TY - JOUR
T1 - Estimation of aircraft altitude based on squint mode SAR data
AU - Zeng, Tao
AU - Li, Yinghe
AU - Ding, Zegang
AU - Liu, Luosi
AU - Zou, Fei
PY - 2015/1
Y1 - 2015/1
N2 - The aircraft altitude relative to the illuminated region is a significant parameter for the geometric correction in squint mode synthetic aperture radar (SAR) imaging. Error in the parameter causes geometric distortion, which degrades the image quality. To circumvent this problem, a relative altitude estimator (RAE) is proposed based on the relationship between the relative aircraft altitude and the range variation of the Doppler centroid. The high performance of the RAE is investigated compared to the Cramér-Rao lower bound of the relative aircraft altitude. Finally, the effectiveness of the RAE in practical applications is verified by real data processing.
AB - The aircraft altitude relative to the illuminated region is a significant parameter for the geometric correction in squint mode synthetic aperture radar (SAR) imaging. Error in the parameter causes geometric distortion, which degrades the image quality. To circumvent this problem, a relative altitude estimator (RAE) is proposed based on the relationship between the relative aircraft altitude and the range variation of the Doppler centroid. The high performance of the RAE is investigated compared to the Cramér-Rao lower bound of the relative aircraft altitude. Finally, the effectiveness of the RAE in practical applications is verified by real data processing.
KW - Cramér-Rao lower bound (CRLB)
KW - doppler centroid variation
KW - geometric correction
KW - relative altitude estimator (RAE)
KW - squint mode SAR
KW - synthetic aperture radar (SAR)
UR - https://www.scopus.com/pages/publications/84906789256
U2 - 10.1109/LGRS.2014.2329292
DO - 10.1109/LGRS.2014.2329292
M3 - Article
AN - SCOPUS:84906789256
SN - 1545-598X
VL - 12
SP - 135
EP - 139
JO - IEEE Geoscience and Remote Sensing Letters
JF - IEEE Geoscience and Remote Sensing Letters
IS - 1
M1 - 6840954
ER -