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The Landsat program does more than just collect data. It helps write Earth's story.

NASA’s Landsat 9 satellite launches on a United Launch Alliance Atlas V 401 rocket from Space Launch Complex 3 at Vandenberg Space Force Station in California on Sept. 27, 2021. Launch time was 2:11 p.m. EDT (11:11 a.m. PDT). The launch is managed by NASA’s Launch Services Program, based at the agency’s Kennedy Space Center in Florida. Landsat 9 will join its sister satellite, Landsat 8, in orbit in collecting images from across the planet every eight days. This calibrated data will continue the Landsat program’s critical role in monitoring the health of Earth and helping people manage essential resources, including crops, irrigation water, and forests. NASA Goddard manages the Landsat 9 mission. Goddard teams also built and tested one of the two instruments on Landsat 9, the Thermal Infrared Sensor 2 (TIRS-2) instrument. TIRS-2 will use thermal imaging to make measurements that can be used to estimate soil moisture and detect the health of plants.

Since 1972, Landsat satellites have systematically documented our planet's changing surface, from shifting agricultural patterns and urban expansion to forest loss and coastal erosion. This continuous record provides scientists with invaluable data to understand long-term environmental change. 

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