{ "count": 6, "next": null, "previous": null, "results": [ { "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": 101 }, { "id": 11631, "url": "https://svs.gsfc.nasa.gov/11631/", "result_type": "Produced Video", "release_date": "2014-08-28T00:00:00-04:00", "title": "REEL Science Communication workshop videos", "description": "In July, 2014, the three winning groups of the REEL Science Communication contest participated in a remote video production workshop with NASA communication experts and scientists to create feature videos about NASA Earth science missions. The high school students worked with scientists from the Terra, Aqua, and ICESat-2 missions. These are their resulting videos. For more information about the REEl Science Communication contest and to see the videos that won these students the opportunity to participate in the workshop, visit reelscience.gsfc.nasa.gov. || ", "hits": 24 }, { "id": 11137, "url": "https://svs.gsfc.nasa.gov/11137/", "result_type": "Produced Video", "release_date": "2013-01-17T12:00:00-05:00", "title": "NASA Beams Mona Lisa to Lunar Reconnaissance Orbiter at the Moon", "description": "As part of the first demonstration of laser communication with a satellite at the moon, scientists with NASA's Lunar Reconnaissance Orbiter (LRO) beamed an image of the Mona Lisa to the spacecraft from Earth.The iconic image traveled nearly 240,000 miles in digital form from the Next Generation Satellite Laser Ranging (NGSLR) Station at NASA's Goddard Space Flight Center in Greenbelt, MD, to the Lunar Orbiter Laser Altimeter (LOLA) instrument on the spacecraft. By transmitting the image piggyback on laser pulses that are routinely sent to track LOLA's position, the team achieved simultaneous laser communication and tracking.To learn more about how it happened, watch the video below! || ", "hits": 42 }, { "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": 33 }, { "id": 3808, "url": "https://svs.gsfc.nasa.gov/3808/", "result_type": "Visualization", "release_date": "2010-12-17T00:00:00-05:00", "title": "LOLA Stills for AGU 2010", "description": "These high resolution still images illustrate the global elevation map of the Moon being developed by the laser altimeter (LOLA) on Lunar Reconnaissance Orbiter. To date, LOLA has measured the elevation of over two billion points on the surface of the Moon. These measurements make it possible to render shaded relief maps of the Moon with unprecedented accuracy and detail. See also this comparison of LOLA with past maps.The waning gibbous Moon is rendered from three points of view. For each view, a natural color image is paired with a false color version in which low elevations are blue to green and high elevations are yellow to red. The terrain is in highest relief near the terminator, or shadow line, where the Sun is setting on a month-long lunar day. Amateur astronomers pay particular attention to features near the terminator, since the high relief brings out details that are normally washed out in the glare of reflected sunlight. || ", "hits": 109 }, { "id": 10336, "url": "https://svs.gsfc.nasa.gov/10336/", "result_type": "Produced Video", "release_date": "2008-08-15T00:00:00-04:00", "title": "Star Trackers Light the Way", "description": "The Autonomous Star Trackers provide attitude data and motion rate of the satellite. They are based on a radiation hardened design and proprietary algorithms that ensure accurate and robust 3-axes attitude determination. These same instruments most recently flew onboard NASA's Messenger and Mars Reconnaissance Orbiter missions. For complete transcript, click here. || StarTrackers_HD_WEB_A-V_100577_print.jpg (1024x768) [76.0 KB] || StarTrackers_HD_WEB_A-V_1_web.png (320x240) [164.2 KB] || StarTrackers_HD_Web_A-V2_1_thm.png (80x40) [16.1 KB] || StarTrackers_HD_WEB_A-V_1_searchweb.png (320x180) [66.9 KB] || StarTrackers_HD_WEB_A-V_1.webmhd.webm (960x540) [26.6 MB] || StarTrackers_HD_WEB_A-V_1.mp4 (640x480) [59.4 MB] || StarTrackers_HD_Web_A-V2_1.mpg (640x360) [41.5 MB] || StarTrackers_ipod.m4v (640x480) [29.6 MB] || StarTrackers_HD_WEB_A-V_2.mp4 (320x240) [37.9 MB] || StarTrackers_HD_WEB_A-V_1.wmv (344x260) [35.8 MB] || ", "hits": 41 } ] }