DOM and DSM generation using airborne dual-antenna millimeter-wave InSAR in high mountain area of Sichuan

doi:10.13474/j.cnki.11-2246.2020.0314

Abstract

Abstract: The airborne dual-antenna millimeter-wave InSAR system is able to acquire DSM over difficult mountainous areas with steep or complicated topography efficiently and accurately for its flexible maneuverability, variable track, high coherence, high resolution, real-time acquisition, et al, which is one of the significant means for obtaining DSM. However, due to the large amount of airborne InSAR data, the current data processing capability and efficiency are relatively low. In response to these problems, the GPU parallel processing technology is adopted in this paper to carry out interference processing quickly and accurately, thus improving the efficiency of batch interference processing. The phase unwrapping is performed quickly based on the minimum balanced trees unwrapping algorithm. The SIFT algorithm is used to extract the tie points between adjacent images in the strip automatically and quickly, which improves the accuracy and efficiency of tie points selection.In this paper, 13 scenes of airborne InSAR data in the high mountainous area of Qionglai city, Sichuan province are taken as examples for analysis. The RMSE of the generated DOM and DSM in the three directions of X, Y and H are 1.839, 1.464 and 1.997 m respectively, which satisfies requirements of 1：5000 topographic mapping.

Key words: airborne InSAR, millimeter-wave, mountain area, DOM, DSM

CLC Number:

P237

LI Yongjie, SUN Zhongchang, WEI Lideng, GAO Jian, YANG Honglei. DOM and DSM generation using airborne dual-antenna millimeter-wave InSAR in high mountain area of Sichuan[J]. Bulletin of Surveying and Mapping, 2020, 0(10): 31-37.

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