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    "nasa_science_categories": [
        "Earth"
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    "keywords": [
        "App",
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    "related": [
        {
            "id": 11481,
            "url": "https://svs.gsfc.nasa.gov/11481/",
            "page_type": "Produced Video",
            "title": "Landsat Orbit Swath",
            "description": "This visualization of the orbit of Landsat 8 is narrated by Jim Irons, LDCM Project Scientist at NASA's Goddard Space Flight Center.As a Landsat satellite flies over the surface of the Earth the instruments aboard the satellite are able to view a swath 185 kilometers wide and collect images along that swath as the satellite proceeds through its orbit. The spacecraft travels at approximately 4.7 miles per second. The satellite travels from north to south while it's over the sunlit portion of the Earth, and travels south to north over the dark side of the Earth. One orbit takes about 99 minutes, so that's about approximately 15 orbits in a 24 hour period. The orbit's maintained such that after 16 days, the entire surface of the Earth has come within view of the Landsat instruments, while sunlit, and then on day 17 the first ground path is repeated. So we get to view the entire surface once every 16 days. || ",
            "release_date": "2014-02-11T10:00:00-05:00",
            "update_date": "2023-05-03T13:51:14.032859-04:00",
            "main_image": {
                "id": 458276,
                "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011400/a011481/G2014-016_LDCM_orbit_swath.png",
                "filename": "G2014-016_LDCM_orbit_swath.png",
                "media_type": "Image",
                "alt_text": "As a Landsat satellite flies over the surface of the Earth the instruments aboard the satellite are able to view a swath 185 kilometers wide and collect images along that swath as the satellite proceeds through its orbit. The spacecraft travels at approximately 4.7 miles per second. The satellite travels from north to south while it's over the sunlit portion of the Earth, and travels south to north over the dark side of the Earth. One orbit takes about 99 minutes, so that's about approximately 15 orbits in a 24 hour period. The orbit's maintained such that after 16 days, the entire surface of the Earth has come within view of the Landsat instruments, while sunlit, and then on day 17 the first ground path is repeated. So we get to view the entire surface once every 16 days.For complete transcript, click here.Watch this video on the NASA Goddard YouTube channel.",
                "width": 1280,
                "height": 720,
                "pixels": 921600
            }
        },
        {
            "id": 3939,
            "url": "https://svs.gsfc.nasa.gov/3939/",
            "page_type": "Visualization",
            "title": "Landsat Data Continuity Mission (LDCM) Orbits",
            "description": "The Landsat Data Continuity Mission (LDCM), also to be named Landsat 8 after its scheduled launch in February 2013, will be the eighth in the series of Landsat satellites. Since 1972, Landsat satellites have been observing and measuring Earth's continental and coastal landscapes at 15 to 30 meter resolution, where human impacts and natural changes can be monitored and characterized over time.This animation portrays how the LDCM satellite will orbit the Earth 13 times per day at an altitude of 705 km collecting landcover data. With a cross-track width of 185 km, the satellite will completely cover the globe in a 16 day period compiling a total of 233 orbits. A day number and the elapsed time are shown to clearly depict the passage of time which starts slowly in the beginning and increases to day-by-day steps at the end of the animation. The terrain is exaggerated by 6 times during the first day portrayed, but is increased to 12 times when the camera pulls out to a global view. An artificial orbit trail is shown following the spacecraft to indicate its position when the satellite itself is too small to be visible. || ",
            "release_date": "2012-04-16T00:00:00-04:00",
            "update_date": "2024-10-09T00:02:13.341028-04:00",
            "main_image": {
                "id": 476636,
                "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003939/earth_compWday.0624.jpg",
                "filename": "earth_compWday.0624.jpg",
                "media_type": "Image",
                "alt_text": "The composite animation of the Landsat Data Continuity Mission (LDCM) satellite orbiting the Earth, with the satellite, Earth, stars and day/time overlay.This video is also available on our YouTube channel.",
                "width": 1920,
                "height": 1080,
                "pixels": 2073600
            }
        }
    ],
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