Jason-2卫星波形重定技术在研究贝加尔湖水位中的应用

Application of Jason-2 waveform retracking method to investigation of water level of Lake Baikal

利用Jason-2测高卫星2008—2013年的Waveform数据,以贝加尔湖为例,研究卫星测高数据编辑标准、地球物理改正方法及波形重定方法;利用波形重定后的数据计算贝加尔湖年水位异常时间序列与季度水位异常时间序列,分析得到贝加尔湖水位的季节性变化规律;利用组合模型预测贝加尔湖2013年10月的水位,并与测高所得水位进行了比较。研究结果表明,利用波形重构技术可提高对贝加尔湖水位测量精度,对其水位变化研究具有一定的可行性。

Based on the waveform data of the Jason-2 altimetry satellite from 2008 to 2013,the editing standard,geophysical correction method,and waveform retracking method for satellite altimeter data were studied using Lake Baikal as a case study. The annual and seasonal time series of the abnormal water level of Lake Baikal were calculated using the waveform retracking data,and the seasonal variation rules of the water level were analyzed.The water level of Lake Baikal in October 2013 was predicted using a combined model and compared with the altimeter-derived water level. The results show that the waveform retracking method improves the measurement accuracy of the water level of Lake Baikal,and this is a feasible method of investigating the variation of water level.