在玉树地震中, 中国首套自主知识产权的机载多波段多极化干涉SAR测图系统, 发挥全天时主动遥感的优势, 成功服务于抗震救灾中。依据玉树地震灾情综合地理信息监测与评估工作, 着重探讨SAR遥感影像用于地震灾情监测与评估中的处理方法和技术路线, 研究制定了地震灾区灾情综合地理信息监测指标, 通过快速几何处理、快速变化信息提取、快速目标判读和灾害空间危险性评估, 实现了玉树地震震区灾情综合地理信息的解译、制图和统计评估。在此基础上, 开发了玉树地震灾情综合地理信息服务系统, 实现了灾情监测信息的综合管理、可视化查询和统计分析。

The SAR system with its all-weather and all-time imaging capabilities emerged as a very important remote sensing data source for earthquake monitoring and disaster relief. After the recently occurred earthquake in Yushu county, Qinghai province, an airborne SAR system equipped with X-band dual antenna interferometric sensor and P-band fully polarized sensor has been successfully used in disaster monitoring and relief actions. The system is the first airborne SAR system with full intellectual property owned by China. This paper summarizes the Yushu Earthquake remote sensing monitoring and information service system, including the data, processing methodologies and information service. The emphasis is put on the application of airborne SAR images to disaster information extraction and assessment. First, the parameters characterizing the content of earthquake disaster remote sensing monitoring are determined, which include the information of urban and rural residence, infrastrcucture, geological disasters and farmland damage. The processing methodologies of optical and SAR data for earthquake disaster information interpretation, mapping and risk evaluation are presented. The process chain consists of quick geometric processing, change detection, quick target interpretation and quick spatial risk assessment for disaster. On the basis of the earthquake information including those extracted from remotely sensed images and other existing social and geospatial data, a system of Yushu Earthquake disaster situation geographic information service has been developed, to facilitate the management, visu-alization, and statistical analysis of the earthquake disaster information.