On May 11, 2024, Terra stopped transmitting Direct Broadcast. Terra is experiencing a solar array power generation issue limiting our ability to continue all science and provide Direct Broadcast continuously. We are continuing to evaluate the spacecraft power generation issue. We will resume Direct Broadcast if power generation returns to normal, but may only be able to support limited Direct Broadcast, if any.
A recent programmatic change in the Terra mission is prompting the flight operation staffing to go from 24 hours a day, 7 days a week to 12 hours a day, 7 days a week, with limited operational response when staff are not on site. For more information, see below.
Terra: The EOS Flagship
Terra explores the connections between Earth’s atmosphere, land, snow and ice, ocean, and energy balance to understand Earth’s climate and climate change and to map the impact of human activity and natural disasters on communities and ecosystems
Examples of each instrument’s capabilities (clockwise): land composition (ASTER), reflected energy (CERES), aerosols (MISR), vegetation snow and ice (MODIS), carbon monoxide (MOPITT)
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Important Terra Updates and Information
Terra’s orbit has changed, but the data quality hasn’t! Visit this link to learn more about Terra’s new orbit.
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Click the links below to catch up on all the latest Terra news and updates!
- Terra Views the Eclipse! (April 8)
- Top 2023 Terra & Earth Observatory Stories
- Happy Valentine’s Day 2024
Past News Features
Terra’s Lower Orbit Virtual Community Forum
NASA’s Terra, Aqua, and Aura Drifting Orbits Workshop Information
Terra Begins Drifting. What’s Next?
After more than 20 years orbiting at 705 km above Earth’s surface and routinely crossing the equator at approximately the same time every day, Terra is now drifting. With no maneuvers planned to sustain Terra’s altitude and crossing time, Terra will slowly get closer and closer to Earth – crossing the equator earlier and earlier as time passes. However, despite impacts to some of Terra’s nearly 100 data products, Terra’s five sensors continue to collect meaningful scientific data, producing one of the longest continuous climate data records collected by a satellite. Read more…
Terra: Providing Critical Data to Help Society
Twenty Years of Terra in Our Lives
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There is no question that technology has changed. But, at the same time that our lives on Earth were being shaped by our access to technology, 705 kilometers above us, a satellite was changing how we understood our planet.
For 20 years, Terra, the flagship Earth observing satellite,has chronicled changes on Earth. Designed and built in the 1980s and 90s, NASA and Lockheed Martin engineers set out to build a satellite that could take simultaneous measurements of Earth’s atmosphere, land, and water. Its mission – to understand how Earth is changing and to identify the consequences for life on Earth. Season after season, Terra data continues to helpus understand how the evolving systems of our planet affect our lives – and howwe can use that data to benefit society. Read more and find resources from our anniversary events, Terra 20 Events
Update on Terra’s New Orbit: Since 2020, Terra has been drifting to an earlier equator crossing time, and in October 2022 was lowered by ~5km in altitude. These changes in orbit did not reduce the data quality of Terra products, and only created minor changes to orbital repeat time and swath width (for some instruments). See Terra’s New Orbit for more information.
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