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美国于1982年发射的Landsat-4及1984年提前发射的Landsat-5,除MSS以外,增添了新的传感器TM(Thematic Mapper,专题制图仪),它所涉及的工作波段包括可见光—近红外—中红外,共七个波段。它们的分辨率也由MSS的79×57米提高到了30×30米(其中仅第六波段为120米)。由于TM影像具有比MSS更高的空间分辨率及光谱分辨率,因此,对遥感技术的应用和遥感科学的发展产生了深刻的影响,并使陆地卫星图像的应用开始从试验阶段走向实用阶段。
Landsat-4 launched by the United States in 1982 and Landsat-5 launched in 1984 in addition to MSS have added a new Thematic Mapper (TM), which covers the working bands of visible-near-infrared- In the infrared, a total of seven bands. Their resolution also increased from MSS 79 × 57 meters to 30 × 30 meters (of which only the sixth band is 120 meters). Because TM images have higher spatial resolution and spectral resolution than MSS, TM images have a profound impact on the application of remote sensing technology and the development of remote sensing science, and the application of terrestrial satellite imagery has begun to move from the experimental stage to the practical stage.