CAJ | 학술논문

合成孔径雷达高度计可以获得比传统雷达高度计更高的测量精度，延迟校正是其中的核心技术。在雷达收发脉冲的间隔内，由于卫星运动，目标与雷达之间的距离变化会带来残余误差，这点在现有的延迟校正算法中都未考虑。该文研究了垂直速度和水平速度对延迟校正的影响，建立了合成孔径雷达高度计的延迟校正模型，提出了一个新的延迟校正算法，消除了卫星垂直速度和水平速度带来的残余误差。最后通过计算机仿真进行了验证，仿真结果表明，该文提出的算法可得到准确的校正结果。
합성공경뢰체고도계가이획득비전통뢰체고도계경고적측량정도，연지교정시기중적핵심기술。재뢰체수발맥충적간격내，유우위성운동，목표여뢰체지간적거리변화회대래잔여오차，저점재현유적연지교정산법중도미고필。해문연구료수직속도화수평속도대연지교정적영향，건립료합성공경뢰체고도계적연지교정모형，제출료일개신적연지교정산법，소제료위성수직속도화수평속도대래적잔여오차。최후통과계산궤방진진행료험증，방진결과표명，해문제출적산법가득도준학적교정결과。
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.