利用高分辨率TSX/TDX交轨干涉测量技术探测渤海浮冰信息

Monitoring the Freeboard of the Drift Ice in the Bohai Sea Using the Cross-InSAR Technique with High-resolution TSX/TDX Data

利用合成孔径雷达交轨干涉测量技术对中国渤海东北部的海上浮冰的海冰冰弦高进行了探测。阐述了交轨雷达干涉测量进行海冰探测的基本原理及数据处理流程,首次利用高分辨率的Terra SAR-X和Tan DEM-X卫星(简称TSX/TDX)交轨干涉数据进行In SAR海上浮冰探测,提出了一种利用交轨干涉相位进行海上浮冰冰舷高(即海冰出水高度)反演的方法,以海水面作为基准面,基于干涉相位获取了海上浮冰的冰舷高,进而基于静力学平衡公式反演了浮冰的厚度信息。通过试验可以得到,在该试验区,海洋浮冰的冰舷高一般在1.01~3.06 cm,平均冰舷高厚度为2.376 cm。试验证明,交轨干涉测量技术是进行海上浮冰厚度反演的一种有效的技术手段。

The cross-track interferometry with high-resolution TSX/TDX data was used to detect the freeboard of the drift ice in the Bohai sea.The principle and data processing of measuring the sea ice using the cross-track In SAR were presented. Then the TSX/TDX cross-track interferometric data with high resolution were used to detect the drift ice in Bohai.A sea ice retrieval algorithm through the use of the phase information from the cross-track In SAR technique.Taking the surface of the sea lead as a reference surface,the sea ice freeboard was retrieved from the interferometric phase.Through the test,we found that the freeboard of drift ice in the Bohai sea range from 1.01 cm to 3.06 cm.And the average thickness was 2.376 cm.The experimental results show that the cross-track In SAR technique with high resolution is an effective means to retrieve the freeboard of the sea ice.