GRAPeS sofware for processing ibis radar data

涉及自然过程和地形的工程和科学研究项目需要精确测量位移。 这些测量传统上是使用测量设备和摄影进行的，通常是从空中进行的。 商用机载卫星技术使地形测绘发生了革命性的变化，但对大学研究来说，成本太高。 地基雷达干涉测量法是一项新技术，可以远距离监测大部分物体的移动情况，精度可达毫米以下。 这种检测小位移的灵敏度是由于测量从每个点反射的雷达波的相位差（干涉测量法）。 每一个亚毫米的位移都会引起反射波的相位差，雷达可以探测到。

Engineering and science research programs that involve natural processes and landforms require accurate measurement of displacements. These measurements are traditionally made using survey equipment and photography, and are often carried out from the air. Commercial air-borne satellite technology has revolutionized landform mapping but is cost prohibitive for university-based research. Ground-based Radar Interferometry is a new technology that allows the remote monitoring of movements of large portions with sub-millimetre accuracy. This sensitivity in detecting small displacements is due to measuring the phase differences of the radar waves (interferometry) reflected from each point. Each sub-millimetre displacement gives rise to a phase difference of the reflected wave, detectable by radar.