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},
{
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}
},
{
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},
{
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},
{
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},
{
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}
},
{
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}
},
{
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},
{
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},
{
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},
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},
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},
{
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},
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},
{
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},
{
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},
{
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},
{
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}
},
{
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}
},
{
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}
},
{
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}
},
{
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}
},
{
"orgName": "Geospace Physics Laboratory",
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"secondary": "geospace"
}
},
{
"orgName": "Space Weather Laboratory",
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"secondary": "spaceweather"
}
},
{
"orgName": "Ionospheric, Thermospheric, Mesospheric (ITM) Physics Laboratory",
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}
},
{
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}
},
{
"orgName": "Solar System Exploration Data Services Office",
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"secondary": "dataarchives"
}
},
{
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}
},
{
"orgName": "Planetary Systems Lab",
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}
},
{
"orgName": "Planetary Magnetospheres Lab",
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"secondary": "magnetospheres"
}
},
{
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"secondary": "p3g"
}
},
{
"orgName": "Planetary Environments Laboratory ",
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"secondary": "atmosenvironments"
}
}
]
Operational
A-Train: The Afternoon Constellation (A-Train)
NASA and its international partners operate several Earth-observing satellites that closely follow one another along the same (or very similar) orbital “track.” A particular example of a coordinated group of satellites are in a sun-synchronous polar orbit, crossing the equator in an ascending (northbound) direction at about 1:30 PM local solar time, within seconds to minutes of each other—hence the name Afternoon Constellation. This allows near-simultaneous observations from a wide variety of instruments that are synergistically used to aid the scientific community in advancing our knowledge of Earth-system science and applying this knowledge for the benefit of society.
Organization
NASA and its international partners operate several Earth-observing satellites that closely follow one another along the same (or very similar) orbital “track.” A particular example of a coordinated group of satellites are in a sun-synchronous polar orbit, crossing the equator in an ascending (northbound) direction at about 1:30 PM local solar time, within seconds to minutes of each other—hence the name Afternoon Constellation. This allows near-simultaneous observations from a wide variety of instruments that are synergistically used to aid the scientific community in advancing our knowledge of Earth-system science and applying this knowledge for the benefit of society.