Results 11 to 20 of about 120,225 (320)

Optimal Design of the Reflector Antenna to Improve Performance of C-Band Quad-Pol ScanSAR Systems [PDF]

Journal of Electromagnetic Engineering and Science, 2020
The performance of synthetic aperture radar (SAR) antenna determines the quality of images obtained from the spaceborne SAR system, and thus, SAR antenna should be designed to satisfy the target performance of SAR system.
Jung-Hwan Lim, Jae Wook Lee, Taek-Kyung Lee, Sang-Burm Ryu, Hyeon-Cheol Lee, Sang-Gyu Lee   +5 more
doaj   +1 more source

The normalised Sentinel-1 Global Backscatter Model, mapping Earth’s land surface with C-band microwaves

Scientific Data, 2021
Measurement(s) C-band radar backscatter • extent of permanent water bodies Technology Type(s) Synthetic Aperture Radar (SAR) • Synthetic Aperture Radar (SAR) normalised mosaic Factor Type(s) radar backscatter Sample Characteristic - Environment land ...
Bernhard Bauer-Marschallinger, Senmao Cao, Claudio Navacchi, Vahid Freeman, Felix Reuß, Dirk Geudtner, Björn Rommen, Francisco Ceba Vega, Paul Snoeij, Evert Attema, Christoph Reimer, Wolfgang Wagner   +11 more
doaj   +1 more source

Extensive High-Resolution Synthetic Aperture Radar (SAR) Data Analysis of Tropical Cyclones: Comparisons with SFMR Flights and Best Track

Monthly Weather Review, 2020
To produce more precise descriptions of air–sea exchanges under tropical cyclones (TCs), spaceborne synthetic aperture radar (SAR) instruments provide unique capabilities to probe the ocean surface conditions, at very high spatial resolution, and on ...
Clément Combot, A. Mouche, J. Knaff, Yili Zhao, Yuan Zhao, Léo Vinour, Y. Quilfen, B. Chapron   +7 more
semanticscholar   +1 more source

An Accurate Doppler Parameters Calculation Method of Geosynchronous SAR Considering Real-Time Zero-Doppler Centroid Control

Remote Sensing, 2021
The zero-Doppler centroid control in geosynchronous synthetic aperture radar (GEO SAR) is beneficial to reduce the imaging complexity (reduces range-azimuth coupling in received data), which can be realized by adjusting the radar line of sight (RLS).
Faguang Chang, Chunrui Yu, Dexin Li, Yifei Ji, Zhen Dong   +4 more
doaj   +1 more source

A New Classification Approach with Deep Mask R-CNN for Synthetic Aperture Radar Image Segmentation

Elektronika ir Elektrotechnika, 2020
In this paper, a hybrid classification approach which is combined with a more deep mask region-convolutional neural network and sparsity driven despeckling algorithm is proposed for synthetic aperture radar (SAR) image segmentation instead of the ...
Ridvan Yayla, Baha Sen
doaj   +1 more source

An FPGA based Real-Time Multi-Target Synthetic Aperture Radar Echoes Synthesizer

Journal of Engineering Technology and Applied Physics, 2020
This paper proposes a technique forsynthesizing multiple point target scatterer Synthetic Aperture Radar (SAR) echoesin real-time. Traditional approaches require high computation resources to calculate the complex SAR echoes due to itscomplex ...
Chua Ming Yam, Koo Voon Chet, Lim Heng Siong, Chan Yee Kit   +3 more
doaj   +1 more source

Ship Wake Component Detectability on Synthetic Aperture Radar (SAR) [PDF]

IGARSS 2020 - 2020 IEEE International Geoscience and Remote Sensing Symposium, 2020
This study presents an extension to recent ship wake detectability models based on SAR image analysis with machine learning. In contrast to our previous works, we model the detectability of certain wake components individually. The underlying data set is obtained by extracting possible ship wake signatures from SAR imagery by collocation with Automatic
Tings, Björn, Wiehle, Stefan, Jacobsen, Sven   +2 more
openaire   +1 more source

AUGMENTING THE PHILIPPINES’ DOST-ASTI’S POTENTIAL FLOOD EXTENTS MAPPING SERVICE WITH S-BAND NOVASAR-1 IMAGES [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
The Philippines’ Advanced Science and Technology Institute under the Department of Science and Technology (DOST-ASTI) has developed an AI-based and near real-time flood extent mapping service that utilizes C-Band Sentinel-1 SAR images.
J. B. L. C. Dumalag, J. B. L. C. Dumalag, K. L. S. Mariano, K. L. S. Mariano, N. R. Cadiz, N. R. Cadiz, A. E. Retamar, A. E. Retamar, J. C. Aceron, J. C. Aceron, M. M. Felicen, M. M. Felicen, M. C. Gelido, M. C. Gelido   +13 more
doaj   +1 more source

Comments on rendering synthetic aperture radar (SAR) images

Radar Sensor Technology XXV, 2021
Once Synthetic Aperture Radar (SAR) images are formed, they typically need to be stored in some file format which might restrict the dynamic range of what can be represented. Thereafter, for exploitation by human observers, the images might need to be displayed in a manner to reveal the subtle scene reflectivity characteristics the observer seeks ...
openaire   +2 more sources

Coherent Performance Analysis of the HJ-1-C Synthetic Aperture Radar

Leida xuebao, 2014
Synthetic Aperture Radar (SAR) is a coherent imaging radar. Hence, coherence is critical in SAR imaging. In a coherent system, several sources can degrade performance.
Li Hai-ying, Zhang Shan-shan, Li Shi-qiang, Zhang Hua-chun   +3 more
doaj   +1 more source