中文摘要：

研究目的：介绍合成孔径雷达干涉测量新技术的原理、干涉数据几何模式、数据处理流程、高程干涉测量和形变差分干涉测量方法；比较雷达干涉测量技术与当前常用的数字高程模型生产方法，分析铁路地质灾害监测与青藏线多年冻土区形变长期监测应用星载合成孔径雷达差分干涉测量技术的潜力。研究结论：（1）与常用的DEM生产方式相比较，合成孔径雷达干涉测量技术具有一些独特优势，适合快速获取各种范围、高精度、高分辨率的DEM；（2）在铁路勘测设计DEM获取、铁路地质灾害遥感监测和青藏线多年冻土区形变测量等方面应用潜力巨大，建议铁路工程部门开展该技术的应用研究。

英文摘要：

Research purposes： In the paper, the instruction is given to the principle, data acquirement geometry and data processing flowchart of SAR interferometry, including elevation measurement interferometry and deformation measurement differential interferometry. The comparison is made for technology with other digital elevation model generation methods. The application potentialities of radar differential interferometry to railway geologic disaster and roadbed deformation monitoring of Qinghai -Tibet Railway in permafrost zone are analyzed. Research conclusions：（ 1 ） SAR interferometry has some unique advantages, and is suitable for the DEM with various range, high precision and high resolution. （2） The technology has huge application potentiality for railway survey and design, railway geologic disaster and roadbed deformation monitoring of Qinghai -Tibet Railway in permafrost zone.