| 星载SAR多普勒频率计算与全零多普勒中心导引 |
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| 引用本文： | 袁孝康. 星载SAR多普勒频率计算与全零多普勒中心导引[J]. 上海航天, 2010, 27(1): 1-8 |
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| 作者姓名： | 袁孝康 |
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| 作者单位： | 上海卫星工程研究所,上海,200240 |
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| 摘 要： | 讨论了在天线坐标系中多普勒频率的计算方法和全零多普勒中心的条件及其实现。证明对近圆轨道SAR卫星,采用与时间延迟积分-电荷耦合器件(TDI-CCD)空间相机相同的计算公式和偏流角补偿技术,能以偏航控制方式实现星载SAR的全零多普勒中心导引。由此可将回波多普勒中心频率的全球变化范围减至最小,显著降低了SAR成像处理的难度。研究具重要的应用价值。
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| 关 键 词： | 合成孔径雷达 星载合摩孔径雷达 回波多普勒频率计算 全零多普勒中心导引 偏航导引 |
Calculation of Doppler Frequency and Total Zero Doppler Centroid Steering for Space-Borne SAR |
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| YUAN Xiao-kang. Calculation of Doppler Frequency and Total Zero Doppler Centroid Steering for Space-Borne SAR[J]. Aerospace Shanghai, 2010, 27(1): 1-8 |
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| Authors: | YUAN Xiao-kang |
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| Affiliation: | YUAN Xiao-kang(Shanghai Institute of Satellite Engineering,Shanghai 200240,China) |
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| Abstract: | The formula for calculating echo Doppler frequency of space-borne synthetic aperture radar(SAR) was derived in the antenna coordinate system using the multiply coordinate translations in common and rigorous fashion in this paper.In the formula,the radar wavelength,the target position(the longitude and latitude),the satellite orbit and the attitude parameters were fully considered.The condition and realization obtaining the total zero Doppler centoid were also deeply discussed.It was demonstrated that the to... |
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| Keywords: | Synthetic aperture radar Space-borne SAR Echo Doppler frequency Total zero Doppler centroid steeing Satellite yaw steering |
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