摘要
为了提高沉降监测技术的空间采样率及监测精度,分别采用永久散射体(permanent scatters,PS)、短基线集法(small baseline subsets,SBAS)和斯坦福永久散射体-多时相In SAR(stanford method for persistent scat-terers-multi-temporal In SAR,Sta MPS-MTI)技术,以覆盖上海地区的25景Envisatasar数据为数据源,获取了该区域2007-2010年期间的年平均沉降速率图。同时将3种方法获取的高相干点个数进行对比,Sta MPS-MTI技术的空间采样率比PS方法提高了17. 2%,比SBAS方法提高了546%。与PS、SBAS方法相比,Sta MPS-MTI技术获取的结果精度略高于PS和SBAS技术。结果表明,相对于PS和SBAS方法而言,利用Sta MPS-MTI技术监测城市地面沉降可以增加高相干点的测量精度与空间采样率,进而提高了结果的可靠性和稳定性。
In order to improve the spatial sampling rate and monitoring accuracy of sedimentation monitoring technology,the PS(permanent scatters),SBAS(small baseline subsets)and StaMPS-MTI(stanford method for persistent scatterers-multi-temporal InSAR)technology were used to process the 25-view Envisatasar data covering Shanghai area.The annual average subsidence rate of the region from 2007 to 2010 was obtained.The number of points while the high coherence acquired three methods are compared,the spatial sampling rate StaMPS-MTI technology improved method PS 17.2%,54.6%increased compared SBAS method.Compared with the PS method and the SBAS method,the StaMPS-MTI method is slightly more accurate than the PS technology and the SBAS technology.The results show that,relative to PS method and SBAS method using StaMPS-MTI technology can increase the monitoring of urban land subsidence measurement accuracy and high spatial coherency point sampling rate,thereby improving the reliability and stability of the results.
作者
郑坤
聂运菊
罗跃
李永飞
ZHENG Kun;NIE Yunju;LUO Yue;LI Yongfei(Faculty of Geomatics,East China University of Technology,330013,Nanchang,PRC;School of Water Resources&Environmental Engineering,East China University of Technology,330013,Nanchang,PRC)
出处
《江西科学》
2019年第1期108-111,124,共5页
Jiangxi Science
基金
江西省数字国土重点实验项目(DLLJ201718)
国家自然科学基金(41602258)
