spot1-spot5的数据可以免费下载了
In order to perpetuate and enhance these data, the SPOT World Heritage (SWH) program runned by CNES make available for free to the public the SPOT 1, 2, 3, 4 and 5 archive. These are images (60x60 km) acquired from 1986 until 2015 in L1A level (radiometric egalization, no geometric correction).
下载链接为：https://regards.cnes.fr/user/swh/modules/60