A5001633747- Synthetic Aperture Radar (SAR) Applications and Techniques
- Advanced SAR Imaging Techniques
- Soil Moisture and Remote Sensing
- Cryospheric studies and observations
- Microwave Imaging and Scattering Analysis
- Radar Systems and Signal Processing
- Arctic and Antarctic ice dynamics
- Structural Health Monitoring Techniques
- Distributed and Parallel Computing Systems
- Marine and environmental studies
- Antenna Design and Optimization
- Ecosystem dynamics and resilience
- Advanced Data Compression Techniques
- Radio Astronomy Observations and Technology
- Sparse and Compressive Sensing Techniques
- Ultrasonics and Acoustic Wave Propagation
- Geophysics and Gravity Measurements
- Spacecraft Design and Technology
- Parallel Computing and Optimization Techniques
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
2019-2024
The bistatic interferometric coherence is affected by different sources of error, among which volume decorrelation, quantifies the amount noise caused scattering mechanisms. This represents a key quantity not only for performance assessment synthetic aperture radar (SAR) products, but also large variety scientific applications, ranging from land cover classification to physical parameters estimation, such as ice structure, forest height, and biomass retrieval. magnitude decorrelation can be...
For the design of present and next-generation spaceborne SAR missions, constantly increasing data rates are being demanded, which impose stringent requirements in terms onboard memory downlink capacity. In this scenario, efficient quantization raw is primary importance, since utilized compression rate directly related to volume be stored transmitted ground and, at same time, it affects resulting imaging performance. paper, we introduce performance-optimized block-adaptive (PO-BAQ), a novel...
Staggered synthetic aperture radar (SAR) is an innovative SAR acquisition concept which exploits digital beamforming (DBF) in elevation to form multiple receive beams and continuous variation of the pulse repetition interval achieve high-resolution imaging a wide swath. requires azimuth oversampling higher than with constant (PRI), results increased volume data. In this article, we investigate use linear predictive coding, correlation properties exhibited by nonuniform raw data stream....
Frequency scanning (FScan) is an innovative acquisition mode for synthetic aperture radar (SAR) systems. The method based on the frequency-dependent beam pointing capabilities of phased array antennas, artificially increased via combined use true time delays and phase shifters within antenna. By this, typical limitations conventional SAR systems in terms achievable swath width azimuth resolution can be mitigated, so a wide imaged maintaining fine azimuthal resolution. In first part article,...
Next generation SAR systems will bring a huge improvement in terms of performance and coverage through the use large bandwidths digital beamforming techniques combination with multiple acquisition channels. This allow for overcoming limitations imposed by conventional imaging wide swaths and, at same time, finer resolutions. The significant improvements that can be achieved are associated volumes data, which, turn, set harder requirements onboard memory downlink capacity system.In this...
Nonlocal algorithms have been proven to be a very effective tool for the reconstruction of interferometric phase field in synthetic aperture radar images. The offset-compensated nonlocal filtering is recent concept proposed cope with problem rare patch effect which arises especially presence terrain slopes large topography variation. In this paper we assess quality different Digital Elevation Models (DEMs) generated by varying estimation algorithm. specific, aim at analyzing performance...
Present and future spaceborne synthetic aperture radar (SAR) missions are designed to acquire an increasingly large amount of onboard data. This is a consequence the use bandwidths, multiple polarizations, acquisition swath widths at fine spatial resolutions, which result in challenging requirements terms memory downlink capacity. In this scenario, SAR raw data quantization represents essential aspect, as it affects volume be stored transmitted ground well quality resulting products. Dynamic...
For upcoming spaceborne SAR mission the amount of data collected onboard is increasing, due to employment large bandwidths, multiple polarizations, and swath widths, which lead hard requirements in terms memory downlink capacity. In this context, raw quantization represents an essential aspect, since it affects both be stored transmitted ground quality resulting products. paper, a reduction approach based on predictive investigated context Tandem-L, DLR proposal for highly innovative...
For next-generation synthetic aperture radar (SAR) missions, an increasing volume of onboard data is going to be required, due the employment large band-widths, multiple polarizations, and swath widths, which leads hard requirements in terms memory downlink capacity. This paper presents novel methods for reduction context multi-azimuth channel (MAC) SAR staggered SAR, allow high-resolution imaging a wide by means different system architectures. In particular, such systems, pulse repetition...
<p>Covering about 30 percent of the Earth’s surface, forests are paramount importance for ecosystem. They act as effective carbon sinks, reducing concentration greenhouse gas in atmosphere, and help mitigating climate change effects. This delicate ecosystem is currently threatened degraded by anthropogenic activities natural hazards, such deforestation, agricultural activities, farming, fires, floods, winds, soil erosion. In an era dramatic changes ecosystems,...