SIRGAS Core Network Stability

SIRGAS Core Network Stability
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SIRGAS 核心网络稳定性

DOI:
10.1007/1345_2015_143
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
Martínez-Díaz W.
Martínez-Díaz W.
中科院分区:
--
文献类型:
--
作者:
Sánchez L;Drewes H;Brunini C;Mackern M.V;Martínez-Díaz W.

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SIRGAS(Sistema de Referencia Geocéntrico帕拉las Américas)的主要目标是提供精确的空间和时间基准基础设施,作为地球系统研究的基础,并支持基于高精度定位的科学和实际应用。根据这一目的,在过去几年中,在扩展、分析和维护这一参照框架方面取得了重大成就。然而,仍有一些尚未解决的问题阻碍着达到尽可能高的精确度。特别是,与地震有关的变形和非线性台站运动的同化是非常困难的,其省略大大降低了SIRGAS作为高精度参考框架的可靠性。为了进一步解决这些不便之处,本文提出了2010年2月智利马乌莱地区发生强烈地震后计算的SIRGAS参考系的第一个运动学模型。该模型基于2010年4月18日至2013年6月15日的每周自由正态方程的组合。计算的台站位置和速度参考IGb 08参考框架(IGS实现ITRF 2008),epoch 2012.0。基准历元台站位置的均方根平均精度为水平±1.4 mm,垂直±2.5 mm;恒速台站位置的均方根平均精度为水平±0.8 mm/年,垂直±1.2 mm/年。与基于地震前测量的参考框架(如ITRF 2008或以前的SIRGAS解决方案)进行比较,可以明显看出这次地震造成的强烈变形以及相应更新受影响地区参考框架的必要性。
The main objective of SIRGAS (Sistema de Referencia Geocéntrico para las Américas) is to provide an accurate spatial and time-referenced infrastructure as a basis for Earth System research and to support scientific and practical applications based on high-precise positioning. Following this purpose, significant achievements related to the extension, analysis, and maintenance of this reference frame have been reached during the last years. However, there are still unresolved problems hindering the attainment of the best possible precision. In particular, the assimilation of seismic-related deformations and non-lineal station movements is very difficult and its omission considerably reduces the reliability of SIRGAS as a high precision reference frame. To advance in the solution of these inconveniences, this paper presents the first kinematic model of the SIRGAS reference frame computed after the strong earthquake occurred in the Chilean region of Maule in February 2010. This model is based on the combination of weekly free normal equations covering the time span from April 18, 2010 to June 15, 2013. Computed station positions and velocities refer to the IGb08 reference frame (the IGS realisation of the ITRF2008), epoch 2012.0. The averaged rms precision is ±1.4 mm horizontally and ±2.5 mm vertically for the station positions at the reference epoch, and ±0.8 mm/year horizontally and ±1.2 mm/year vertically for the constant velocities. Comparisons with reference frames based on measurements before the earthquake (like ITRF2008 or former SIRGAS solutions) make evident the strong deformation caused by this earthquake and the necessity of updating accordingly the reference frames in the affected region.
SIRGAS 的成就与挑战
DOI: 10.1007/978-3-642-00860-3_25
发表时间: 2009
期刊: Journal of Geodesy
影响因子: 4.4
作者:
L. Sánchez;C. Brunini
通讯作者: C. Brunini
IGS 区域网络联合分析中心 (IGS RNAAC SIR) 的全新多年位置和速度解决方案 SIR09P01
DOI: --
发表时间: 2012
期刊:
影响因子: --
作者:
W. Seemüller;M. Seitz;L. Sánchez;H. Drewes
通讯作者: H. Drewes
SIRGAS 处理中心为 SIRGAS-CON 参考框架提供的每周解决方案组合
DOI: --
发表时间: 2012
期刊:
影响因子: --
作者:
L. Sánchez;W. Seemüller;M. Seitz
通讯作者: M. Seitz
DOI: --
发表时间: 2012
期刊:
影响因子: --
作者:
L. Sánchez
通讯作者: L. Sánchez
IBGE 分析中心对 SIRGAS-CON 网络的处理评估
DOI: --
发表时间: 2012
期刊:
影响因子: --
作者:
S. M. A. Costa;A. L. Silva;J. Vaz
通讯作者: J. Vaz