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Near-field surface displacement and permanent deformation induced by the Alaska Mw 7.5 earthquake determined by high-rate real-time ambiguity-fixed PPP solutions
  • ISSN号:1002-0063
  • 期刊名称:《中国地理科学:英文版》
  • 时间:0
  • 分类:TP316.2[自动化与计算机技术—计算机软件与理论;自动化与计算机技术—计算机科学与技术] P228.4[天文地球—大地测量学与测量工程;天文地球—测绘科学与技术]
  • 作者机构:[1]Faculty of Information Engineering, Department of Surveying Engineering, China University of Geosciences, Wuhan 430074, China, [2]Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK 99775-7320, USA, [3]GNSS Research Center, Wuhan University, Wuhan 430079,China
  • 相关基金:Acknowledgments This work was supported by the National Nat- ural Science Foundation of China (41274036, 41231174), the Chinese Scholarship Council Program (201208420050), and the "111 Project" of China (B07037). The first author thanks Prof. Jeff Freymueller of the University of Alaska Fairbanks for his supervision and personal communication, as well as for the GPS measurements of the Alaska region and the basic GMT scripts for plotting Figs. 1 and 6.
中文摘要:

从连续地在阿拉斯加区域操作引用车站的美国的高率的 GPS 数据用放的最近发达的精确的点(PPP ) 被处理技术。因为当时,这些歧义没有一个整数性质,传统的 PPP 技术不修理歧义进他们的整数从单个接收装置的数据,以及精确轨道和钟修正,被使用。另外的修正,即, uncalibrated 阶段延期(UPD ) ,被需要修理整数歧义并且因而改善放精确性。这研究建议方法论计算为宽小巷并且用基于几何学的模型并且随后的 UPD 使用的 L2 (第二 L 乐队频率) 为修理歧义的答案的计算的这些参数。近地的地点的即时排水量,以及在地震以后的永久变丑,因此为 2013 年 1 月 5 日被获得,阿拉斯加地震。PPP 解决方案的即时性能被认为现实主义的数据是修正的潜伏和数据间隔估计。修理歧义的答案与歧义漂流相比。当歧义正确地被修理时,比较证明放的精确性能显著地被改进。用即时修正的答案也与用 processing 以后修正的那些相比,即,在欧洲最后的轨道和钟的轨道决心的中心。尽管因为数据潜伏和数据间隔,精确性以某种方式被降级,即时结果为在监视小规模的变丑的使用是令人满意的(12 ? 厘米) 由阿拉斯加地震引起了。另外, 7 的运动学的修理歧义的 PPP 解决方案 ? 在地震附近的天被计算获得永久地震前和地震以后的变丑。计算从的变丑即时并且 processing 以后修正不看起来显著地不同。

英文摘要:

High-rate GPS data from the United States continuously operating reference stations in the Alaska region are processed using the recently developed precise point positioning (PPP) technique. The traditional PPP technique does not fix ambiguities into their integers because these ambiguities do not have an integer nature when data from a single receiver, as well as precise orbit and clock corrections, are used. Additional corrections, i.e., uncalibrated phase delay (UPD), are needed to fix integer ambiguities and consequently improve positioning accuracy. This study proposes a methodology to compute for wide-lane and L2 (the second L-band frequency) UPDs using the geometry-based model and subsequently applies these parameters to the computation for ambiguity-fixed solutions. The instantaneous displacements of near-field sites, as well as the permanent deformations after the earthquake, are therefore obtained for the January 5, 2013, Alaska earthquake. The real-time performance of PPP solutions are assessed by considering realistic data latency and data interval of corrections. Ambiguity-fixed solutions are compared with ambiguity-float ones. The comparison shows that the positioning accuracy can be improved significantly when the ambiguities are fixed correctly. The solutions using the real-time corrections are also compared with those using post-processing corrections, i.e., Center for Orbit Determination in Europe final orbit and clock. Although the accuracy is somehow degraded because of the data latency and data interval, the real-time results are satisfactory for use in monitoring the small-scale deformation (1-2 cm) caused by the Alaska earthquake. In addition, the kinematic ambiguity-fixed PPP solutions for 7 days around the earthquake are calculated to obtain permanent pre- and post-earthquake deformations. The deformations computed from real-time and post-processing corrections do not appear to be significantly different.

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期刊信息
  • 《中国地理科学:英文版》
  • 中国科技核心期刊
  • 主管单位:中国科学院
  • 主办单位:中国科学院长春地理研究所
  • 主编:郑度
  • 地址:长春工农路16号
  • 邮编:130012
  • 邮箱:egeoscien@neigae.ac.cn
  • 电话:0431-85542243
  • 国际标准刊号:ISSN:1002-0063
  • 国内统一刊号:ISSN:22-1174/P
  • 邮发代号:
  • 获奖情况:
  • 国内外数据库收录:
  • 俄罗斯文摘杂志,荷兰地学数据库,荷兰文摘与引文数据库,美国地质文献预评数据库,美国剑桥科学文摘,美国科学引文索引(扩展库),中国中国科技核心期刊
  • 被引量:323