{ "count": 12, "next": null, "previous": null, "results": [ { "id": 14196, "url": "https://svs.gsfc.nasa.gov/14196/", "result_type": "Produced Video", "release_date": "2022-08-09T00:00:00-04:00", "title": "Earth Science Director Dr. Karen St. Germain presents to the 12th Session of the UN-Global Geospatial Information Management Committee of Experts", "description": "Complete transcript available. || KSG_UN_geodesy_trimmed.00_00_00_00.Still001.png (1920x1080) [2.1 MB] || KSG_UN_geodesy_trimmed.00_00_00_00.Still001_print.jpg (1024x576) [160.3 KB] || KSG_UN_geodesy_trimmed.00_00_00_00.Still001_searchweb.png (320x180) [87.1 KB] || KSG_UN_geodesy_trimmed.00_00_00_00.Still001_thm.png (80x40) [6.8 KB] || KSG_UN_geodesy_trimmed.mp4 (1920x1080) [401.7 MB] || KSG_UN_geodesy_trimmed.webm (1920x1080) [158.8 MB] || KSG_UN_geodesy_trimmed.en_US.srt [18.2 KB] || KSG_UN_geodesy_trimmed.en_US.vtt [18.2 KB] || ", "hits": 27 }, { "id": 4986, "url": "https://svs.gsfc.nasa.gov/4986/", "result_type": "Visualization", "release_date": "2022-03-29T11:00:00-04:00", "title": "Space Geodesy Project", "description": "NASA's Space Geodesy Project (SGP) uses a variety of space- and land-based techniques to determine the precise shape, position, and orientation of the Earth with respect to the Terrestrial Reference Frame (TRF) and Earth orientation parameters (EOP). This visualization presents a summary of these techniques.The visualization begins with a shot of natural-looking Earth, then transitions to a view that shows the orbital components of the SGP, which include global navigation satellite systems (GNSS), satellite laser ranging (SLR) and Doppler Orbitography by Radiopositioning Integrated on Satellite (DORIS). The view then moves to the surface of the Earth, showing the positions and direction of the motion of ground stations as measured by these techniques, as well by ground-based very long baseline interferometry (VLBI), which uses the radio emissions of distant quasars to determine geodetic measurements.We then zoom into the center of the Earth to show the consequence of these surface motions: the movement of the geocenter, which these techniques can determine to within millimeters. || ", "hits": 72 }, { "id": 14121, "url": "https://svs.gsfc.nasa.gov/14121/", "result_type": "Produced Video", "release_date": "2022-03-29T11:00:00-04:00", "title": "The Geocenter of the Earth Is Changing (And Why That Matters)", "description": "Stock Footage: Pond5Universal Production Music: Kinda Frantic by Steve Rucker [ASCAP]This video can be freely shared and downloaded. While the video in its entirety can be shared without permission, some individual imagery provided by pond5.com is obtained through permission and may not be excised or remixed in other products. For more information on NASA’s media guidelines, visit https://www.nasa.gov/multimedia/guidelines/index.htmlComplete transcript available. || 14121_Geodesy.jpg (1920x1080) [538.3 KB] || 14121_Geodesy_searchweb.png (320x180) [94.1 KB] || 14121_Geodesy_thm.png (80x40) [5.9 KB] || 14121_Geocenter.mp4 (1920x1080) [252.5 MB] || 14121_Geocenter_TWITTER.mp4 (1280x720) [65.3 MB] || 14121_Geocenter_TWITTER.webm (1280x720) [26.6 MB] || 14121_Geocenter.webm (1920x1080) [26.9 MB] || 14121_Geocenter_en.us.en_US.srt [5.3 KB] || 14121_Geocenter_en.us.en_US.vtt [5.1 KB] || ", "hits": 42 }, { "id": 31002, "url": "https://svs.gsfc.nasa.gov/31002/", "result_type": "Hyperwall Visual", "release_date": "2018-11-06T00:00:00-05:00", "title": "NASA's InSight Mars Lander", "description": "InSight, short for Interior Exploration using Seismic Investigations, Geodesy and Heat Transport, will investigate processes that formed and shaped Mars. Its findings will improve understanding about the evolution of our inner solar system's rocky planets, including Earth. || ", "hits": 74 }, { "id": 4376, "url": "https://svs.gsfc.nasa.gov/4376/", "result_type": "Visualization", "release_date": "2015-10-27T00:00:00-04:00", "title": "Antarctic Mass Change from GRACE derived Gravity Observations: Jan 2004 - Jun 2014", "description": "GRACE, NASA's Gravity Recovery and Climate Experiment, consists of twin co-orbiting satellites that fly in a near polar orbit separated by a distance of 220 km. GRACE precisely measures the distance between the two spacecraft in order to make detailed measurements of the Earth's gravitational field. Since its launch in 2002, GRACE has provided a continuous record of changes in the mass of the Earth's ice sheets.These animations show the change in the mass of the Antarctic Ice Sheet between January 2004 and June 2014 as measured by the pair of GRACE satellites. The 1-arc-deg NASA GSFC mascon solution data was resampled to a 5130 x 5130 data array using Kriging interpolation. A color scale was applied where blue values indicate an increase in the ice sheet mass while red shades indicate a decrease. In addition, a graph overlay shows the running total of the accumulated mass change in gigatons.Four separate animations are shown here: one of the full Antarctic Ice Sheet (above) and three of individual regional views (below) showing the regions of West Antarctica, the Antarctic Peninsula and East Antarctica. The time-series of each region is shown with a graph depicting the ice loss for the region alone. Note that the range on the color scale is different for each regional view in order to portray the most detail possible. Areas outside the region being shown are colored in a pale green to indicate that it is not included in the view. The floating ice shelves, shown in a lighter shade of green, are also not included.Technical Note: The glacial isostatic adjustment signal (Earth mass redistribution in response to historical ice loading) has been removed using the ICE-6G model (Peltier et al. 2015). || ", "hits": 23 }, { "id": 4325, "url": "https://svs.gsfc.nasa.gov/4325/", "result_type": "Visualization", "release_date": "2015-08-26T10:00:00-04:00", "title": "NASA GSFC MASCON Solution over Greenland from Jan 2004 - Jun 2014", "description": "Visualization of the mass change over Greenland from January 2004 through June 2014. The surface of Greenland shows the change in equivalent water height while the graph overlay shows the total accumulated change in gigatons. || GRACE_Greenland_wGraph_p30.1322_print.jpg (1024x576) [138.2 KB] || GRACE_Greenland_wGraph_p30.1322_searchweb.png (180x320) [84.6 KB] || GRACE_Greenland_wGraph_p30.1322_thm.png (80x40) [7.0 KB] || GRACE_Greenland_wGraph_p30_720p.webm (1280x720) [2.5 MB] || GRACE_Greenland_wGraph_p30_1080p.webm (1920x1080) [2.9 MB] || GRACE_Greenland_wGraph_p30_1080p.mp4 (1920x1080) [16.9 MB] || GRACE_Greenland_wGraph_p30_720p.mp4 (1280x720) [9.4 MB] || composite (1920x1080) [0 Item(s)] || composite (1920x1080) [0 Item(s)] || GRACE_Greenland_wGraph_p30_360p.mp4 (640x360) [3.4 MB] || MASCON_solution_greenland_4325.key [12.7 MB] || MASCON_solution_greenland_4325.pptx [10.1 MB] || ", "hits": 23 }, { "id": 4347, "url": "https://svs.gsfc.nasa.gov/4347/", "result_type": "Visualization", "release_date": "2015-08-26T10:00:00-04:00", "title": "NASA GSFC MASCON Solution over Antarctica from Jan 2004 - Jun 2014", "description": "Visualization of the mass change over the Antarctic Ice Sheet from January 2004 through June 2014. The color on the surface of the ice sheet shows the change in equivalent water height while the graph overlay shows the total accumulated change in gigatons. || GRACE_Antarctic_Wgraph_p30.2521_print.jpg (1024x576) [110.0 KB] || GRACE_Antarctic_Wgraph_p30.2521_searchweb.png (320x180) [71.0 KB] || GRACE_Antarctic_Wgraph_p30.2521_thm.png (80x40) [6.3 KB] || GRACE_Antarctic_Wgraph_p30_1080p.mp4 (1920x1080) [18.2 MB] || GRACE_Antarctic_Wgraph_p30_1080p.webm (1920x1080) [7.7 MB] || GRACE_Antarctic_Wgraph_p30_720p.mp4 (1280x720) [10.4 MB] || GRACE_Antarctic_Wgraph_p30_720p.webm (1280x720) [8.7 MB] || composite (1920x1080) [256.0 KB] || composite (1920x1080) [512.0 KB] || GRACE_Antarctic_Wgraph_p30_360p.mp4 (640x360) [3.8 MB] || MASCON_solution_antartica_4347.pptx [11.0 MB] || MASCON_solution_antartica_4347.key [13.6 MB] || ", "hits": 21 }, { "id": 11010, "url": "https://svs.gsfc.nasa.gov/11010/", "result_type": "Produced Video", "release_date": "2012-07-10T00:00:00-04:00", "title": "Sizing Up Earth", "description": "At a given point in time, Earth usually seems stable. But over centuries, lands rise and sink, continents move and the balance of the ocean shifts. These changes are tracked through the science of geodesy, dedicated to measuring and precisely charting the size and shape of Earth. Geodesy began more than 2,000 years ago, when the Greek scholar Eratosthenes calculated the circumference of Earth with impressive accuracy. In modern geodesy, scientists use multiple techniques to map the world's ice sheets, watch sea level creep up and monitor the impact of earthquakes, droughts and floods. This animated video looks at the long history of geodesy and highlights some of the technologies NASA uses, such as radio telescopes and long-range lasers, to take the basic measure of our planet. || ", "hits": 146 }, { "id": 11031, "url": "https://svs.gsfc.nasa.gov/11031/", "result_type": "Produced Video", "release_date": "2012-07-05T07:00:00-04:00", "title": "Space Geodesy Profiles", "description": "Scientists from NASA's Space Geodesy Project discuss the techniques they use to precisely measure the Earth's position in the universe, determine the Earth's center of mass, calibrate satellites, observe sea level rise, and track the movements of the tectonic plates. || ", "hits": 98 }, { "id": 10964, "url": "https://svs.gsfc.nasa.gov/10964/", "result_type": "Produced Video", "release_date": "2012-06-21T09:00:00-04:00", "title": "Using Quasars to Measure the Earth: A Brief History of VLBI", "description": "VLBI, or Very Long Baseline Interferometry, is a technique that uses multiple radio telescopes to very precisely measure the Earth's orientation. It was originally invented back in the 1960s to take better pictures of quasars, but scientists soon found out that if you threw the process in reverse, you could measure how the ground beneath the telescopes moves around, how long days really are, and how the Earth wobbles on its axis as it revolves around the sun! Learn more about VLBI here!This video is presented in both stereoscopic 3D and standard 2D versions. The labels below will help you pick which video is right for your display! || ", "hits": 50 }, { "id": 10910, "url": "https://svs.gsfc.nasa.gov/10910/", "result_type": "Produced Video", "release_date": "2012-02-23T14:00:00-05:00", "title": "Looking Down a Well: A Brief History of Geodesy", "description": "Geodesy is a field of study that deals with the measurement and representation of the Earth, and it all started when a clever human named Eratosthenes discovered that you could measure the circumference of the Earth by looking down a well. Over time, the field of geodesy has expanded and evolved dramatically, and NASA uses technology like radio telescopes, ground surveys, and satellites to contribute! Learn more about geodesy in this video! || ", "hits": 83 }, { "id": 20081, "url": "https://svs.gsfc.nasa.gov/20081/", "result_type": "Animation", "release_date": "2006-09-18T00:00:00-04:00", "title": "Geodesy", "description": "To some extent, geodesy is the study of the shape of the Earth. But it is also the study of how to find precise locations on the planet. As it relates to the study of sea level, geodesy becomes vital. The Earth is not a perfect shape and is constantly changing. Only through a very carefully constructed system of analysis can scientists achieve the necessary accuracy about the planet's shape (the so-called 'geoid') to make measurements of sea level from space. In this animation we look at how a fleet of ground based lasers and the Global Positioning Satellite fleet contribute to a mathematically representative picture of the Earth. || ", "hits": 215 } ] }