Definition
Geodesy. The branch of Earth Sciences concerned with the size, shape, orientation, and gravity field of the Earth.
Global Navigation Satellite Systems (GNSS). Satellite navigation systems that provide geo-spatial positioning with global coverage.
Very Long BaselineInterferometry (VLBI). A radio-astronomical technique utilizing globally distributed antennas having independent atomic clocks. The antennas collectively form an interferometer or synthetic aperture.
Gravimetry. That branch of the geosciences concerned with the measurement of the force or acceleration of gravity.
International Terrestrial Reference Frame (ITRF). The internationally agreed terrestrial reference frame, defining longitude and latitude at a number of reference points, thus forming the basis for much global positioning.
Introduction
Geodesy is comprised of three “pillars”: the shape of the Earth, its orientation, and its gravity field.
Geodesists first consider the global scale and then proceed to the...
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Acknowledgment
This research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the NASA.
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Klatt, C. (2014). Geodesy∗. In: Njoku, E.G. (eds) Encyclopedia of Remote Sensing. Encyclopedia of Earth Sciences Series. Springer, New York, NY. https://doi.org/10.1007/978-0-387-36699-9_50
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