TY - GEN
T1 - SPATIAL RESOLUTION IMPROVEMENT VIA RADAR PARAMETER ADJUSTMENT FOR EXTREMELY-HIGH-SQUINT SPOTLIGHT SAR
AU - Min, Rui
AU - Wang, Yan
AU - Ding, Zegang
AU - Li, Linghao
N1 - Publisher Copyright:
© 2021 IEEE.
PY - 2021
Y1 - 2021
N2 - The extremely-high-squint spotlight synthetic aperture radar (SAR) has been widely used in military and commercial fields. Due to the extremely-high-squint angle, the point spread function (PSF) used for SAR resolution evaluation suffers from severe distortion and thus results in non-uniform spatial resolution. To solve this problems, this paper proposes a novel radar parameter adjustment (RPA) method to correct the PSF distortion during the data acquisition. The mechanism is to achieve an orthogonal PSF by correcting the wavenumber spectrum distortion. In this case, the radar parameters, i.e., the center frequency and the chirp rate, vary at every azimuth sampling position. The proposed approach is validated via the computer simulations.
AB - The extremely-high-squint spotlight synthetic aperture radar (SAR) has been widely used in military and commercial fields. Due to the extremely-high-squint angle, the point spread function (PSF) used for SAR resolution evaluation suffers from severe distortion and thus results in non-uniform spatial resolution. To solve this problems, this paper proposes a novel radar parameter adjustment (RPA) method to correct the PSF distortion during the data acquisition. The mechanism is to achieve an orthogonal PSF by correcting the wavenumber spectrum distortion. In this case, the radar parameters, i.e., the center frequency and the chirp rate, vary at every azimuth sampling position. The proposed approach is validated via the computer simulations.
KW - Extremely-high-squint spotlight SAR
KW - Point spread function(PSF)
KW - Radar parameter adjustment (RPA)
KW - Resolution ellipse
UR - http://www.scopus.com/inward/record.url?scp=85122975417&partnerID=8YFLogxK
U2 - 10.1109/IGARSS47720.2021.9553486
DO - 10.1109/IGARSS47720.2021.9553486
M3 - Conference contribution
AN - SCOPUS:85122975417
T3 - International Geoscience and Remote Sensing Symposium (IGARSS)
SP - 2963
EP - 2966
BT - IGARSS 2021 - 2021 IEEE International Geoscience and Remote Sensing Symposium, Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2021 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2021
Y2 - 12 July 2021 through 16 July 2021
ER -