一種消除合成孔徑雷達(dá)高度計延遲校正中殘余誤差的新算法及仿真驗證

王磊; 許可; 史靈衛(wèi); 楊雙寶

doi:10.11999/JEIT150282

一種消除合成孔徑雷達(dá)高度計延遲校正中殘余誤差的新算法及仿真驗證

doi: 10.11999/JEIT150282 cstr: 32379.14.JEIT150282

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出版歷程
- 收稿日期: 2015-03-09
- 修回日期: 2015-06-29
- 刊出日期: 2015-11-19

A New Range Migration Correction Algorithm and Its Simulation for SAR Altimeter

摘要

摘要: 合成孔徑雷達(dá)高度計可以獲得比傳統(tǒng)雷達(dá)高度計更高的測量精度，延遲校正是其中的核心技術(shù)。在雷達(dá)收發(fā)脈沖的間隔內(nèi)，由于衛(wèi)星運動，目標(biāo)與雷達(dá)之間的距離變化會帶來殘余誤差，這點在現(xiàn)有的延遲校正算法中都未考慮。該文研究了垂直速度和水平速度對延遲校正的影響，建立了合成孔徑雷達(dá)高度計的延遲校正模型，提出了一個新的延遲校正算法，消除了衛(wèi)星垂直速度和水平速度帶來的殘余誤差。最后通過計算機(jī)仿真進(jìn)行了驗證，仿真結(jié)果表明，該文提出的算法可得到準(zhǔn)確的校正結(jié)果。
- 合成孔徑雷達(dá)高度計 /
- 延遲校正算法 /
- 殘余誤差
Abstract: The Range Migration Correction (RMC) is a key technique of synthetic aperture radar altimeter which is more precise than the conventional radar altimeter. Because of the satellite motion, the distance change between the satellite and the observed target will bring about some residual errors, but they are ignored in the existing RMC algorithms. In this paper, the influences of the vertical and horizontal velocities of the satellite are studied, then an RMC model is builded, and finally a new RMC algorithm which corrects not only the slant range error but also the residual errors is proposed. The simulation results show that this new algorithm can obtain more accurate outcomes.
- SAR altimeter /
- Range migration algorithm /
- Residual error

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參考文獻(xiàn)(21)

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