冰川动态变化监测有助于反应全球和区域气候演变，保护自然环境和自然资源。

Dynamic Monitoring of glaciers contribute to global and regional climate evolution reaction, protect the natural environment and natural resources. In recent years, based on data in SAR glacier movement has become a mainstream technology. Based on the extracted ice velocities including SAR synthetic aperture radar interferometry, the multi-aperture radar interferometry and offset tracking method. The test verification, tracing paper, offset in the SAR intensity tracing method to extract the northeast Qinghai Lake Sahara post satisfied distance along the floor of ice, ice velocities in azimuth. The results showed that the extract from glacial better velocity, the maximum velocity reached 15.36 m • a-1, an axial flow down from both sides, tends to 0 m • a-1 at the end of the tongue; ice azimuth extraction flow rate the maximum velocity of 18.27m • a-1, but ionospheric disturbance, some orientation to the orientation of the fringe to the flow in FIG. Further, since the flow rate of ice and small azimuth component factors, the present study to extract from the flow rate is lower than the orientation accuracy.

Monitoring of changes in glaciers helps to reflect global and regional climate evolution and to protect the natural environment and natural resources. In recent years, the study of glacier movement based on SAR data has become one of the mainstream technologies. The flow rate of the glacier based on SAR mainly includes synthetic aperture radar interferometry, multi-hole radar interference and offset tracking. By experiment and verification, the intensity tracking method in SAR offset tracking is used to extract the velocity of the glacier along the distance and azimuth of the GhannaLou glacier in northeast Of Hala Lake, Qinghai Province. The results show that the velocity velocity extraction effect is good, the maximum flow rate reaches 15.36 m-a-1, the flow rate decreases from the central axis to both sides, tends to 0 m-a-1 at the end of the ice tongue, and the maximum flow rate of the azimuth extracted reaches 18.27 m-a-1, but due to ionospheric interference, There are some azimuth streaks in the azimuth flow chart. In addition, due to the small azimuth components of ice flow, the azimuth flow velocity accuracy extracted in this study is lower than the distance.

Glacier dynamic change monitoring helps to reflect global and regional climate change and protect the natural environment and natural resources. In recent years, research on glacier movement based on SAR data has become one of the mainstream technologies. The extraction of glacier velocity based on SAR mainly includes synthetic aperture radar interferometry, multi aperture radar interferometry and offset tracking. It is verified by experiments that the intensity tracking method of SAR migration tracking method is used to extract the glacier velocity along the distance and direction of Gangnalou glacier in the northeast of Hala lake, Qinghai Province. The results show that the extraction effect of the range direction glacier velocity is better, the maximum velocity reaches 15.36 m · A-1, the velocity decreases from both sides of the central axis, and tends to 0 m · A-1 at the end of the ice tongue; the maximum velocity of the azimuth direction extraction ice velocity reaches 18.27 M · A-1, but there are some directional streaks in the azimuth velocity diagram due to the ionosphere interference. In addition, due to the small component of ice velocity in azimuth and other factors, the accuracy of azimuth velocity extracted in this study is lower than that in distance.<br>