Results 61 to 70 of about 917 (184)

A New Age of SAR: How Can Commercial Smallsat Constellations Contribute to NASA's Surface Deformation and Change Mission?

Earth and Space Science, Volume 12, Issue 1, January 2025.
Abstract In response to the 2017 Decadal Survey, NASA conducted a five‐year study on the Surface Deformation and Change (SDC) designated observable to study potential mission concepts. As part of the SDC mission study, the Commercial Synthetic Aperture Radar (ComSAR) subgroup was tasked with evaluating the current landscape of the SAR and ...
Stacey A. Huang, Batuhan Osmanoğlu, Bernd Scheuchl, Shadi Oveisgharan, Jeanne M. Sauber, MinJeong Jo, Ala Khazendar, Ekaterina Tymofyeyeva, Betsy Wusk, Arif Albayrak   +9 more
wiley   +1 more source

Spaceborne Reflector SAR Systems with Digital Beamforming

, 2012
Spaceborne Synthetic Aperture Radar (SAR) imaging enters an era where increasingly short revisit times, or large swath widths, respectively, and high spatial resolutions are requested.
Patyuchenko, Anton, Huber, Sigurd, Moreira, Alberto, Younis, Marwan, Krieger, Gerhard   +4 more
core   +1 more source

Raw Data Simulation Under Undulating Terrain for Bistatic SAR With Arbitrary Configuration

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Raw data simulation is very important for system parameter design, performance evaluation, and route planning of bistatic synthetic aperture radar (SAR).
Wenchao Li, Lei Wang, Dan Liu, Tianfu Chen, Zhongyu Li, Junjie Wu, Haiguang Yang, Jianyu Yang   +7 more
doaj   +1 more source

An ISAR target motion estimation algorithm based on a differential semblance criterion

Electronics Letters, Volume 61, Issue 1, January/December 2025.
This study presents a novel approach for improving rotational motion estimation in multistatic Inverse Synthetic Aperture Radar (ISAR) imaging through a Differential Semblance Optimization (DSO) criterion. By reducing discrepancies across images from multiple transmitter–receiver pairs, our method enables precise yaw rotation estimation and produces ...
D. P. Huxley, F. M. Watson, W. R. B. Lionheart   +2 more
wiley   +1 more source

Interferometric Calibration Model for the LuTan-1 Mission: Enhancing Digital Elevation Model Accuracy

Remote Sensing
The LuTan-1 (LT-1) mission, China’s first civilian bistatic spaceborne Synthetic Aperture Radar (SAR) mission, comprises two L-band SAR satellites.
Jingwen Mou, Yu Wang, Jun Hong, Yachao Wang, Aichun Wang, Shiyu Sun, Guikun Liu   +6 more
doaj   +1 more source

Multistatic Synthetic Aperture Radar Autofocus for Back Projection Imaging of a Moving Target

Electronics Letters, Volume 61, Issue 1, January/December 2025.
This paper presents a new metric‐based autofocus approach, called Localised Threshold Sharpness (LTS), which employs Multistatic SAR data to localise and focus a target moving with up to six degrees of freedom motion on a real‐time, pulse‐by‐pulse basis.
Anmol Rattan, Daniel Andre, Mark Finnis
wiley   +1 more source

Advanced Interferometric SAR Techniques with TanDEM-X

, 2008
TanDEM-X is an innovative mission with a TerraSAR-X add-on satellite for high-resolution singlepass SAR interferometry. The TanDEM-X mission has the primary objective of generating a consistent, global DEM with an unprecedented accuracy according to the ...
Hajnsek, Irena, Fiedler, Hauke, Hauke Fiedler, Krieger, Gerhard, Irena Hajnsek, Marwan Younis, Manfred Zink, Werner, Marian, Alberto Moreira, Zink, Manfred, Moreira, Alberto, Younis, Marwan, Gerhard Krieger, Marian Werner   +13 more
core   +1 more source

Near-Space Microwave Radar Remote Sensing: Potentials and Challenge Analysis

Remote Sensing, 2010
Near-space, defined as the region between 20 km and 100 km, offers many new capabilities that are not accessible to low earth orbit (LEO) satellites and airplanes, because it is above storm and not constrained by either the orbital mechanics of ...
Qicong Peng, Jingye Cai, Wen-Qin Wang
doaj   +1 more source

Ionospheric Faraday Rotation Angle Estimation for Bistatic Spaceborne SAR

Electronics Letters, Volume 61, Issue 1, January/December 2025.
This paper proposes a Faraday rotation angle estimation method for bistatic spaceborne SAR. The effectiveness of the method is verified through simulation experiments and the performance of the method is analysed. Under different SNR and filtering window sizes, the estimation error range is 0.02°–0.26°. ABSTRACT Bistatic synthetic aperture radar (SAR)
Kailun Zhang, Zhuo Li
wiley   +1 more source

Analysis of Methods for Reconstructing Periodically Missed SAR Data Acquired Close to Nyquist

, 2012
The cooperative nature of the TanDEM-X mission bistatic operation allows the periodically exchange of information between transmitter and receiver over the SAR acquisition.
Marc Rodriguez-Cassola, Andreas Reigber, Pau Prats, Prats, Pau, Reigber, Andreas, Rodriguez-Cassola, Marc, Pinheiro, Muriel, Muriel Pinheiro   +7 more
core   +1 more source