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Sensors 2016, 16(2), 225; doi:10.3390/s16020225

A Unified Global Reference Frame of Vertical Crustal Movements by Satellite Laser Ranging

1
Zhengzhou Institute of Surveying and Mapping, 66 Longhai Road, Zhengzhou 450052, China
2
School of Civil and Environment Engineering, University of New South Wales, Sydney 2052, Australia
*
Author to whom correspondence should be addressed.
Received: 5 December 2015 / Revised: 3 February 2016 / Accepted: 3 February 2016 / Published: 8 February 2016
(This article belongs to the Section Remote Sensors)
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Abstract

Crustal movement is one of the main factors influencing the change of the Earth system, especially in its vertical direction, which affects people’s daily life through the frequent occurrence of earthquakes, geological disasters, and so on. In order to get a better study and application of the vertical crustal movement,as well as its changes, the foundation and prerequisite areto devise and establish its reference frame; especially, a unified global reference frame is required. Since SLR (satellite laser ranging) is one of the most accurate space techniques for monitoring geocentric motion and can directly measure the ground station’s geocentric coordinates and velocities relative to the centre of the Earth’s mass, we proposed to take the vertical velocity of the SLR technique in the ITRF2008 framework as the reference frame of vertical crustal motion, which we defined as the SLR vertical reference frame (SVRF). The systematic bias between other velocity fields and the SVRF was resolved by using the GPS (Global Positioning System) and VLBI (very long baseline interferometry) velocity observations, and the unity of other velocity fields and SVRF was realized,as well. The results show that it is feasible and suitable to take the SVRF as a reference frame, which has both geophysical meanings and geodetic observations, so we recommend taking the SLR vertical velocity under ITRF2008 as the global reference frame of vertical crustal movement. View Full-Text
Keywords: vertical crustal movement; reference frame; SLR (satellite laser ranging); ITRF (International Terrestrial Reference Frame); systematic bias model vertical crustal movement; reference frame; SLR (satellite laser ranging); ITRF (International Terrestrial Reference Frame); systematic bias model
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Zhu, X.; Wang, R.; Sun, F.; Wang, J. A Unified Global Reference Frame of Vertical Crustal Movements by Satellite Laser Ranging. Sensors 2016, 16, 225.

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