Results 41 to 50 of about 730,674 (291)
Design and testing method of imaging system based on FMCW circular scanning SAR
Dianzi Jishu Yingyong, 2018 In order to achieve high resolution imaging with different distances, a target range direction detection system is designed and tested under the frequency modulated continuous wave(FMCW) circular scanning synthetic aperture radar(SAR) system.
Liu Lianghuan +2 more
doaj +1 more source
Fractal Models for SAR images [PDF]
, 2011 In this thesis the modeling of SAR (Synthetic Aperture Radar) images of natural surfaces described via fractal models is dealt with. A complete theoretical forward model linking the parameters describing the scene observed by the sensor to the stochastic
Zinno, Ivana
core +1 more source
A Focusing Algorithm for Circular SAR Based on Phase Error Estimation in Image Domain
Leida xuebao, 2015 Residual motion error is common in high-resolution circular Synthetic Aperture Radar (SAR) image defocusing. The Signal-to-Clutter Ratio (SCR) in echo data domain is relatively low; thus, the phase error spans several range bins.
Guo Zhen-yu, Lin Yun, Hong Wen
doaj +1 more source
Advanced Digital Beamforming Concepts for Future SAR Systems [PDF]
, 2010 This paper reviews advanced multi-channel SAR system concepts for the imaging of wide swaths with high resolution. Several novel system architectures employing both direct radiating arrays and reflector antennas fed by a digital array are introduced ...
A. Patyuchenko +13 more
core +1 more source
A Focusing Method of Buildings for Airborne Circular SAR
Remote SensingAirborne circular synthetic aperture radar (CSAR) can realize high-resolution imaging of the scene over 360 degrees azimuth angle variation. Aiming at the problem of focusing of buildings for the airborne CSAR, this paper first analyzes the phase errors of CSAR buildings focusing in detail, and the analytic relationship between the scatterer height and
Dong Feng 0001 +4 more
openaire +2 more sources
Applications of Time-Domain Back-Projection SAR Processing in the Airborne Case [PDF]
, 2008 The Back-Projection Algorithm is a SAR processing approach that uses time-domain convolution of the SAR data in order to perform SAR focusing. Some benefits of this approach are exact inversion, ideal motion compensation including topography information ...
Prats, Pau +2 more
core
Liver organoids: modelling complexity in homeostasis and disease
FEBS Letters, EarlyView.Studying liver in vitro has been challenging because simple 2D cell cultures fail to capture liver's cellular and architectural complexity. To bridge this gap, scientists increasingly use organoids, 3D liver models which better mimic liver composition and function. This review examines recent advances in liver organoid complexity and realism, discusses
Anna M. Dowbaj, Meritxell Huch
wiley +1 more source
SAR Ground Small Target Detection and Recognition Methods Via Micro‑small UAVs
Nanjing Hangkong Hangtian Daxue XuebaoThe radar detection and imaging team at Nanjing University of Aeronautics and Astronautics （NUAA） has developed a circular synthetic aperture radar （SAR） dataset for over ten types of typical military targets， including tanks， armored vehicles， and ...
ZHU Daiyin +10 more
doaj +1 more source
F-SAR – DLR’s advanced airborne SAR system onboard DO228 [PDF]
, 2008 The Microwaves and Radar Institute of the German Aerospace Center (DLR) is known for its consistent work on the field of airborne synthetic aperture radar and its application.
Nottensteiner, Anton +5 more
core
High resolution PolInSAR with the ground-based SAR (GB-SAR) System: measurement and modelling [PDF]
, 2006 Ground-based work is necessary for a comprehensive assessment of the operational potential and limitations of PolInSAR in airborne and satellite SAR applications. A study is made of the performance and usefulness of the UK’s Ground-Based SAR (GB-SAR)
Morrison, Keith +3 more
core +1 more source