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            "description": "The ATLAS lidar on ICESat-2 uses 6 laser beams to measure the earth’s elevation and elevation change.  As a global mission, ICESat-2 will collect data over the entire globe, however the ATLAS instrument is optimized to measure land ice and sea ice elevation in the polar regions.  ICESat-2 reports elevations with respect to a reference surface, called an ellipsoid.  In this measurement system, shared by GPS devices, an elevation of zero meters indicates the notional sea level, although tides, wind, and waves can make the actual sea level either greater than or less than zero.  The Antarctic ice sheet, shown here, ranges up to 4000m above sea level.  Over the course of 91 days, ATLAS will generate 1387 ground tracks across Antarctica for each of it’s 6 beams.",
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    "related": [
        {
            "id": 4913,
            "url": "https://svs.gsfc.nasa.gov/4913/",
            "page_type": "Visualization",
            "title": "ICESat-2 Maps Subglacial Lakes in Antarctica",
            "description": "Data visualization featuring precise map of Mercer and Conway subglacial lakes in West Antarctica. The visualization sequence starts with a view of the Americas and slowly zooms into the suture between the Mercer and Whillans ice streams. Surface-height anomaly data from NASA's ICESat-2 mission provide critical insight for the drain-fill cycles of subglacial lakes and aid in the discovery of two new water bodies within the same region. This data-driven visualization includes labels of ice formations close to the area of interest and repeats playback of the segment of the subglacial lakes surface-height anomalies. || SubglacialLakesCompositex2_4K60fps_0904_print.jpg (1024x576) [88.8 KB] || SubglacialLakesCompositex2_4K60fps_0904.png (3840x2160) [5.9 MB] || Compositex2 (1920x1080) [0 Item(s)] || SubglacialLakesCompositex2_HD60fps.mp4 (1920x1080) [58.4 MB] || SubglacialLakesCompositex2_1080p30.mp4 (1920x1080) [53.8 MB] || SubglacialLakesCompositex2_HD60fps.webm (1920x1080) [6.9 MB] || Compositex2_4K (3840x2160) [0 Item(s)] || SubglacialLakesCompositex2_4K60fps.mp4 (3840x2160) [58.5 MB] || SubglacialLakesCompositex2_4K30fps.mp4 (3840x2160) [182.4 MB] || SubglacialLakesCompositex2_1080p30.mp4.hwshow [200 bytes] || ",
            "release_date": "2021-07-29T19:00:00-04:00",
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                "media_type": "Image",
                "alt_text": "Data visualization sequence of surface-height anomaly data from NASA's ICESat-2 mission for Conway and Mercer subglacial lakes. This sequence includes colorbar, timestamp, scale bar and lake outlines.",
                "width": 1024,
                "height": 576,
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        },
        {
            "id": 13045,
            "url": "https://svs.gsfc.nasa.gov/13045/",
            "page_type": "Produced Video",
            "title": "ICESat-2 Launch Live Interviews",
            "description": "B-roll will be added on Thursday, Sept 6th || icesat_screen_grab.png (1324x724) [1.3 MB] || icesat_screen_grab_print.jpg (1024x559) [92.1 KB] || icesat_screen_grab_searchweb.png (320x180) [77.6 KB] || icesat_screen_grab_thm.png (80x40) [5.3 KB] || ICESat-2_B-roll_Liveshots.webm (960x540) [211.4 MB] || ICESat-2_B-roll_Liveshots_facebook_720.mp4 (1280x720) [809.8 MB] || ICESat-2_B-roll_Liveshots.mov (1280x720) [6.5 GB] || ",
            "release_date": "2018-09-04T16:00:00-04:00",
            "update_date": "2023-05-03T13:46:28.489690-04:00",
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                "media_type": "Image",
                "alt_text": "B-roll will be added on Thursday, Sept 6th",
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    "products": [
        {
            "id": 14261,
            "url": "https://svs.gsfc.nasa.gov/14261/",
            "page_type": "Produced Video",
            "title": "Leaders in Lidar",
            "description": "In this series, we dive into the legacy of Goddard's lead role in developing laser altimetry, which has revolutionized the way we map our planet, the Moon and other planets. Each chapter looks at the successes and failures of these lidar instruments, beginning with the Mars Observer Laser Altimeter in the late 1980s, through the current generation of laser altimeters on ICESat-2 and GEDI. Through dozens of interviews and archival footage, the history, challenges and legacy of lidar are uncovered. || ",
            "release_date": "2023-01-19T16:00:00-05:00",
            "update_date": "2023-05-03T11:43:45.152126-04:00",
            "main_image": {
                "id": 552002,
                "url": "https://svs.gsfc.nasa.gov/vis/a010000/a014200/a014261/seriestease_thumb_print.jpg",
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                "media_type": "Image",
                "alt_text": "Series teaser for vertical Instagram Reels.Music: \"The Archives,\" Universal Production Music.Complete transcript available.",
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                "height": 1806,
                "pixels": 1849344
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        },
        {
            "id": 12977,
            "url": "https://svs.gsfc.nasa.gov/12977/",
            "page_type": "Produced Video",
            "title": "Mass Balance of Ice Sheets",
            "description": "AntarcticaMusic: \"Distant Echoes,\" Adam Salkeld, Atmosphere Music Ltd. PRS; \"Evolution of Life,\" David Stephen Goldsmith, Atmosphere Music Ltd. PRSComplete transcript available. || antarc_thumb_print.jpg (1024x576) [113.1 KB] || antarc_thumb_searchweb.png (180x320) [88.3 KB] || antarc_thumb_thm.png (80x40) [6.3 KB] || Antarctica_Brunt.mov (1920x1080) [4.1 GB] || Antarctica_Brunt_facebook_720.mp4 (1280x720) [424.3 MB] || Antarctica_Brunt_twitter_720.mp4 (1280x720) [77.5 MB] || Antarctica_Brunt_youtube_1080.mp4 (1920x1080) [571.8 MB] || Antarctica_Brunt_youtube_720.mp4 (1280x720) [552.4 MB] || Antarctica_Brunt_facebook_720.webm (1280x720) [32.9 MB] || Antarctica_icesheet.en_US.srt [6.0 KB] || Antarctica_icesheet.en_US.vtt [6.0 KB] || ",
            "release_date": "2018-09-26T13:00:00-04:00",
            "update_date": "2023-05-03T13:46:25.367148-04:00",
            "main_image": {
                "id": 402977,
                "url": "https://svs.gsfc.nasa.gov/vis/a010000/a012900/a012977/greenland_thumb_print.jpg",
                "filename": "greenland_thumb_print.jpg",
                "media_type": "Image",
                "alt_text": "GreenlandMusic: \"A New Hope,\" Al Lethbridge, Atmosphere Music Ltd. PRS; \"Spirals within a Sphere,\" Adam Salkeld, Atmosphere Music Ltd. PRSComplete transcript available.",
                "width": 1024,
                "height": 577,
                "pixels": 590848
            }
        },
        {
            "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": {
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                "media_type": "Image",
                "alt_text": "Music: \"Cristal Delight,\" Fred Dubois, Killer TracksComplete transcript available.",
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                "pixels": 2073600
            }
        }
    ],
    "newer_versions": [],
    "older_versions": [],
    "alternate_versions": []
}