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    "title": "Tracking Data Relay Satellite (TDRS) Orbital Fleet Communicating with User Spacecraft",
    "description": "The Tracking Data Relay Satellite (TDRS) fleet has provided spacecraft communications and tracking since the 1980's. Designed to replace most ground stations and provide longer periods of coverage, TDRS spacecraft have become an indispensable component of both manned and unmanned Earth orbiting space missions.This visualization begins by showing how a typical spacecract (NIMBUS-7) communicated with the ground before TDRS. The spacecraft occassionally communicated with ground stations as its orbit briefly took it within range. This required ground stations to be spread all over the world and only allowed for sporatic communications between spacecraft and the ground.As the animation continues, the TDRS fleet of spacecraft are introduced and a typical modern-day spacecraft, the Tropical Rainfall Measuring Mission (TRMM), is also introduced. As TRMM orbits the Earth, various TDRS spacrecraft are able to track and communicate with TRMM. This contact could be continuous, but for most spacecraft, continuous coverage is unnecessary. Constant communications between TDRS spacecraft and ground stations at White Sands and Guam are shown.The visualization then adds many of the other TDRS users and shows how they communicate.An additional (\"extra\") visualizaiton of the TDRS fleet communicating with user spacecraft is provided from a slightly different angle. These animations were created for a video supporting the launch of TDRS-12 (also called TDRS-L). || ",
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            "title": "The Network",
            "description": "Names like the Hubble Space Telescope and the International Space Station frequently make headline news for their groundbreaking achievements. Such stardom, however, would be difficult without the crucial support of NASA’s lesser known Tracking and Data Relay Satellites, or TDRS. The eight satellites that currently compose the fleet provide continuous connectivity for sending navigation, data and voice transmissions from Earth to the space station, Hubble and a host of other spacecraft. Without them, communications with ground stations would be limited to just 15 percent of the time. Watch the video to learn more. || ",
            "release_date": "2014-02-11T00:00:00-05:00",
            "update_date": "2023-05-03T13:51:14.207858-04:00",
            "main_image": {
                "id": 458355,
                "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011400/a011450/c-1024.jpg",
                "filename": "c-1024.jpg",
                "media_type": "Image",
                "alt_text": "NASA’s solution for obtaining unlimited talk, text and data in space.",
                "width": 1024,
                "height": 576,
                "pixels": 589824
            }
        },
        {
            "id": 11214,
            "url": "https://svs.gsfc.nasa.gov/11214/",
            "page_type": "Produced Video",
            "title": "TDRS: The Network That Enables Exploration",
            "description": "NASA is preparing to launch the second, in a series of three, third generation advanced Tracking and Data Relay Satellites, known as TDRS. This latest addition to the fleet of eight, TDRS-L, will augment a space communications network that provides the critical path for high data-rate communication to the International Space Station, Hubble Space Telescope, human occupied spacecraft and a host of other spacecraft. || ",
            "release_date": "2014-01-21T13:00:00-05:00",
            "update_date": "2023-05-03T13:51:18.085492-04:00",
            "main_image": {
                "id": 459322,
                "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011200/a011214/TDRS-L-Network.png",
                "filename": "TDRS-L-Network.png",
                "media_type": "Image",
                "alt_text": "In 1983, NASA launched the first of a series of new communication and navigation satellites that would rely less on international ground stations and provide continuous coverage. For complete transcript, click here.This video is also available on our YouTube channel.",
                "width": 1920,
                "height": 1080,
                "pixels": 2073600
            }
        }
    ],
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}