{ "count": 8, "next": null, "previous": null, "results": [ { "id": 12770, "url": "https://svs.gsfc.nasa.gov/12770/", "result_type": "Produced Video", "release_date": "2018-03-19T18:00:00-04:00", "title": "Harmonized Landsat 8 and Sentinel-2 Data", "description": "Landsat 8 and Sentinel-2 satellites have spectral and spatial similarities that make using their data together possible. When the data are used together observations can be more timely and accurate. The HLS project is an effort to \"harmonize\" the data of the two satellite programs so that they can be more easily used in unison. The ultimate goal is to obtain seamless 2-3 day global surface reflectance coverage at 30 meters that removes residual differences between the sensors due to spectral bandpass and view geometry. Currently the v1.3 HLS data set encompasses 82 global test sites that cover about 7% of the global land area.Using the processing power of the NASA Earth Exchange (NEX) computer cluster at NASA Ames, the HLS workflow atmospherically corrects data from the satellites, geographically tiles the Landsat data in a manor matching the Sentinel-2 tiling, and then corrects for different sensor view angles (Bidirectional Reflectance Distribution Function, or BRDF) and does a slight band pass adjustment for the Sentinel-2 data to create the harmonized 30-meter product.The HLS team includes researchers from NASA Goddard Space Flight Center, the University of Maryland, and NASA Ames Research Center. || ", "hits": 74 }, { "id": 12848, "url": "https://svs.gsfc.nasa.gov/12848/", "result_type": "Produced Video", "release_date": "2018-02-08T13:00:00-05:00", "title": "NASA Studies Snow At The Winter Olympics", "description": "This Winter Olympics, NASA will be studying how well researchers can measure snow from the ground and space and provide better data for snowstorm predictions. NASA will make these observations as one of 20 agencies from eleven countries in a project led by the Korean Meteorological Administration called the International Collaborative Experiments for PyeongChang 2018 Olympic and Paralympic Winter Games, or ICE-POP. NASA.gov feature: NASA Seeks the Gold in Winter Olympics Snow || ", "hits": 26 }, { "id": 4366, "url": "https://svs.gsfc.nasa.gov/4366/", "result_type": "Visualization", "release_date": "2015-10-16T16:00:00-04:00", "title": "The Chesapeake Bay in 661 Million Pixels", "description": "This gallery was created for Earth Science Week 2015 and beyond. It includes a quick start guide for educators and first-hand stories (blogs) for learners of all ages by NASA visualizers, scientists and educators. We hope that your understanding and use of NASA's visualizations will only increase as your appreciation grows for the beauty of the science they portray, and the communicative power they hold. Read all the blogs and find educational resources for all ages at: the Earth Science Week 2015 page.Imagine you're flying 438 miles above the Earth taking pictures and collecting information of everything below. What do you see? Now imagine you’ve been doing this non-stop for over 40 years. Do you notice any change? A satellite series named Landsat has been doing exactly that. As a NASA scientist, I've been using Landsat-8 (the current satellite) data for a long time. Yet it's still amazing to create images of salt reflecting a brilliant white in a natural color scene, or seeing it turn a beautiful cyan using an infrared perspective. With the right tools I can discern patterns in the salt or make visible the phytoplankton dancing on the blue ocean. I've observed cities grow, forests recover from fire, islands form, and more. Our world is constantly changing.When sunlight hits the Earth's surface, it is absorbed, reflected, or scattered, resulting in different wavelengths of light leaving the Earth. Landsat-8 measures the visible and infrared wavelengths in 30-meter pixels and in order to \"see\" the image, we assign particular colors to different wavelengths. || ", "hits": 19 }, { "id": 11919, "url": "https://svs.gsfc.nasa.gov/11919/", "result_type": "Produced Video", "release_date": "2015-10-06T11:00:00-04:00", "title": "The Changing Shape Of Farming", "description": "Satellite images taken over the last half-century tell the story of America's evolving agricultural landscape. || c-1920.jpg (1920x1080) [1.4 MB] || c-1280.jpg (1280x720) [863.3 KB] || c-1024.jpg (1024x576) [615.4 KB] || c-1024_print.jpg (1024x576) [642.1 KB] || c-1024_searchweb.png (320x180) [187.4 KB] || c-1024_web.png (320x180) [187.4 KB] || c-1024_thm.png (80x40) [38.6 KB] || ", "hits": 65 }, { "id": 11974, "url": "https://svs.gsfc.nasa.gov/11974/", "result_type": "Produced Video", "release_date": "2015-08-17T19:00:00-04:00", "title": "Mining for Water in Kansas", "description": "This image from 2015, and the accompanying images from 1972, 1988, and 2011 show the transformation of Kansas farmland from dryland, rectangular fields to circular irrigated fields from center-pivot irrigation systems. The mining of ground water for agriculture has been a significant trend globally over the last half-century, and these images of a region in Kansas highlight the trend within the United States. || Garden_city_KS-2015_print.jpg (1024x975) [580.9 KB] || Garden_city_KS-2015_searchweb.png (320x180) [147.7 KB] || Garden_city_KS-2015_thm.png (80x40) [9.3 KB] || Garden_city_KS-2015.tif (3920x3736) [41.9 MB] || ", "hits": 111 }, { "id": 10513, "url": "https://svs.gsfc.nasa.gov/10513/", "result_type": "Produced Video", "release_date": "2009-12-11T00:00:00-05:00", "title": "A Landsat Flyby", "description": "The Landsat program is the longest continuous global record of the Earth's surface, and continues to deliver both visually stunning and scientifically valuable images of our planet. This short video highlights Landsat's many benefits to society. || ", "hits": 14 }, { "id": 10401, "url": "https://svs.gsfc.nasa.gov/10401/", "result_type": "Produced Video", "release_date": "2009-03-01T00:00:00-05:00", "title": "Earth Observing Landsat 5 Turns 25 Years Old", "description": "Still observing the Earth after 25 years—22 beyond its three-year primary mission lifetime—Landsat 5 collects valuable scientific data daily. Some attribute the satellite's longevity to over-engineering. Others say it's a long run of good luck. Whatever the reason, no one who attended the satellite's March 1984 launch could have expected it would still be working today.For complete transcript, click here. || Landsat5_turns_25_ipodLG.00202_print.jpg (1024x576) [73.2 KB] || Landsat5_turns_25_ipodLG_web.png (320x180) [149.4 KB] || Landsat5_turns_25_ipodLG_thm.png (80x40) [13.9 KB] || Landsat5_turns_25_appletv.webmhd.webm (960x540) [51.8 MB] || Landsat5_turns_25_appletv.m4v (960x540) [87.6 MB] || Landsat5_turns_25_YouTube.mov (1280x720) [56.6 MB] || Landsat5_turns_25_fullresH264.mov (1280x720) [119.3 MB] || Landsat5_turns_25_ipodLG.m4v (640x360) [42.3 MB] || Landsat5_turns_25_svsSM.mpg (512x288) [32.8 MB] || Landsat5_turns_25_ipodSM.m4v (320x180) [16.4 MB] || Landsat5_turns_25_NASAcast.mp4 (320x236) [30.9 MB] || GSFC_20090227_Landsat5turns25.wmv (346x260) [30.5 MB] || ", "hits": 186 }, { "id": 10381, "url": "https://svs.gsfc.nasa.gov/10381/", "result_type": "Produced Video", "release_date": "2009-02-27T00:00:00-05:00", "title": "25 Years of Landsat 5: 1984 Las Vegas Urban Expansion", "description": "This mosaic of images shows the dramatic growth of the Las Vegas urban area during the 25 years that Landsat 5 has been collecting data. || Las_Vegas_1984_2009_1600_1200.jpg (1600x1200) [912.2 KB] || Las_Vegas_1984_2009_560_420.jpg (560x420) [341.7 KB] || Las_Vegas_1984_2009_1600_1200_web.png (320x240) [354.0 KB] || Las_Vegas_1984_2009_1600_1200_thm.png (80x40) [32.0 KB] || Las_Vegas_1984_2009_1600_1200_searchweb.png (320x180) [144.5 KB] || Las_Vegas_1984_2009_1600_1200.tif (1600x1200) [5.5 MB] || ", "hits": 34 } ] }