{
    "count": 4,
    "next": null,
    "previous": null,
    "results": [
        {
            "id": 5555,
            "url": "https://svs.gsfc.nasa.gov/5555/",
            "result_type": "Visualization",
            "release_date": "2025-07-15T10:00:00-04:00",
            "title": "TRACERS through Earth's Polar Cusps",
            "description": "Visualization of the orbit of the twin TRACERS (Tandem Reconnection and Cusp Electrodynamics Reconnaissance Satellites) satellites that will explore the process of magnetic reconnection in Earth's polar regions and its effects on our atmosphere.",
            "hits": 136
        },
        {
            "id": 13969,
            "url": "https://svs.gsfc.nasa.gov/13969/",
            "result_type": "Produced Video",
            "release_date": "2021-10-21T00:00:00-04:00",
            "title": "Geospace Dynamics Constellation",
            "description": "\"Moonstone,\" by Rainman [PRS]; Atmosphere; Universal Production Music || 13969_GDC_Mission_FINAL.mov (1920x1080) [4.9 GB] || GDC_MissionVideo_Still.png (1920x1080) [3.7 MB] || GDC_Mission_SITLL.jpg (1920x1080) [441.3 KB] || 13969_GDC_Mission_FINAL_lowres.mp4 (1280x720) [62.3 MB] || TWITTER_720_13969_GDC_Mission_FINAL_twitter_720.mp4 (1280x720) [42.8 MB] || 13969_GDC_Mission_FINAL.webm (960x540) [94.7 MB] || YOUTUBE_1080_13969_GDC_Mission_FINAL_youtube_1080.mp4 (1920x1080) [339.8 MB] || 13969_GDC_Mission_FINAL.en_US.srt [4.8 KB] || 13969_GDC_Mission_FINAL.en_US.vtt [4.6 KB] || YOUTUBE_4K_13969_GDC_Mission_FINAL_youtube_4k.mp4 (3840x2160) [1.4 GB] || ",
            "hits": 34
        },
        {
            "id": 4217,
            "url": "https://svs.gsfc.nasa.gov/4217/",
            "result_type": "Visualization",
            "release_date": "2014-10-08T00:00:00-04:00",
            "title": "Coordinated Earth: Measuring Space in the Near-Earth Environment",
            "description": "When we operate satellites in space, they are often taking measurements along the locations of their travel.  As with many measurements, they are only useful if they can be placed in the proper context - their relationship to other measurements at the same, and different, locations.  To assemble these measurements within context, we also need to know where and when the measurements were taken, and to do that, we need to define a coordinate system.In three-dimensional space, we define a position with three numbers, relative to a point we define as the Origin of the coordinate system, defined as (0,0,0).  Each number represents a distance from the origin along one of three directions.  We usually defined these directions by axes, labelled X, Y, and Z, which are defined to be mutually perpendicular, each one is at right angles to the others.While all coordinate systems are equal, all coordinate systems are not equally convenient for a given problem of interest.  Sometimes the data and mathematics we use for exploring different problems can be more complex in one coordinate system or another.  To simplify this, we often define a number of different coordinate systems and ways to do transformations between them.In studying the space environment around Earth, we find five different coordinate systems of use. Geocentric (GEO):  This is the coordinate system useful for measuring things close to Earth’s surface.  The origin is chosen at the center of Earth.  The x-axis points from the center of Earth through the Prime Meridian (by convention chosen as the meridian in Greenwich, London, UK (longitude = 0).  The z-axis points towards the north geographic pole. Geocentric Earth Inertial (GEI):  This coordinate system is fixed relative to the distant stars, so Earth rotates about the z-axis relative to it.  The origin of this coordinate system is at the center of the Earth. The x-axis points to the first point in Aries (Wikipedia: Vernal Equinox) and the z-axis points to the north geographic & celestial pole.  The direction of the celestial pole changes due to Earth’s rotational precession (Wikipedia). Geocentric Solar Ecliptic (GSE):  The origin is at the center of the Earth.  The x-axis is along the line between Earth and the Sun.  The z-axis is the north ecliptic pole and is fixed in direction (but for slow changes due to Earth orbital changes). Solar Magnetic (SM):  the origin is at the center of the Earth.  The z-axis is chosen parallel to the Earth magnetic dipole axis.  The y-axis is chosen to be perpendicular to the z-axis and the Earth-Sun line (pointing towards dusk). Geocentric Solar Magnetospheric (GSM):  The origin is at the center of the Earth.  The x-axis is defined as the Earth-Sun line (same as in GSE).  The y-axis is defined to be perpendicular to the plane containing the x-axis and the magnetic dipole axis so the magnetic axis always lies in this plane.Similar coordinate systems are defined for the Sun and other planets of the Solar System.Development Note: This visualization was originally developed to test coordinate system transformations in the visualization framework.References:C. T. Russell. \"Geophysical coordinate transformations\". Cosmical Electrodynamics 2, 184-196 (1971). URL.M.A. Hapgood.  \"Space Physics Coordinate Transformations: A User Guide\".  Planetary & Space Science, 40, 711-717.(1992). URLSPENVIS Help Pages: Coordinate Systems and transformations || ",
            "hits": 234
        },
        {
            "id": 3595,
            "url": "https://svs.gsfc.nasa.gov/3595/",
            "result_type": "Visualization",
            "release_date": "2009-07-27T00:00:00-04:00",
            "title": "Sentinels of the Heliosphere",
            "description": "Heliophysics is a term to describe the study of the Sun, its atmosphere or the heliosphere, and the planets within it as a system. As a result, it encompasses the study of planetary atmospheres and their magnetic environment, or magnetospheres. These environments are important in the study of space weather.As a society dependent on technology, both in everyday life, and as part of our economic growth, space weather becomes increasingly important. Changes in space weather, either by solar events or geomagnetic events, can disrupt and even damage power grids and satellite communications. Space weather events can also generate x-rays and gamma-rays, as well as particle radiations, that can jeopardize the lives of astronauts living and working in space.This visualization tours the regions of near-Earth orbit; the Earth's magnetosphere, sometimes called geospace; the region between the Earth and the Sun; and finally out beyond Pluto, where Voyager 1 and 2 are exploring the boundary between the Sun and the rest of our Milky Way galaxy. Along the way, we see these regions patrolled by a fleet of satellites that make up NASA's Heliophysics Observatory Telescopes. Many of these spacecraft do not take images in the conventional sense but record fields, particle energies and fluxes in situ. Many of these missions are operated in conjunction with international partners, such as the European Space Agency (ESA) and the Japanese Space Agency (JAXA).The Earth and distances are to scale. Larger objects are used to represent the satellites and other planets for clarity.Here are the spacecraft featured in this movie:Near-Earth Fleet:Hinode: Observes the Sun in multiple wavelengths up to x-rays. SVS pageRHESSI : Observes the Sun in x-rays and gamma-rays. SVS pageTRACE: Observes the Sun in visible and ultraviolet wavelengths. SVS pageTIMED: Studies the upper layers (40-110 miles up) of the Earth's atmosphere.FAST: Measures particles and fields in regions where aurora form.CINDI: Measures interactions of neutral and charged particles in the ionosphere. AIM: Images and measures noctilucent clouds. SVS pageGeospace Fleet:Geotail: Conducts measurements of electrons and ions in the Earth's magnetotail. Cluster: This is a group of four satellites which fly in formation to measure how particles and fields in the magnetosphere vary in space and time. SVS pageTHEMIS: This is a fleet of five satellites to study how magnetospheric instabilities produce substorms. SVS pageL1 Fleet: The L1 point is a Lagrange Point, a point between the Earth and the Sun where the gravitational pull is approximately equal. Spacecraft can orbit this location for continuous coverage of the Sun.SOHO: Studies the Sun with cameras and a multitude of other instruments. SVS pageACE: Measures the composition and characteristics of the solar wind. Wind: Measures particle flows and fields in the solar wind. Heliospheric FleetSTEREO-A and B: These two satellites observe the Sun, with imagers and particle detectors, off the Earth-Sun line, providing a 3-D view of solar activity. SVS pageHeliopause FleetVoyager 1 and 2: These spacecraft conducted the original 'Planetary Grand Tour' of the solar system in the 1970s and 1980s. They have now travelled further than any human-built spacecraft and are still returning measurements of the interplanetary medium. SVS pageThis enhanced, narrated visualization was shown at the SIGGRAPH 2009 Computer Animation Festival in New Orleans, LA in August 2009; an eariler version created for AGU was called NASA's Heliophysics Observatories Study the Sun and Geospace. || ",
            "hits": 116
        }
    ]
}