NDLI: Recent Results for the Arabian Plate Motion Using Satellite Laser Ranging Observations of Riyadh SLR Station to LAGEOS-1 and LAGEOS-2 Satellites

Content Provider	Springer Nature Link
Author	Alothman, A. O. Schillak, S.
Copyright Year	2013
Abstract	Saudi Arabia Laser Ranging Observatory (SALRO-7832) has been established in 1995 and is situated in the Arabian tectonic plate which is countering a north east motion. Laser ranging observations of about 20 global SLR stations to LAGEOS-1 and LAGEOS-2 satellites collected for 14 years (1996–2009) have been used to determine Riyadh SLR station positions and velocity. The NASA Goddard’s GEODYN-II orbital software has been used to perform orbit determination of these two satellites. The computations were performed on the basis of 114 monthly arcs of observations with the total number of normal points of 33,708 and 40,168 for LAGEOS-1 and LAGEOS-2, respectively. The geocentric coordinates were computed and then transformed to the topocentric North, East and vertical components in reference to the ITRF2008 terrestrial reference frame. The range biases of the Riyadh SLR station in the whole period of study were 2.5 and 2.0 mm with long-term bias stability 7.5 and 7.2 mm for LAGEOS-1 and LAGEOS-2 satellites, respectively. The orbital RMS of fit for all stations was equal to 16.4 mm for the whole period. The stability of the time series positions in form of RMS of the X, Y, Z component residuals w.r.t. a linear trend for Riyadh SLR station were 10.1, 9.3, and 9.0 mm, respectively. 3D deviation from ITRF2008 position was equal to 4.5 mm. The velocities were 29.1 ± 0.2, 31.6 ± 0.2, and 1.9 ± 0.3 mm/year in the North, East and vertical directions, respectively, with a horizontal and 3D velocity 42.9 ± 0.2 mm/year and azimuth 47.4 ± 0.8 arc degrees. The central part of the Arabian tectonic plate motion was precisely determined from the Riyadh SLR data and the results showed a good agreement with ITRF2008 velocity, geological model NNR NUVEL1A and with recent GPS estimates. This paper includes a full discussion of the results of Riyadh SLR station collected over 14 years of activity and gives the absolute movement of the central part of the Arabian tectonic plate (velocity and azimuth).
Starting Page	217
Ending Page	226
Page Count	10
File Format	PDF
ISSN	13198025
Journal	Arabian Journal for Science and Engineering
Volume Number	39
Issue Number	1
e-ISSN	21914281
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-11-01
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	SLR LAGEOS-1 LAGEOS-2 Tectonic plate GEODYN-II Orbit determination Velocity ITRF2008 NNR NUVEL1A GPS Engineering Science
Content Type	Text
Resource Type	Article

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