The US space agency National Aeronautics and Space Administration (NASA) has successfully launched Landsat 9, a powerful satellite built to monitor the Earth's land surface.
It was launched at 2:12 pm EDT on Monday from Vandenberg Space Force Base in California. Landsat 9, a joint NASA and US Geological Survey (USGS) mission, lifted off on a United Launch Alliance Atlas V rocket from Vandenberg's Space Launch Complex 3E.
Norway's Svalbard satellite-monitoring ground station acquired signals from the spacecraft about 83 minutes after launch. Landsat 9 is performing as expected and will eventually settle into the final orbit that takes it over the planet's poles, at an altitude of about 438 miles (705 kilometers).
"NASA uses the unique assets of our own unprecedented fleet, as well as the instruments of other nations, to study our own planet and its climate systems," said NASA Administrator Bill Nelson.
"With a 50-year data bank to build on, Landsat 9 will take this historic and invaluable global program to the next level. We look forward to working with our partners at the US Geological Survey and the Department of the Interior again on Landsat Next, because we never stop advancing our work to understand our planet," added Nelson.
"Today's successful launch is a major milestone in the nearly 50-year joint partnership between USGS and NASA who, for decades, have partnered to collect valuable scientific information and use that data to shape policy with the utmost scientific integrity," said Secretary of the Interior Deb Haaland.
"As the impacts of the climate crisis intensify in the United States and across the globe, Landsat 9 will provide data and imagery to help make science-based decisions on key issues including water use, wildfire impacts, coral reef degradation, glacier and ice-shelf retreat, and tropical deforestation," added Haaland.
The first Landsat satellite launched in 1972. Since then, the US space agency has always kept a Landsat in orbit to collect images of the physical material covering our planet's surface and changes to land usage.
The images allow researchers to monitor phenomena including agricultural productivity, forest extent and health, water quality, coral reef habitat health, and glacier dynamics.
"The Landsat mission is like no other," said Karen St. Germain, director of the Earth Science Division at NASA Headquarters in Washington.
"For nearly 50 years, Landsat satellites observed our home planet, providing an unparalleled record of how its surface has changed over timescales from days to decades. Through this partnership with USGS, we've been able to provide continuous and timely data for users ranging from farmers to resource managers and scientists. This data can help us understand, predict, and plan for the future in a changing climate," added Germain.
Landsat 9 joined its sister satellite, Landsat 8, in orbit. Working in tandem, the two satellites will collect images spanning the entire planet every eight days.
"Landsat 9 will be our new eyes in the sky when it comes to observing our changing planet," said Thomas Zurbuchen, associate administrator for science at NASA.
"Working in tandem with the other Landsat satellites, as well as our European Space Agency partners who operate the Sentintel-2 satellites, we are getting a more comprehensive look at Earth than ever before. With these satellites working together in orbit, we'll have observations of any given place on our planet every two days. This is incredibly important for tracking things like crop growth and helping decision-makers monitor the overall health of Earth and its natural resources," added Zurbuchen.
The instruments aboard Landsat 9 - the Operational Land Imager 2 (OLI-2) and the Thermal Infrared Sensor 2 (TIRS-2) - measure 11 wavelengths of light reflected or radiated off Earth's surface, in the visible spectrum as well as other wavelengths beyond what our eyes can detect.
As the satellite orbits, these instruments will capture scenes across a swath of 115 miles (185 kilometers). Each pixel in these images represents an area about 98 feet (30 meters) across, about the size of a baseball infield. At that high resolution, resource managers will be able to identify most crop fields in the US.
"Launches are always exciting, and today was no exception," said Jeff Masek, NASA Landsat 9 project scientist.
"But the best part for me, as a scientist, will be when the satellite starts delivering the data that people are waiting for, adding to Landsat's legendary reputation in the data user community," added Masek.
The USGS Earth Resources Observation and Science (EROS) Center in Sioux Falls, South Dakota, processes and stores data from the instruments, continuously adding that information to the five decades of data from all of the Landsat satellites.
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