跨越近40年,美国的陆地卫星项目不断为人们提供着地球表面的数据信息,包括详细的植被分布、土地使用、森林分布及健康情况、地表水资源、人口分布等数据信息,以及它们的形态如何随着时间而变化的情况等。由美国国家航空航天局(NASA)和美国地质调查局管理,陆地卫星项目中的一系列人造卫星依靠被动式遥感,或使用传感器来阅读从地球表面反射或发出的能量。经过传感器处理和分析的数据可用于创建信 Over the past 40 years, the US land-satellite program has continuously provided people with data on the surface of the earth, including detailed information on vegetation distribution, land use, forest distribution and health, surface water resources, population distribution, and their forms How to change over time and so on. Managed by NASA and the United States Geological Survey, a series of satellites in land-based satellite programs rely on passive sensing or use sensors to read the energy reflected or emitted from the Earth’s surface. The data processed and analyzed by the sensor can be used to create a letter