“Gravity Recovery and Climate Experiment”的概念、定义、翻译、参考文献-科学参考

Gravity Recovery and Climate Experiment

Space Exploration

A joint US–German project to measure the Earth's gravitational field very precisely using two satellites in a polar orbit and flying approximately 220 kilometres apart. Slight variations in the strength of the Earth's gravitational field are detected by measuring changes as small as one micrometre in distance between the two satellites as they orbit Earth. Such changes are caused not just by variations of density within the Earth but also by movements of water and ice on the surface of the Earth. The twin GRACE satellites were launched on 17 March 2002 for an intended 5-year mission, but only after 15 productive years did the satellite stop scientific operations on 27 October 2017. During their mission, the twin GRACE satellites have provided unprecedented insights into how Earth is changing.

Geology and Earth Sciences

A satellite to satellite tracking (SST) mission, launched from Plesetsk, Russia, on 17 March 2002 and originally planned to continue for five years, in which two identical minisatellites flying about 220 km apart in a circular polar orbit at an altitude of about 500 km measure variations in the distance between them caused by changes in gravity due to the uneven distribution of the Earth’s mass, providing long-term, accurate data for global, high-resolution models of the mean and time-variable components of the Earth’s gravity field. This will enable a better understanding of ocean surface currents and heat transport, changes in sea-floor pressure, and the mass balance of ice sheets and glaciers, and it will also monitor changes in the storage of water and snow on the continents. The satellites also collect data that help in compiling a detailed profile of the atmosphere. GRACE is a collaborative project between NASA and the Deutsche Forschungsanstalt für Luft- und Raumfahrt (DLR) in Germany. The GRACE-FO (follow-on) mission was launched on 22 May 2018, from California.

http://science.nasa.gov/missions/grace/ A joint DLR and NASA mission to accurately map variations in the Earth’s gravity field.

单词	Gravity Recovery and Climate Experiment
释义	Gravity Recovery and Climate Experiment Space Exploration A joint US–German project to measure the Earth's gravitational field very precisely using two satellites in a polar orbit and flying approximately 220 kilometres apart. Slight variations in the strength of the Earth's gravitational field are detected by measuring changes as small as one micrometre in distance between the two satellites as they orbit Earth. Such changes are caused not just by variations of density within the Earth but also by movements of water and ice on the surface of the Earth. The twin GRACE satellites were launched on 17 March 2002 for an intended 5-year mission, but only after 15 productive years did the satellite stop scientific operations on 27 October 2017. During their mission, the twin GRACE satellites have provided unprecedented insights into how Earth is changing. Geology and Earth Sciences A satellite to satellite tracking (SST) mission, launched from Plesetsk, Russia, on 17 March 2002 and originally planned to continue for five years, in which two identical minisatellites flying about 220 km apart in a circular polar orbit at an altitude of about 500 km measure variations in the distance between them caused by changes in gravity due to the uneven distribution of the Earth’s mass, providing long-term, accurate data for global, high-resolution models of the mean and time-variable components of the Earth’s gravity field. This will enable a better understanding of ocean surface currents and heat transport, changes in sea-floor pressure, and the mass balance of ice sheets and glaciers, and it will also monitor changes in the storage of water and snow on the continents. The satellites also collect data that help in compiling a detailed profile of the atmosphere. GRACE is a collaborative project between NASA and the Deutsche Forschungsanstalt für Luft- und Raumfahrt (DLR) in Germany. The GRACE-FO (follow-on) mission was launched on 22 May 2018, from California. http://science.nasa.gov/missions/grace/ A joint DLR and NASA mission to accurately map variations in the Earth’s gravity field.
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