基于慣導(dǎo)系統(tǒng)的機(jī)載SAR運(yùn)動(dòng)補(bǔ)償精度分析
Error analysis of airborne SAR motion compensation using INS
-
摘要: 該文分析了典型飛機(jī)慣性導(dǎo)航系統(tǒng)(INS)的誤差特性及其對(duì)機(jī)載合成孔徑雷達(dá)(SAR)運(yùn)動(dòng)補(bǔ)償精度和高分辨率成像的影響。分析結(jié)果表明INS定位漂移誤差是低頻誤差,并隨時(shí)間呈級(jí)數(shù)增加。初始階段INS漂移誤差較小,與雜波鎖定和自聚焦方法相結(jié)合,可以實(shí)現(xiàn)機(jī)載SAR高分辨率成像。Abstract: The motion compensation errors of the airborne Synthetic Aperture Radar (SAR,) using the typical aircraft Inertial Navigation System (INS) are analyzed. It is conduded that the navigation errors of INS are of low frequency and divergent. The INS errors cari be kept in a relativelv small.range at.the beginning stage. Therefore, the high resolution SAR, imaging can be achieved by combining INS with clutterlock and autofocus mothods.
-
S. Buckreuss.[J].Motion compensation for airborne SAR based on inertial data, RDM and GPS.Proc. on IGARSS94, USA.1994,:-[2]李立偉,高分辨率機(jī)載合成孔徑雷達(dá)中運(yùn)動(dòng)補(bǔ)償問題的研究,[博士論文],北京,北京航空航天大學(xué),1998年10月[3]J. Moreira, A new method of aircraft motion error extraction from radar raw data for real time motion compensation, IEEE Trans. on Geoscience and Remote Sensing, 1990, GRS-26(4), 620626.[4]T. M. Callway, et al., Subaperture autofocus for synthetic aperture radar, IEEE Trans. on Aerospace and Electronic Systems, 1994, AES-30(2), 617-621.[5]D.E. Wahl, et al., Phase gradient autofocus-A robust tool for high resolution SAR phase orrection, IEEE Trans. on Aerospace and Electronic Systems, 1994, AES-30(3), 827-835.[6]以光衢,陀螺理論與應(yīng)用,北京,北京航空航天大學(xué)出版社,1990年11月,第8章.[7]于波,陳云相,郭秀中,慣性技術(shù),北京,北京航空航天大學(xué)出版社,1994年8月,第2,3,5章. -
計(jì)量
- 文章訪問數(shù): 2283
- HTML全文瀏覽量: 130
- PDF下載量: 978
- 被引次數(shù): 0
下載:
