Results 261 to 270 of about 174,118 (307)

The Capella Synthetic Aperture Radar Constellation

IEEE International Geoscience and Remote Sensing Symposium, 2018
The Capella constellation will consist of 36 agile synthetic aperture radars. Each radar will operate at an altitude of around 500 km in an approximately 90-minute polar orbit, providing average imaging revisit times of less than one hour.
G. Farquharson, W. Woods, C. Stringham, Navneet Sankarambadi, L. Riggi   +4 more
semanticscholar   +1 more source

Synthetic aperture radar (SAR)

2020
This chapter introduced the basic concepts of SAR and the principle of 2D target resolution. Obtaining high range resolution with wideband signal and high azimuth resolution with long synthetic array is the basis of the 2D high-resolution imaging. RDA is widely used in SAR imaging processing. Azimuth-translation invariance is the key of RDA.
Guang-Cai Sun, Liang Guo, Mengdao Xing
openaire   +2 more sources

Synthetic Aperture Radar Processing with GPGPU

IEEE Signal Processing Magazine, 2010
Synthetic aperture radar (SAR) processing is a complex task that involves advanced signal processing techniques and intense computational effort. While the first issue has now reached a mature stage, the question of how to produce accurately focused images in real time, without mainframe facilities, is still under debate.
di Bisceglie Maurizio, Di Santo Michele, Galdi Carmela, Lanari Riccardo, Ranaldo Nadia   +4 more
openaire   +3 more sources

Synthetic Aperture Radar

2009
We describe the design and implementation of a novel SIMD data-parallel algorithm for real time SAR quick-look image generation using the Cell Broadband Engine as found in the consumer Playstation 3 gaming console. Our implementation of this chain on the CELL system processes 1 frame of image data, reading a 1024x3072 pixel of (simulated) RAW ...
openaire   +2 more sources

Synthetic aperture radar equation

Proceedings of the IEEE, 1980
The synthetic aperture radar equation for extended diffuse clutter depends on the area of such clutter processed by the radar. It is shown here that approximating the illuminated area by the product of the range and azimuth lineal resolutions can give results which are optimistic or pessimistic, depending on the amount of range and azimuth weighting ...
openaire   +2 more sources

Spotlight Synthetic Aperture Radar

2012
The decades of development of synthetic aperture radar (SAR) have resulted in a family of remarkable signal processing techniques that are capable of producing imagery whose cross-range resolution is independent of range and much finer than is possible to achieve with any practically-deployable real-beam antenna.
openaire   +2 more sources

principles of synthetic aperture radar

Surveys in Geophysics, 2000
Synthetic Aperture Radar (SAR) is an active microwave imaging method. It operates independently of Sun illumination and cloud coverage. Current spaceborne systems use wavelengths of 3 to 25 cm and achieve resolutions of 10 to 50 m. The paper attempts to explain the basic SAR imaging principles using a minimum of mathematics.
openaire   +2 more sources

The synthetic aperture radar idea

2018
Another way to detect slow-moving tactical targets is by means of HRM coupled with some form of change detection between multiple images. The change detection methods are coherent change detection (CCD) and shadow detection, noncoherent change detection (NCD), video SAR, inverse SAR (ISAR) and synthetic monopulse.
openaire   +2 more sources

Change Detection in Synthetic Aperture Radar Images Based on Deep Neural Networks

IEEE Transactions on Neural Networks and Learning Systems, 2016
Maoguo Gong, Jiaojiao Zhao, Jia Liu, Q. Miao, L. Jiao   +4 more
semanticscholar   +1 more source

Synthetic Aperture Radar Interferometry

2010
In the past two decades INSAR technique (synthetic aperture radar interferometry) has been quickly developed and widely used for the study of topography (digital elevation model generation) and deformation (Earth surface monitoring). Synthetic aperture radar (SAR) is a coherent active microwave image instrument, which is used for mapping the scattering
openaire   +2 more sources