Tag Archives: Grace Satellite

Geodynamics

Mean Gravity Field Image credit: Unless otherwise noted, images are provided by University of Texas Center for Space Research and NASA ¬†On planet Earth, we tend to think of the gravitational effect as being the same no matter where we … Continue reading

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Evolved Laser Interferometer Space Antenna

View of amplified effects of a + polarized gravitational wave (stylized) on eLISA laser beams / arms paths. Detector noise curves for LISA and eLISA as a function of frequency. They lie in between the bands for ground-based detectors like … Continue reading

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It’s Final Endgame for GRAIL’s Twin Spacecraft

The mountain where the two spacecraft will make contact is located near a crater named Goldschmidt. Both spacecraft have been flying in formation around the moon since Jan. 1, 2012. They were named by elementary school students in Bozeman, Mont., … Continue reading

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GRAIL’s Gravity Tour of the Moon

http://www.jpl.nasa.gov/videos/grail/20121205/GRAILtour20121205-640.swfEmbedded video from NASA Jet Propulsion Laboratory California Institute of Technology This movie shows the variations in the lunar gravity field as measured by NASA’s Gravity Recovery and Interior Laboratory (GRAIL) during the primary mapping mission from March to May … Continue reading

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Gravimetry

Gravity map of the Southern Ocean around the Antarctic continentThis gravity field was computed from sea-surface height measurements collected by the US Navy GEOSAT altimeter between March, 1985, and January, 1990. The high density GEOSAT Geodetic Mission data that lie … Continue reading

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Grail At the Moon

 Grail Recovery and Interior Labratory NASA’s Gravity Recovery And Interior Laboratory (GRAIL)-A spacecraft successfully completed its planned main engine burn at 2 p.m. PST (5 p.m. EST) today. As of 3 p.m. PST (6 p.m. EST), GRAIL-A is in a … Continue reading

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Space Geodesy

 Project manager Stephen Merkowitz talks about his work with NASA’s Space Geodesy Project, including a brief overview of the four fundamental techniques of space geodesy: GPS, VLBI, SLR, and DORIS. Learn more about space geodesy at: http://space-geodesy.nasa.gov/ This video is … Continue reading

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Core Optics

A pair of polished Advanced LIGO end mirrors (ETM’s) Core optics are the 40-kg masses that form the heart of a LIGO detector. A core optic is manufactured from fused silica, polished to a few nanometers of smoothness and coated … Continue reading

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Geodesy and geophysics

Mean Gravity Field Anomalies by definition would require that we understand something about our selves that we did not know before, in that the whole history of you, is a large synopsis of everything that thinks and breath? Imagine indeed … Continue reading

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Grail: Gravity Recovery and Interior Laboratory

GRAIL Spacecraft Logo NASA’s Gravity Recovery and Interior Laboratory, or GRAIL, spacecraft logo is emblazoned on the first stage of a United Launch Alliance Delta II launch vehicle, now secured in the gantry at Cape Canaveral Air Force Station’s Space … Continue reading

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