Deputy Systems Engineer Phil Luers explains how the ATLAS transmitter and receiver subsystems come together to calculate the timing of photons, which, in turn, measure the elevation of ice.
Complete transcript available.
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Opto-Mechanical Engineer Tyler Evans explains how the photons that bounce back from Earth are received and filtered by the ATLAS telescope.
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Opto-Mechanical Engineer Tyler Evans illustrates how the laser is transmitted from the ATLAS instrument on the ICESat-2 spacecraft.
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The upper left frame is the entire photon cloud standardized on a global scale. The upper right frame shows selected photon cloud granules that sync with the global scale within a degree in order to show more spatial detail. In many cases, the zoomed-in photon clouds in this frame have been slowed down in order to show details clearly. The bottom right frame shows video examples of the terrain that correspond with where the orbit is. The bottom left terrain is the continuous orbit on a blue marble with labels for countries and other geographic features that represent where the orbit went over or very nearby. || ", "release_date": "2020-10-16T00:00:00-04:00", "update_date": "2023-05-03T13:44:36.810015-04:00", "main_image": { "id": 381904, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a013700/a013735/Phull-thumb_print.jpg", "filename": "Phull-thumb_print.jpg", "media_type": "Image", "alt_text": "Music: \"Sun Age,\" \"Data Visions,\" \"Water Memory,\" Universal Production Music.Complete transcript available.", "width": 1024, "height": 569, "pixels": 582656 } }, { "id": 13062, "url": "https://svs.gsfc.nasa.gov/13062/", "page_type": "Produced Video", "title": "ICESat-2 Por Los Números (en Español)", "description": "ICESat-2 es un láser espacial de gran precisión que integra la tecnología más puntera de la NASA. Para poder medir la altura del hielo del planeta, los ingenieros deben llevar el instrumento ATLAS de ICESat-2 al extremo: a veces yendo a lo grande, otras a lo pequeño, pero siempre manteniéndolo preciso.ICESat-2 is an incredibly precise space laser that features the latest in NASA technology. To measure ice heights, engineers have to take ICESat-2’s instrument ATLAS to the extreme – sometimes going big, sometimes going small, but always keeping it precise.Click here for English-language versions. || ", "release_date": "2018-09-10T10:00:00-04:00", "update_date": "2023-05-03T13:46:28.020054-04:00", "main_image": { "id": 409779, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a013000/a013062/12768_300Trillion_YOUTUBE_noaudio-firstframe.png", "filename": "12768_300Trillion_YOUTUBE_noaudio-firstframe.png", "media_type": "Image", "alt_text": "300 trillones.Música: \"Cristal Delight,\" Fred Dubois, Killer TracksTranscripción completa disponible.Watch this video on the NASA Goddard YouTube channel.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 12768, "url": "https://svs.gsfc.nasa.gov/12768/", "page_type": "Produced Video", "title": "ICESat-2 By the Numbers", "description": "ICESat-2 is an incredibly precise space laser that features the latest in NASA technology To measure ice heights, engineers have to take ICESat-2’s instrument ATLAS to the extreme – sometimes going big, sometimes going small, but always keeping it precise. || ", "release_date": "2017-11-03T00:00:00-04:00", "update_date": "2025-01-06T01:32:30.995998-05:00", "main_image": { "id": 409659, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a012700/a012768/12768_300Trillion_YOUTUBE_noaudio-firstframe.png", "filename": "12768_300Trillion_YOUTUBE_noaudio-firstframe.png", "media_type": "Image", "alt_text": "Music: \"Cristal Delight,\" Fred Dubois, Killer TracksComplete transcript available.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 12525, "url": "https://svs.gsfc.nasa.gov/12525/", "page_type": "Produced Video", "title": "Photon Jump", "description": "Pho, a plucky bright green photon of light, must travel from a NASA spacecraft down to Earth and back again to help complete a crucial science mission in this educational short film. The animation was created and produced by media art students from the Savannah College of Art in Design (SCAD) in Georgia, in collaboration with NASA’s Ice, Cloud and Land Elevation Satellite-2 (ICESat-2) mission. Their goal was to communicate the science and engineering of the mission, slated for launch in 2018. ICESat-2, managed by NASA Goddard in Greenbelt, Maryland, will measure the height of a changing Earth, one laser pulse at a time, 10,000 laser pulses a second. ICESat-2 will carry a photon-counting laser altimeter that will allow scientists to measure the elevation of ice sheets, glaciers, sea ice and more - all in unprecedented detail. The workings of this laser helped inspire students to create the character of Pho and plot his adventure. Our planet's frozen and icy areas, called the cryosphere, are a key focus of NASA's Earth science research. ICESat-2 will help scientists investigate why, and how much, our cryosphere is changing in a warming climate. The satellite will also measure heights across Earth's temperate and tropical regions, and take stock of the vegetation in forests worldwide. 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