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Celebrating 25 Years of Terra

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Celebrating 25 Years of Terra

Expanded coverage of topics from “The Editor’s Corner” in The Earth Observer

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Nasa personnel gather to celebrate Terra’s 25th anniversary at the Goddard Visitor Center.
Image credit: NASA

On December 18, 2024, Terra—the first EOS Flagship mission celebrated the 25th anniversary of its launch from Vandenberg Space Force (then Air Force) Base. Some 70 individuals gathered at the Goddard Space Flight Center’s (GSFC) Visitor Center to celebrate this remarkable achievement for the venerable mission – with 75 more participating virtually. 

The gathering began with a reception culminating with some informal remarks in the main area of the Visitor’s Center outside the auditorium from Marc Dinardo [Lockheed Martin, emeritus] who was involved in the design of Terra. He explained that – at the time it was being built in the 1990s – Terra represented a “big step forward” for Lockheed Martin compared to projects the company had done prior to this. He discussed several engineering feats, e.g., fitting spacecraft components into the Atlas rocket used to launch Terra, moving from tape recorders to solid state recorders for data storage, the (at the time) novel thermal system developed to reject heat and protect instruments, and the direct broadcast capabilities.

After the initial remarks, the in-person participants moved into the auditorium where they heard from representatives from Senior management [both from NASA Headquarters and GSFC] as well as from several key figures in Terra’s long history. Each speaker gave brief remarks and shared their perspectives on Terra’s development and achievements. Short summaries of each presentation follow below.

Julie Robinson [NASA HQ—Deputy Director of the Earth Science Division] began by noting that this feels like a family celebration.  She said her first  personal experience with Terra was submitting a proposal as a young scientist to do research that would use data from Terra. At that time the idea of studying Earth as a system of systems was brand new.  She had no idea at that time that more than a quarter-century later, she’d be involved  in planning the “next generation” Earth System Observatory (ESO). 

Shawn Domagal-Goldman [Deputy Director of the Sciences and Exploration Directorate] spoke about how some of the biggest science questions we try to answer are interdisciplinary and cross-instrument, spanning missions and generations, and that the expertise and diverse skillsets of those who have worked on the Terra team over the past 25 years embodies this goal.

Tom Neumann [GSFC—Deputy Director of Earth Science Division (GSFC)] reflected on his early involvement in the Terra–Aqua–Aura proposal reviews. He noted the sheer number of people involved in the mission and the logistical challenges that organizing that size group presented at the time.  He also commented on the feeling of family surrounding the Team and how this surely contributed to its remarkable achievements over the past 25 years.

Guennadi Kroupnik [Canadian Space Agency—Director General of Space Utilization] extended congratulations to NASA and Terra team for 25 years of operations. He commented that this “six year” mission has endured far beyond what was planned. Canada’s contribution was the Measurement of Pollution in the Troposphere (MOPITT) instrument with Jim Drummond [University of Toronto] as Principal Investigator. Kroupnik noted that MOPITT Is longest continuously running instrument in Canadian history. He is pleased that CSA has been able to partner with NASA on Terra and looks forward to future collaboration on the Atmospheric Observing System (AOS), which is one of the missions planned as part of ESO.

Jack Kaye [NASA Headquarters—Associate Director for Research of the Earth Science Division] spoke of Terra’s remarkable scientific accomplishments, the creativity of the team, and the intentional emphasis placed on validating the data, and the creativity of the Team. He also noted that the direct broadcast capability was extremely useful and led to many applications. Kaye remarked that the late Yoram Kauffman referred to the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) as the “zoom lens of Terra.”

Miguel Román [GSFC—Deputy Director for Atmospheres] described himself as a “child of Terra,” as he began his science career at around the same time that Terra launched and has been involved in various capacities ever since. Román recalled the launch taking place near vineyards, where the team celebrated the successful launch with local wine, to finally sharing a bottle of wine with the late Piers Sellers (who served as the first Terra project scientist) at one of the final gatherings Piers threw before he passed from cancer. Román also mentioned the Our Changing Planet book that four Earth Scientists – including former EOS Senior Project Scientist and Moderate Resolution Imaging Spectroradiometer (MODIS) Science Team Leader Michael King and former Aqua Project Scientist Claire Parkinson—both GSFC emeritus – collaborated to write that was published in 2007. This book made use of numerous images and data from Terra’s five instruments – as well as other EOS data.

Kurt Thome [GSFC—Terra Project Scientist] rounded out the presentations, emphasizing again what several have stated in their individual comments – the Terra Team truly is a family. He commented that he’s only been leading the mission for the past ten years and that his work builds on the shoulders of those who came before him. In particular, he acknowledged the slide Miguel Román showed briefly during his presentation that honored those who were part of the Terra family who have passed away – e.g., Piers Sellers, Yoram Kauffman. 

Steve Platnick
EOS Senior Project Scientist

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Mar 20, 2025

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