TY - JOUR
T1 - First Demonstration of Spaceborne SAR Terrain Matching Curved Imaging with LJ2-01 Satellite
AU - Wang, Yan
AU - Wang, Xuan
AU - Sun, Hanwei
AU - Chen, Ke
AU - Zhang, Qingjun
AU - Guo, Qingrui
AU - Liu, Ziheng
AU - Zhao, Yong
AU - Gao, Heli
AU - Li, Bingyi
AU - He, Dehua
AU - Zhang, Guo
AU - Ding, Zegang
AU - Zeng, Tao
N1 - Publisher Copyright:
© 1980-2012 IEEE.
PY - 2024
Y1 - 2024
N2 - The swath of the conventional spaceborne synthetic aperture radar (SAR) is parallel-to-orbit, making it inefficient to observe long curved terrain, such as coastlines, railways, and so on. Imaging long curved terrains with the terrain matching (TM) curved swath is a promising technique for efficient data acquisition. The key feature is the employment of a long curved swath matching with the orientations of the long curved terrains. This article reports the first demonstration of the spaceborne SAR TM curved imaging with the LJ2-01 satellite. A TM curved swath of 161.7 km is imaged with an azimuth resolution of 0.6 m. The main technical contributions are as follows. First, a new electrical-mechanical-combined beam control method is proposed to achieve uniform azimuth resolution. Second, a new nonuniform pulse repetition frequency (PRF) sequence is used to mitigate the data loss caused by the violent spatial variation of the slant range. Third, a new swath-adaptive subaperture time-domain imaging algorithm is proposed for efficient TM curved swath imaging. These innovations contribute to successful data acquisition and imaging of the spaceborne SAR TM curved imaging with the LJ2-01 satellite.
AB - The swath of the conventional spaceborne synthetic aperture radar (SAR) is parallel-to-orbit, making it inefficient to observe long curved terrain, such as coastlines, railways, and so on. Imaging long curved terrains with the terrain matching (TM) curved swath is a promising technique for efficient data acquisition. The key feature is the employment of a long curved swath matching with the orientations of the long curved terrains. This article reports the first demonstration of the spaceborne SAR TM curved imaging with the LJ2-01 satellite. A TM curved swath of 161.7 km is imaged with an azimuth resolution of 0.6 m. The main technical contributions are as follows. First, a new electrical-mechanical-combined beam control method is proposed to achieve uniform azimuth resolution. Second, a new nonuniform pulse repetition frequency (PRF) sequence is used to mitigate the data loss caused by the violent spatial variation of the slant range. Third, a new swath-adaptive subaperture time-domain imaging algorithm is proposed for efficient TM curved swath imaging. These innovations contribute to successful data acquisition and imaging of the spaceborne SAR TM curved imaging with the LJ2-01 satellite.
KW - Electrical-mechanical-combined beam control
KW - LJ2-01 satellite
KW - nonuniform pulse repetition frequency (PRF) sequence
KW - spaceborne synthetic aperture radar (SAR)
KW - swath-adaptive subaperture time-domain imaging algorithm
KW - terrain matching (TM) curved imaging
UR - http://www.scopus.com/inward/record.url?scp=85200203673&partnerID=8YFLogxK
U2 - 10.1109/TGRS.2024.3430833
DO - 10.1109/TGRS.2024.3430833
M3 - Article
AN - SCOPUS:85200203673
SN - 0196-2892
VL - 62
JO - IEEE Transactions on Geoscience and Remote Sensing
JF - IEEE Transactions on Geoscience and Remote Sensing
M1 - 5220113
ER -