“The growth of open satellite-image archives such as Landsat is leading to more sophisticated data products.”


“Sentinel-2a is essentially Europe’s version of the American Landsat mission.”


“The Landsat program doesn’t produce images like the ones of astronauts playing golf on the moon nor geologists scaling an erupting volcano, but it has created one of the most important scientific repositories of data ever made.”


“We use Landsat 8 to document glacier velocity patterns on a mountain-range-wide scale. Mapping glacier velocity is facilitated by Landsat’s high radiometric resolution and precise geolocation.”


“The power of Landsat is that you can travel through time and you can travel through space and tell these really rich stories to help the greater good.”


“It’s really by stepping back and looking at the Earth, observing these changes in their context from space, can we really understand what’s happening.”


“The first step of ecosystem accounting is to actually map the dynamics of ecosystems over time.”


“Without the free and open Landsat data policy, a lot of commercial applications wouldn’t be feasible and a lot of commercial companies—including GDA—would be very different than they are.”


“That’s the beauty of Landsat—it allows us to quantify these spatial patterns that are of high interest to water managers.”


“We knew that ice had been retreating from this region recently but now, thanks to a wealth of freely available satellite data, we know this has been occurring pervasively along the coastline for almost half a century.”


“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.”


“Assessing land cover change, especially the dynamics of smaller water bodies, requires spatial resolution and temporal frequency that are currently only available from the Landsat program. The continuation of the Landsat program will increase the data quantity available for analysis.”


“Landsat is widely considered to be a crucial national asset, comparable to the satellite-based GPS system and National Weather Service satellites. Ready access to Landsat images supplies a reliable common record of Earth conditions that fosters the mutual understanding of environmental challenges by citizens, researchers, and decision makers worldwide.”


“Landsat has really become the gold standard of remote sensing from space. It’s provided an invaluable, indelible record of the recent history of our planet.”


“When I arrived in Gombe 50-plus years ago, looking up at the stars, it never occurred to me that one day, we’d be relying on remote sensing—satellites circling the globe high above—to help unite communities of people and save Gombe’s chimpanzees. NASA—through its resources and data and funding—is helping us to apply the kinds of innovative solutions needed to address the complex problems people and chimpanzees face today.”


“Landsat 8 represents yet another substantial advance to continuing a 40 year land data record, essential to understanding the Earth’s biosphere, anthropogenic changes to land use and land cover, the terrestrial carbon cycle, and the consequences for climate and biodiversity. This important extension to the Landsat series, the Landsat 8 mission, was achieved, through an outstanding interagency and industrial partnership, effectively managed to achieve breakthrough improvements in satellite …


“Sterling service of over four decades of Earth Observations. No ifs, no buts, just a long-term mission to aid science & society.”


“By seeing in electromagnetic increments beyond the normal range of human vision, Landsat revealed whole new worlds hidden within the folds of a familiar world we thought we knew so well.”


“Thanks to Landsat, we were able to dramatically improve our satellite base map in Google Earth and Google Maps on two separate occasions, first in 2013, and again in June 2016. Our most recent 15 meter-per-pixel global mosaic was made from over 1.5 million Landsat 7 and Landsat 8 images and forms the view of Earth you see across our mapping products for the first twelve zoom levels of the imagery basemap.”


“Landsat provides a very good coverage of Amazonia both spatially and temporally. We have known for some time already that the Landsat images can be used to identify ecologically relevant environmental and biotic variation in Amazonian rainforests, but this is the first time we use satellite images to actually predict species distributions.”


“This project would not have been possible without the consistent, long-term coverage provided by Landsat. The > 30-year archive of Landsat TM, ETM+, and OLI imagery enabled us to track changes in mangrove range limits on decadal scales.”


“A sizable portion of our greenhouse gas contribution to the atmosphere comes from land use. And having Landsat data to look back to the 1970s, from there to now, you can then calculate or approximate year-by-year what that contribution is, and that’s extremely important.”


“Agricultural engineer Jean-Francois Pekel and colleagues have created a kind of virtual time machine, showing past changes in surface water and providing a baseline for charting the changing future of our watery world. To achieve this feat, Pekel and colleagues used more than 3 million Landsat images of Earth’s lakes, wetlands, and rivers taken between 1984 and 2015.”


“The tracking of over-irrigated areas for targeting irrigation advisory texts was completely dependent on Landsat TIR data.”


Landsat 9 bw
Landsat 9 bw
Landsat 9 bw

The NASA/USGS Landsat Program provides the longest continuous space-based record of Earth’s land in existence. Landsat data give us information essential for making informed decisions about Earth’s resources and environment.