By using ERS-1/2 data, spectrum-shift filtering scheme in both range and azimuth directions is implemented.
针对ERS-1/2数据， 设计并实现了距离和方位向上的谱移滤波；
The new version of J77 is found to be obviously advantageous to the precision orbit determination of ERS-1, which is at the height of 800km, compared with other atmospheric models.
并将其应用于高度为800 公里ERS-1 卫星的轨道计算，结果表明：修订后的J77模型比其它大气模型在测轨精度上有明显改善。
Based on computer simulation, certain terrain is set and the effect of noise reduction of new method is verified. ERS-1/2 real data are also used to verify the validity of the new algorithm.
基于计算机仿真，设置地面场景验证了新算法的降噪效果，同时以ERS-1/2真实数据验证了新算法的有效性。
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