It's working! The covers on the Clouds and the Earth's Radiant Energy System Flight Model 6 (CERES FM6) opened Jan. 5, allowing it to scan Earth for the first time.

The instrument was one of five that launched Nov. 18, 2017, on the National Oceanic and Atmospheric Adminstration's (NOAA) Joint Polar Satellite System 1 (JPSS-1). After reaching polar orbit Nov. 18, the satellite became known as NOAA-20.

Cover-opening activities began around 8:30 p.m. ET Jan. 4 and were completed at approximately 1:45 a.m. Jan. 5. CERES FM6 began scanning Earth at approximately 1:25 p.m. Jan. 5. On Jan. 10, scientists used those scans to produce the "first light" images.

Built by Northrop Grumman, funded by NOAA and managed by NASA's Langley Research Center in Hampton, Virginia, in coordination with the JPSS program, CERES FM6 is the last in a series of instruments going back to the late 1990s that measure the solar energy reflected by Earth, the heat the planet emits, and the role of clouds in that process.

"CERES FM6 is the seventh and final copy since we first launched the first CERES instrument in 1997. It is the most accurate broadband radiometer that NASA/NOAA have flown as a result of a more rigorous prelaunch calibration campaign than previous instruments," said CERES Project Scientist Kory Priestley.

"We were able to take knowledge from on-orbit operations and apply it to this flight model. We've done a better job of building and characterizing the instrument, and with hope that will bear fruit as the mission is flown.

"The robustness of the CERES instruments already on-orbit, having exceeded their design lifetimes by a factor of two to three, is testament to the work of the dedicated team of engineers at Northrop Grumman," Priestley said.

"The scientific discoveries the community will make by utilizing these datasets will benefit humanity for decades to come."

Five other CERES instruments are flying on three other satellites. Their data helps scientists validate models that calculate the effect of clouds on planetary heating and cooling. The same data can also be helpful for improving near-term, seasonal forecasts influenced by weather events such as El Nino and La Nina. El Nino and La Nina are climatic fluctuations in the temperature of the tropical Pacific Ocean that can influence weather globally.

"The successful launch of CERES FM6 and acquisition of initial data is fantastic news," said David Considine, program manager for NASA's Modeling, Analysis and Prediction program.

"Its data will help us to understand the critical role that clouds play in the Earth system, and shows the value to the Nation of the NASA and NOAA collaboration leading to this achievement."

The CERES data record extends back to 1997. Prior to CERES, the Earth Radiation Budget Experiment (ERBE) collected similar data beginning in 1984. The two NASA programs demonstrate NASA's long-term involvement in measuring Earth's energy balance going back more than 30 years.

"Northrop Grumman is proud to be a collaborative partner with NASA and NOAA on this successful CERES mission. Between the seven CERES instruments and their ERBE predecessors, we have had a relationship in Earth radiation budget measurements that now spans over three decades," said Northrop Grumman CERES Program Manager Sean Kelly.

"The CERES instruments continue to reliably provide the climate data record necessary for monitoring, processing and analyzing critical data for the Earth science community. CERES is one of the most highly calibrated, highly reliable instruments on-orbit today."

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