR urban analysis 3D building extraction interfer↗
Rapid-Repeat SAR Imaging of the Ocean Surface: Can We Get Daily Observation
Imaging of the ocean surface with a synthetic aperture radar (SAR) provides unprecedented detailed views of the ocean's short wave field as it responds to interactions with the atmosphere, longer waves and currents.
SAR Ocean Surface Imaging↗
Adaptive Filtering of RFI in Wideband SAR Signals
The least-mean-square (LMS) adaptive filter is applied to suppress narrow-band radio-frequency interference (RFI) in wideband sythetic aperture radar (SAR) signals.
wideband SAR signals↗
Ice-shelf Dynamics Near the Front of Filchner-Ronne Ice Shelf, Antarctica, Revealed by SAR Interferometry
Fifteen synthetic-aperture radar (SAR) images of the Ronne Ice Shelf, Antarctica, obtained by the European Space Agency (ESA)'s Earth Remote Sensing satellites (ERS) 1 & 2 are used to study ice-shelf dynamics near two ends of the iceberg-calving front.
Ice-shelf Filchner-Ronne Ice Shelf FRIS SAR Interf↗
Ice-shelf Dynamics Near the Front of Filchner-Ronne Ice Shelf, Antarctica, Revealed by SAR Interferometry: Model/Interferogram Comparison
We compare Earth Remote Sensing (ERS) satellite synthetic-aperture radar (SAR) interferograms with artificial interferograms constructed using output of a finite-element ice-shelf flow model to study the dynamics of Filchner-Ronne Ice Shelf (FRIS) near Hemmen Ice Rise (HIR) where the iceberg-calving front itersects Berkener Island (BI).
Ice-shelf Filchner-Ronne Antarctica SAR Interferom↗
Comparison of Ice-shelf Creep Flow Simulations with Ice-front Motion of Filchner-Ronne Ice Shelf, Antarctica, Detected by SAR Interferometry
Comparison between numerical model ice-shelf flow simulations and synthetic aperture radar (SAR) interferograms is used to study the dynamics at the Hemmen Ice Rise (HIR) and Lassiter Coast (LC) corners of the iceberg-calving front of the Filchner-Ronne Ice Shelf (FRIS).
ice-shelf ice-front Filchner-Ronne ice shelf Antac↗
SAR Applications in the 21st Century
SAR image data from a variety of spaceborne and airborne sensors will be much more.
SAR↗
Alaska Satellite Facility ASF5 SAR Data Processing System Overview
The Alaska SAR Facility (ASF) situated at the University of Alaska Fairbanks (UAF) is currently undergoing an extensive development effort to increase its capabilities in handling new sensors and in the areas of throughput, data handling, archive, and distribution [15].
SAR↗
The Application of Airborne and Satellite SAR to Sea Ice Geophysical Investigations
The logistical difficulties of making regular oceanographic measurements in the polar oceans during winter make it necessary to employ remote-sensing techniques. Microwave synthetic aperture radar (SAR) offers day and night imaging, without impact from atmospheric conditions.
Satellite airborne SAR↗
Slip distribution of the 1997 Umbria-Marche earthquake sequence: joint inversion of GPS and SAR interferometry data
Study of the September-October 1997 Umbria-Marche earthquakes that took place in Italy. Use joint inversion of GPS and SAR interferometry data.
earthquake GPS SAR interferometry↗
Onboard FPGA-based SAR processing for future spaceborne systems
We present a real-time high-performance and fault-tolerant FPGA-based hardware architecture for the processing of synthetic aperture radar (SAR) images in future spaceborne system. In particular, we will discuss the integrated design approach, from top-level algorithm specifications and system requirements, design methodology, functional verification and performance validation, down to hardware design and implementation.
spaceborne systems↗
An L-band SAR for repeat pass deformation measurements on a UAV platform
We are proposing to develop a miniaturized polarimetric L-band synthetic aperture radar (SAR) for repeatpass differential interferometric measurements of deformation for rapidly deforming surfaces of geophysical interest such as volcanoes or earthquakes that is to be flown on a unmanned aerial vehicle (UAV or minimally piloted vehicle (MPV).
repeat pass interferometry↗
An L-band SAR for repeat pass deformation measurements on a UAV platform
We are proposing to develop a miniaturized polarimetric L-band synthetic aperture radar (SAR) for repeat-pass differential interferometric measurements of deformation for rapidly deforming surfaces of geophysical interest such as volcanoes or earthquakes that is to be flown on a unmanned aerial vehicle (UAV) or minimally piloted vehicle (MPV). Upon surveying the capabilities and availabilities of such aircraft, the Proteus aircraft and the ALTAIR UAV appear to meet our criteria in terms of payload capabilities, flying altitude, and endurance. To support the repeat pass deformation capability it is necessary to control flight track capability of the aircraft to be within a specified 10 m tube with a goal of 1 m. This requires real-time GPS control of the autopilot to achieve these objectives that has not been demonstrated on these aircraft. Based on the Proteus and ALTAIR's altitude of 13.7 km (45,000 ft), we are designing a fully polarimetric L-band radar with 80 MHz bandwidth and a 16 km range swath. The radar will have an active electronic beam steering antenna to achieve a Doppler centroid stability that is necessary for repeat-pass interferometry. This paper presents some of the trade studies for the platform, instrument and the expected science.
interferometers↗
Preliminary investigation of Zagros thrust-fold-belt deformation using SAR interferometry
Most of the Zagros deformation resulting from the convergence of Arabia and Eurasia takes place in the Southeast Zagros. To apply the SAR interferometry geodetic technique, a few ERS 1 & 2 satellite images were used to map this continuing deformation proven by GPS. Interferograms over 7 years show surprisingly high coherence. The unwrapped phases display a high correlation with topography reflecting atmospheric noise in addition to the desired tectonic signal. We estimate two simple linear trends and remove them from interferograms. The preliminary results show local uplift rates with a likely minimum of 1-2 mm/yr. These early crude results will be tested by more data in project No. 3174.
tectonics↗
Estimating tropical-forest density profiles from multibaseline interferometric SAR
Vertical profiles of forest density are potentially robust indicators of forest biomass, fire susceptibility and ecosystem function. Tropical forests, which are among the most dense and complicated targets for remote sensing, contain about 45% of the world's biomass. Remote sensing of tropical forest structure is therefore an important component to global biomass and carbon monitoring. This paper shows preliminary results of a multibasline interfereomtric SAR (InSAR) experiment over primary, secondary, and selectively logged forests at La Selva Biological Station in Costa Rica. The profile shown results from inverse Fourier transforming 8 of the 18 baselines acquired. A profile is shown compared to lidar and field measurements. Results are highly preliminary and for qualitative assessment only. Parameter estimation will eventually replace Fourier inversion as the means to producing profiles.
profiles↗