Integrated velocity field from ground and satellite geodetic techniques: application to Arenal volcano
Integrated velocity field from ground and satellite geodetic techniques: application to Arenal volcano
复制标题
DOI：
10.1093/gji/ggu444
复制
发表时间：
2015-02
影响因子：
2.8
通讯作者：
Cyril Muller;R. D. Potro;J. Biggs;J. Gottsmann;S. Ebmeier;S. Guillaume;P. Cattin;R. V. D. Laat-
中科院分区：
文献类型：
--
作者：
Cyril Muller;R. D. Potro;J. Biggs;J. Gottsmann;S. Ebmeier;S. Guillaume;P. Cattin;R. V. D. Laat-
地面变形的测量可以用来识别和解释火山上发生的地球物理过程。大多数研究依赖于单一的大地测量技术，或将地球物理模型拟合到多种大地测量技术的结果中。在这里，我们提出了一种方法，将GPS，全站仪测量和InSAR结合到一个参考框架中，在没有任何事先的地球物理假设的情况下产生一个集成的三维大地速度面。该方法包括五个步骤：网络设计、数据采集和处理、测量数据的空间整合、时间序列计算以及时空测量数据的整合。该方法最显著的改进是：(1)减少了所需的现场时间；(2)明确地检测了异常值；(3)提高了测量精度；(4)构建了三维大地速度场。我们将此方法应用于阿雷纳尔西侧正在进行的行动。阿雷纳尔火山的多种测量技术的综合揭示了一个比单个大地测量技术描述的更复杂的变形场，但与以前的研究保持一致。这种方法可以应用于世界范围内的火山监测，并有可能扩展到结合其他大地测量技术和研究瞬态变形。
Measurements of ground deformation can be used to identify and interpret geophysical processes occurring at volcanoes. Most studies rely on a single geodetic technique, or fit a geophysical model to the results of multiple geodetic techniques. Here we present a methodology that combines GPS, Total Station measurements and InSAR into a single reference frame to produce an integrated 3-D geodetic velocity surface without any prior geophysical assumptions. The methodology consists of five steps: design of the network, acquisition and processing of the data, spatial integration of the measurements, time series computation and finally the integration of spatial and temporal measurements. The most significant improvements of this method are (1) the reduction of the required field time, (2) the unambiguous detection of outliers, (3) an increased measurement accuracy and (4) the construction of a 3-D geodetic velocity field. We apply this methodology to ongoing motion on Arenal’s western flank. Integration of multiple measurement techniques at Arenal volcano revealed a deformation field that is more complex than that described by individual geodetic techniques, yet remains consistent with previous studies. This approach can be applied to volcano monitoring worldwide and has the potential to be extended to incorporate other geodetic techniques and to study transient deformation.