"Landsat." YourDictionary, n.d. Web. 07 December 2018. <https://www.yourdictionary.com/Landsat>.
Landsat. (n.d.). Retrieved December 07th, 2018, from https://www.yourdictionary.com/Landsat
Any of various satellites used to gather data for images of the Earth's land surface and coastal regions. These satellites are equipped with sensors that respond to Earth-reflected sunlight and infrared radiation. The first Landsat satellite was launched in 1972. Currently, the seventh satellite (Landsat 7) is orbiting Earth.