Natural Hazards and Earth System Sciences
Natural Hazards and Earth System Sciences
NHESS
Articles | Volume 15, issue 4
Articles | Volume 15, issue 4
https://doi.org/10.5194/nhess-15-875-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/nhess-15-875-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 15, issue 4
Research article
 | 
21 Apr 2015
Research article |  | 21 Apr 2015

Accuracy of velocities from repeated GPS measurements

V. Akarsu, D. U. Sanli, and E. Arslan

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Latest update: 13 Mar 2025
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Short summary
Deformation rates obtained using repeated GPS measurements from as short as 8--12h are severely biased. GIPSY processing results from a global GPS network revealed that 60--70% of the horizontal and 100% of the vertical velocities are not usable. GIPSY processing is equivalent to relative positioning in which the baseline lengths to reference stations are at several hundred kilometers. This scale requires that the session length for GPS campaigns needs to be no shorter than 24h.
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