TY - GEN
T1 - Impacts of ionospheric temporal variability on L-band GEO SAR imaging
AU - Zhang, Qingbo
AU - Yu, Ze
AU - Xiao, Peng
N1 - Publisher Copyright:
© 2016 IEEE.
PY - 2016/11/1
Y1 - 2016/11/1
N2 - The integration aperture time of Geosynchronous synthetic aperture radar (GEO SAR) is much longer than that of LEO SAR. Compared with LEO SAR, of which TEC is assumed to be constant, the time-varying ionospheric effects on GEO SAR imaging can't be ignored, and GEO SAR has the advantages of shorter repeat period and wider swath. Due to the wide swath of GEO SAR, it is necessary to take the effects of ionospheric temporal variance at different targets in a large scene into consideration. The letter analyzes the time-varying ionospheric effects on GEO SAR imaging. Finally, the USTEC data is used to analyze the time-varying effects at whole orbit of GEO SAR, and explore whether the effects are consistent at different targets in a large scene. Simulation results show GEO SAR azimuth imaging performance becomes deteriorated and defocused, and the effects are different at different positions in a large scene.
AB - The integration aperture time of Geosynchronous synthetic aperture radar (GEO SAR) is much longer than that of LEO SAR. Compared with LEO SAR, of which TEC is assumed to be constant, the time-varying ionospheric effects on GEO SAR imaging can't be ignored, and GEO SAR has the advantages of shorter repeat period and wider swath. Due to the wide swath of GEO SAR, it is necessary to take the effects of ionospheric temporal variance at different targets in a large scene into consideration. The letter analyzes the time-varying ionospheric effects on GEO SAR imaging. Finally, the USTEC data is used to analyze the time-varying effects at whole orbit of GEO SAR, and explore whether the effects are consistent at different targets in a large scene. Simulation results show GEO SAR azimuth imaging performance becomes deteriorated and defocused, and the effects are different at different positions in a large scene.
KW - Background ionosphere
KW - GEO SAR
KW - Temporal Variability
KW - large scene
KW - multiple targets
UR - https://www.scopus.com/pages/publications/85007415507
U2 - 10.1109/IGARSS.2016.7729302
DO - 10.1109/IGARSS.2016.7729302
M3 - 会议稿件
AN - SCOPUS:85007415507
T3 - International Geoscience and Remote Sensing Symposium (IGARSS)
SP - 1194
EP - 1197
BT - 2016 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2016 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 36th IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2016
Y2 - 10 July 2016 through 15 July 2016
ER -