article_snippet: They include Landsat 7 and 8, part of Nasa's long-serving series.
article_snippet: The Landsat series of satellites have, since 1972, been used to measure Earth’s continental and coastal landscapes at a scale where human impacts and natural changes can be monitored.
article_snippet: Shown is an illustration of Landsat 8, which launched on 11 February 2013 .
article_snippet: The Landsat series of satellites have, since 1972, been used to measure Earth’s continental and coastal landscapes at a scale where human impacts and natural changes can be monitored.
article_snippet: Recently launched satellites on the animation include the Soil Moisture Active-Passive (SMAP) mission, which measures the surface soil moisture on Earth, and was launched on 31 January 2015.
highlights_snippet: They include Landsat 7 and 8, part of Nasa's long-serving series .
  