کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4688851 1635811 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Contributions of GPS and VLBI for understanding station motions
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
Contributions of GPS and VLBI for understanding station motions
چکیده انگلیسی
The occurrence of non-secular signals in site positions is well known. Since a few years, a main objective of research has been the separation of apparent motions from real geophysical motions and deformations. We investigated eight weekly Global Positioning System (GPS), one daily solution from Scripps Orbit and Permanent Array Center (SOPAC), and two Very Long Baseline Interferometry (VLBI) station coordinate time series and the corresponding baselines. One major hurdle in our investigation was the handling of constraints imposed on the GPS solutions. Seasonal signals in the height component with amplitudes of up to 9 mm for a few sites on the Asian continent were recovered. For baselines longer than 5000 km, the precision of the GPS technique is superior to the VLBI technique from the point of view of repeatability. The improvement on VLBI baseline repeatability after applying the atmospheric pressure loading time series provided by the Goddard Space Flight Center (GSFC) VLBI group reaches 3.3% (median value). Coordinate time series or baseline lengths derived from GPS and VLBI Analysis Centers (ACs) solutions have not yet achieved an unambiguously assessment of sub-cm agreement.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Geodynamics - Volume 41, Issues 1–3, January–April 2006, Pages 87-93
نویسندگان
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