第三章以PHI为代表介绍了线阵推扫式成像光谱仪的结构和工作原理，然后对PHI图像的几何校正方法进行描述。
Third chapter: introducing the structure and work principle of push-broom scan imager with PHI; introducing the method of PHI image's geometric correction.
第三章以PHI为代表介绍了线阵推扫式成像光谱仪的结构和工作原理，然后对PHI图像的几何校正方法进行描述。
Third chapter: introducing the structure and work principle of push-broom scan imager with PHI; introducing the method of PHI image's geometric correction.
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