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高频GPS双差残差模型监测强震地表运动

DOI: 10.6038/cjg20130915, PP. 3022-3028

Keywords: 高频GPS,双差残差模型,强震地面运动,实时动态监测

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Abstract:

根据震时地表震动持续时间短的特点,以及双差残差的相关性,提出了基于双差残差建模的高频GPS强震位移监测方法.首先对震前若干历元各双差残差进行建模,地震发生后,利用模型对各双差残差进行预报,最后利用预报残差实现短时间尺度内的位移解算.利用一条长约1100km基线的静态数据和ElMayor-Cucapah7.2级地震的94个测站数据进行试验分析,结果表明,5min预测时间内,静态数据的动态位移在N、E、U三个方向的定位中误差分别为6mm、6mm和13mm,地震数据的解算结果与实际情况有较好的一致性.

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