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Landsat 9: The Pieces Come Together

Landsat 9’s two science instruments are now attached to the spacecraft, bringing the mission one step closer to launch. In late December, the Operational Land Imager 2 (OLI-2) and the Thermal Infrared Sensor 2 (TIRS-2) were both mechanically integrated on to the spacecraft bus at Northrop Grumman in Gilbert, Arizona.

The Landsat 9 satellite stands in a cleanroom, with foil covering part of the top. The solar panel extends out one side, covered in clear plastic. Engineers in white cleanroom suits with masks and hoods stand and crouch on blue mechanical lifts, inspecting the satellite.
Engineers work on the newly integrated Landsat 9 satellite in a cleanroom at the Northrop Grumman facility in Gilbert, Arizona. In December, the team attached Landsat 9’s two instruments: OLI-2 (left) and TIRS-2 (right) to the spacecraft bus at the bottom of the image. The two instruments are covered to protect them from contaminants.
Credits: Northrop Grumman

The Landsat 9 mission continues the nearly 50-year Landsat data record, providing actionable information to resource managers and policymakers around the world. Landsat 9 will record the condition of Earth’s ever-changing land surface, enabling scientists and others to monitor crops and algal blooms, to assess deforestation trends and urban growth, and to aid disaster management.

One of Landsat 9's instruments is lowered by straps toward the spacecraft body. The spacecraft is in a white clean room. Engineers in white cleanroom suits with hoods and masks are standing around the spacecraft body, as well as on blue mechanical lifts, helping lower the instrument.
In December, engineers attached the two Landsat 9 instruments – OLI-2 and TIRS-2 – to the spacecraft.
Credits: Northrop Grumman

Landsat is a collaboration between NASA and the U.S. Geological Survey. NASA oversees the design, build, and launch; USGS operates the satellites on orbit, and manages the expanding data archive.

Engineers will next work on the electrical integration of the instruments, which includes getting power to the instruments and incorporating the satellite’s data-handling hardware.

The OLI-2 instrument makes measurements of Earth’s reflectance in the visible, near infrared, and shortwave infrared; the TIRS-2 instrument extends measurements made by Landsat 9 into the thermal infrared, providing information about the surface temperature. Water managers across the American West, as well as arid regions across the globe, rely on the highly calibrated measurements made by Landsat 8’s Thermal Infrared Sensor to monitor irrigation and water usage and they are eager to have the record continued by Landsat 9’s TIRS-2.  Reflected light measurements by the OLI-2 instrument are in turn used to map global land cover, ecosystem health, water quality, glacier flow, and other critical Earth surface properties.

The Landsat 9 spacecraft sitting in a white clean room on a tan floor. The spacecraft is a silver cylinder with electrical components coming out all along the sides.
Credits: Northrop Grumman

For more information, visit:

Landsat 9 Instrument Ready for Spacecraft Assembly

New Landsat Infrared Instrument Ships from NASA

nasa.gov/landsat

https://www.usgs.gov/land-resources/nli/landsat/landsat-9

https://landsat.gsfc.nasa.gov/landsat-9/

By: Laura Rocchio
NASA’s Goddard Space Flight Center