An improved CS algorithm based on the curved trajectory in geosynchronous SAR

C Hu, Z Liu, T Long - IEEE Journal of selected topics in applied …, 2012 - ieeexplore.ieee.org
In Geosynchronous (GEO) Synthetic Aperture Radar (SAR), the linear trajectory model fits
the actual slant range history in a poor approximation. For example, when the satellite …

An improved nonlinear chirp scaling algorithm based on curved trajectory in geosynchronous SAR

C Hu, T Long, Y Tian - Progress In Electromagnetics Research, 2013 - jpier.org
Geosynchronous synthetic aperture radar (GEO SAR) has the characteristics of long
aperture time and large imaging area. Therefore, the conventional imaging algorithm in Low …

Chirp scaling algorithm for GEO SAR based on fourth-order range equation

M Bao, MD Xing, YC Li - Electronics letters, 2012 - IET
For a synthetic aperture radar (SAR) onboard a geosynchronous-earth-orbit (GEO) satellite,
the track can be curvilinear. Thus, the validity of imaging algorithms based on the …

The accurate focusing and resolution analysis method in geosynchronous SAR

C Hu, T Long, T Zeng, F Liu, Z Liu - IEEE Transactions on …, 2011 - ieeexplore.ieee.org
In Geosynchronous SAR (GEO SAR), because of the increase of orbit height, the signal
propagation delay time reaches up to hundreds of milliseconds, and the synthetic aperture …

Generalized omega-K algorithm for geosynchronous SAR image formation

B Hu, Y Jiang, S Zhang, Y Zhang… - IEEE Geoscience and …, 2015 - ieeexplore.ieee.org
Geosynchronous synthetic aperture radar (GEO SAR) data focusing is a more challenging
and difficult task than the low earth orbit (LEO) SAR due to the strong 2-D coupling of echo …

A 2-D space-variant chirp scaling algorithm based on the RCM equalization and subband synthesis to process geosynchronous SAR data

GC Sun, M Xing, Y Wang, J Yang… - IEEE Transactions on …, 2013 - ieeexplore.ieee.org
A space-variant chirp scaling algorithm based on the range cell migration (RCM)
equalization and azimuth subband synthesis has been studied to process simulated …

An improved frequency domain focusing method in geosynchronous SAR

C Hu, T Long, Z Liu, T Zeng… - IEEE Transactions on …, 2013 - ieeexplore.ieee.org
Geosynchronous (GEO) SAR has been proposed as a means for obtaining observations of
the Earth with finer temporal sampling than possible with a single satellite from a lower orbit …

Modeling and processing of two-dimensional spatial-variant geosynchronous SAR data

D Li, M Wu, Z Sun, F He, Z Dong - IEEE Journal of Selected …, 2015 - ieeexplore.ieee.org
Imaging of spatial-variant geosynchronous synthetic aperture radar (GEO SAR) in the L
band with long integration time is discussed. To compensate for spatial variances in both …

Motion and Doppler characteristics analysis based on circular motion model in geosynchronous SAR

T Zeng, W Yin, Z Ding, T Long - IEEE Journal of Selected …, 2015 - ieeexplore.ieee.org
The Doppler characteristics of geosynchronous synthetic aperture radar (GEO SAR) cannot
be explained by the conventional linear motion model (LMM), and the work modes of GEO …

A modified frequency domain algorithm based on optimal azimuth quadratic factor compensation for geosynchronous SAR imaging

Z Ding, B Shu, W Yin, T Zeng… - IEEE Journal of Selected …, 2015 - ieeexplore.ieee.org
The Doppler rate of geosynchronous synthetic aperture radar (GEO SAR) may be positive,
negative, or even zero at different orbital positions. When the Doppler rate is zero or near …