Title :
Data-based onboard estimation of antenna phase center spacing in space-borne azimuth multi-channel SAR system
Author :
Yan-qing Zhu ; Jie Chen ; Hong-cheng Zeng ; Hao-jie Zhang ; Peng-bo Wang ; Ze Yu ; Peng Xiao
Author_Institution :
Sch. of Electron. & Inf. Eng., Beihang Univ., Beijing, China
Abstract :
In space-borne azimuth multi-channel SAR, the antenna phase center spacing should be measured precisely to obtain the reconstruction filters. In this paper, a data-based onboard estimation method of antenna phase center spacing in spaceborne multi-channel SAR system is proposed. Firstly, the principle of data-based onboard estimation is presented, then the estimation method in details is described step-by-step. Finally, simulations are carried out, with two influence factors, SCR and focusing accuracy, to demonstrate the validity of the proposed estimation method.
Keywords :
radar antennas; remote sensing by radar; synthetic aperture radar; antenna phase center spacing; data-based onboard estimation method; reconstruction filters; space-borne azimuth multichannel SAR system; synthetic aperture radar; Accuracy; Antenna measurements; Azimuth; Doppler effect; Estimation; Focusing; Thyristors; Data-based; antenna phase center spacing; multi-channel SAR; onboard estimation;
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2014 IEEE International
Conference_Location :
Quebec City, QC
DOI :
10.1109/IGARSS.2014.6946468
