Quotes to Note


“By analyzing 34 years of [Landsat] data, we estimated that about 56% of the rivers globally are affected by seasonal ice [and] that there is 2.5 percentage points decline of river ice globally during this time.”

— Xiao Yang, paleoclimatologist, University of North Carolina at Chapel Hill, River Ice Is Disappearing, Eos, Feb 25, 2020

"Even though I have a book coming out about the Moon Landing, I'll say it: Landsat is likely the greatest, most impactful, yet under-appreciated, accomplishment of the entire space age."

— Dr. Danny Bednar, Assistant Professor in the Department of Geography, Western University, {From the Twittersphere}, Jan 22, 2020

"The results of the Scopus bibliometric analysis indicate that inland water quality remote sensing has been growing dramatically since its introduction in the 1970s...The most pronounced year-on-year jump occurs right after 2008, which corresponds to the public release of freely available Landsat imagery by NASA and the US Geological Survey...This result is consistent with previous research showing that for multiple earth observation fields, the release of the Landsat archive resulted in more frequent and larger-scale studies."

“The opening of the Landsat archive in 2008 was pivotal... We now have the best available map of disturbances for the United States.”

— Sean Healey, an ecologist with the USFS Rocky Mountain Research Station, Spotting the Spotted Owl: 30 Years of Forest Disturbance, NASA Earth Observatory, Dec 23, 2019

"By combining the 34-year record provided by Landsat [30 m] with climate data, we can now quantify relations between water availability and vegetation dynamics in ways that were not previously possible."

— Dr. Christine Albano, ecohydrologist at the Desert Research Institute, When a River Runs Through Drylands, Dec 13, 2019

"The availability and accessibility of remotely sensed digital imagery obtained from Landsat satellites allow coastal scientist—and more importantly community members—the opportunity to map, evaluate and continuously monitor shoreline movement at regular intervals given the unprecedented pace of Arctic climate change."

— Dr. Ravi Darwin Sankar, geologist with the Arctic Institute of North America & the University of Calgary in Canada, Coastal Change in the Northwest Territories, Dec 12, 2019

"Landsat makes it possible to compare images over almost 5 decades and makes the role of climate change unmistakable in this incredibly beautiful mountainous part of Alaska."

— Dr. Christopher Shuman, glaciologist with NASA Goddard Space Flight Center and the University of Maryland at Baltimore County, Watching Glacier Bay National Park Change, Dec 11, 2019

"Landsat fit all our criteria, and best of all it was free and very easy to download and work with."

— Dr. Emily Fairfax, Assistant Professor in the department of Environmental Science and Resource Management at California State University Channel Islands, Smokey the Beaver? Beaver Dams and Wildfire, Dec 11, 2019

"There is no satellite record that has the temporal reach of Landsat. While new satellite- and aircraft-based sensors are coming online with sub-meter resolution offering more and more spectral bands, none of them allow the types of temporal investigation that the combined generations of Landsat offer."

— Dr. Zachary Brecheisen, post-doctoral research associate at Purdue University, Arid-Region Agriculture in Arequipa, Peru, Dec 10, 2019

“The long-term acquisition plan of the Landsat mission provides a unique and invaluable dataset for tracking multi-decadal changes in the density and distribution of mangroves at continental scales.”

— Dr. Leo Lymburner, Landsat Science Team Member, Mapping the Mighty Mangrove, Dec 4, 2019

“Landsat has been one of the only ways we can directly measure the global food supply.”

— Brad Doorn, program manager for NASA’s Applied Sciences Water Resources and Agriculture Research at NASA Headquarters in Washington, Satellites Track Status of Nation’s Food Supply, Nov 27, 2019

“During abnormal growing seasons or natural disasters, satellites shine. Landsat is a robust and independent way to validate what our statistics are telling us.”

— Rick Mueller, Head of USDA’s National Agricultural Statistics Service, or NASS Spatial Analysis Research Section and manager of the Cropland Data Layer Program in Washington., Satellites Track Status of Nation’s Food Supply, Nov 27, 2019