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    "results": [
        {
            "id": 10278,
            "url": "https://svs.gsfc.nasa.gov/10278/",
            "result_type": "Produced Video",
            "release_date": "2014-12-15T13:29:00-05:00",
            "title": "NASA's Fermi Helps Scientists Study Gamma-ray Thunderstorms",
            "description": "New research merging Fermi data with information from ground-based radar and lightning networks shows that terrestrial gamma-ray flashes arise from an unexpected diversity of storms and may be more common than currently thought. Watch this video on the NASA Goddard YouTube channel. For complete transcript, click here. || Florida_TGF_still_print.jpg (1024x576) [115.1 KB] || Florida_TGF_still.jpg (1280x720) [169.4 KB] || Florida_TGF_still_thm.png (80x40) [8.7 KB] || Florida_TGF_still_searchweb.png (320x180) [75.0 KB] || Florida_TGF_still_web.jpg (320x180) [20.8 KB] || G2014-107_Fermi_TGF_Radar_FINAL_appletv_subtitles.m4v (960x540) [66.4 MB] || 10278_Fermi_TGF_Radar_ProRes_1280x720_5994.mov (1280x720) [2.7 GB] || G2014-107_Fermi_TGF_Radar_FINAL_appletv.webm (960x540) [21.7 MB] || G2014-107_Fermi_TGF_Radar_FINAL_appletv.m4v (960x540) [66.5 MB] || 10278_Fermi_TGF_Radar_MPEG4_1280X720_2997.mp4 (1280x720) [36.8 MB] || G2014-107_Fermi_TGF_Radar_FINAL_1280x720.wmv (1280x720) [62.5 MB] || 10278_Fermi_TGF_Radar_H264_Good_1280x720_2997.mov (1280x720) [65.2 MB] || 10278_Fermi_TGF_Radar_H264_Best_1280x720_5994.mov (1280x720) [801.8 MB] || G2014-107_Fermi_TGF_Radar_FINAL_ipod_lg.m4v (640x360) [28.5 MB] || 10278_Fermi_TGF_Radar_SRT_Captions.en_US.vtt [3.7 KB] || 10278_Fermi_TGF_Radar_SRT_Captions.en_US.srt [3.7 KB] || G2014-107_Fermi_TGF_Radar_FINAL_ipod_sm.mp4 (320x240) [13.0 MB] || ",
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        },
        {
            "id": 11131,
            "url": "https://svs.gsfc.nasa.gov/11131/",
            "result_type": "Produced Video",
            "release_date": "2012-12-06T10:00:00-05:00",
            "title": "Fermi Improves Its Vision For Thunderstorm Gamma-ray Flashes",
            "description": "Thanks to improved data analysis techniques and a new operating mode, the Gamma-ray Burst Monitor (GBM) aboard NASA's Fermi Gamma-ray Space Telescope is now 10 times better at catching the brief outbursts of high-energy light mysteriously produced above thunderstorms. The outbursts, known as terrestrial gamma-ray flashes (TGFs), last only a few thousandths of a second, but their gamma rays rank among the highest-energy light that naturally occurs on Earth. The enhanced GBM discovery rate helped scientists show most TGFs also generate a strong burst of radio waves, a finding that will change how scientists study this poorly understood phenomenon.Lightning emits a broad range of very low frequency (VLF) radio waves, often heard as pop-and-crackle static when listening to AM radio. The World Wide Lightning Location Network (WWLLN), a research collaboration operated by the University of Washington in Seattle, routinely detects these radio signals and uses them to pinpoint the location of lightning discharges anywhere on the globe to within about 12 miles (20 km).Scientists have known for a long time TGFs were linked to strong VLF bursts, but they interpreted these signals as originating from lightning strokes somehow associated with the gamma-ray emission.\"Instead, we've found when a strong radio burst occurs almost simultaneously with a TGF, the radio emission is coming from the TGF itself,\" said co-author Michael Briggs, a member of the GBM team. The researchers identified much weaker radio bursts that occur up to several thousandths of a second before or after a TGF. They interpret these signals as intracloud lightning strokes related to, but not created by, the gamma-ray flash. Scientists suspect TGFs arise from the strong electric fields near the tops of thunderstorms. Under certain conditions, the field becomes strong enough that it drives a high-speed upward avalanche of electrons, which give off gamma rays when they are deflected by air molecules. \"What's new here is that the same electron avalanche likely responsible for the gamma-ray emission also produces the VLF radio bursts, and this gives us a new window into understanding this phenomenon,\" said Joseph Dwyer, a physics professor at the Florida Institute of Technology in Melbourne, Fla., and a member of the study team. Because the WWLLN radio positions are far more precise than those based on Fermi's orbit, scientists will develop a much clearer picture of where TGFs occur and perhaps which types of thunderstorms tend to produce them.Watch this video on YouTube. || ",
            "hits": 95
        },
        {
            "id": 10900,
            "url": "https://svs.gsfc.nasa.gov/10900/",
            "result_type": "Produced Video",
            "release_date": "2012-01-31T00:00:00-05:00",
            "title": "Antimatter Explosions",
            "description": "Thunderstorms produce more than just lightning. As these powerful storms roll over Earth, their electric fields can eject a burst of gamma rays known as a terrestrial gamma-ray flash. And now scientists have discovered that these flashes also create the asymmetrical opposite of matter—antimatter. NASA's Fermi Gamma-ray Space Telescope was designed to monitor gamma rays, the highest-energy form of light, in outer space. But it also observes these flashes from thunderstorms. In 2009, Fermi detected gamma rays from a thunderstorm that was located well beyond the horizon from where it could directly observe the storm. So where did the rays come from? When antimatter collides with matter, the particles annihilate and emit gamma rays. This means the gamma rays detected by Fermi could only have come from an antimatter collision with the spacecraft itself, providing the first-ever clue that these Earth-bound storms can send antimatter into space. In the videos below, see a map of terrestrial gamma-ray flashes detected by Fermi and a breakdown of how this explosive, mysterious process unfolds. || ",
            "hits": 471
        },
        {
            "id": 3747,
            "url": "https://svs.gsfc.nasa.gov/3747/",
            "result_type": "Visualization",
            "release_date": "2011-01-10T17:00:00-05:00",
            "title": "Terrestrial Gamma Flashes (TGFs) from Fermi with Static Earth",
            "description": "In this visualization, we plot the timing and locations of terrestrial gamma flashes (TGFs) observed by the Gamma Ray Burst Monitor aboard the Fermi Gamma-ray observatory.One version of the map includes the global lightning probability (the light blue glow overlaying the global map) which varies with season. We see that TGFs are roughly correlated with lightning probability. || ",
            "hits": 71
        },
        {
            "id": 3748,
            "url": "https://svs.gsfc.nasa.gov/3748/",
            "result_type": "Visualization",
            "release_date": "2011-01-10T17:00:00-05:00",
            "title": "Terrestrial Gamma Flashes (TGFs) from Fermi with Seasonal Earth",
            "description": "In this visualization, we plot the timing and locations of terrestrial gamma flashes (TGFs) observed by the Gamma Ray Burst Monitor aboard the Fermi Gamma-ray observatory.This version of the map includes the global lightning probability (the light blue glow overlaying the global map) which varies with season. The Earth's surface also illustrates some seasonal variations. We see that TGFs are roughly correlated with lightning probability, and the lightning probability correlated with seaons. There is more lightning in the summer season. || ",
            "hits": 48
        }
    ]
}