TY - GEN
T1 - Accurate analysis method of background ionosphere effects on Geosynchronous SAR focusing
AU - Tian, Ye
AU - Hu, Cheng
AU - Zhang, Kai
AU - Long, Teng
AU - Zeng, Tao
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/8/4
Y1 - 2015/8/4
N2 - The background ionosphere time variance within the extremely long integration time of Geosynchronous Synthetic Aperture Radar (GEO SAR) needs to be considered for GEO SAR focusing. Meanwhile, because of the curved trajectory and the very complex geometry relationship between satellite motion and earth rotation, the traditional analysis method of background ionosphere on LEO SAR imaging will no longer suitable in GEO SAR. In this paper, a GEO SAR signal model is proposed to describe the effects of total electron content (TEC) variance within the long integration time. Then, a GEO SAR signal two-dimensional spectrum under the effects of background ionosphere is derived for the first time. The GEO SAR defocusing phase errors are derived analytically. At last, the US Total Electron Content (US-TEC) data are used and the focusing results are presented, verifying the analysis.
AB - The background ionosphere time variance within the extremely long integration time of Geosynchronous Synthetic Aperture Radar (GEO SAR) needs to be considered for GEO SAR focusing. Meanwhile, because of the curved trajectory and the very complex geometry relationship between satellite motion and earth rotation, the traditional analysis method of background ionosphere on LEO SAR imaging will no longer suitable in GEO SAR. In this paper, a GEO SAR signal model is proposed to describe the effects of total electron content (TEC) variance within the long integration time. Then, a GEO SAR signal two-dimensional spectrum under the effects of background ionosphere is derived for the first time. The GEO SAR defocusing phase errors are derived analytically. At last, the US Total Electron Content (US-TEC) data are used and the focusing results are presented, verifying the analysis.
KW - Background Ionosphere
KW - Focusing
KW - GEO SAR
UR - http://www.scopus.com/inward/record.url?scp=84946035017&partnerID=8YFLogxK
U2 - 10.1109/ICASSP.2015.7178247
DO - 10.1109/ICASSP.2015.7178247
M3 - Conference contribution
AN - SCOPUS:84946035017
T3 - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
SP - 1633
EP - 1636
BT - 2015 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2015 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 40th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2015
Y2 - 19 April 2014 through 24 April 2014
ER -