Huang Pingping

MIMO-SAR imaging technology for helicopter-borne based on ARC antenna array

The helicopter has wide application foreground in disaster relief owing to its good maneuverability. This paper firstly presents basic principle of MIMO-SAR based on arc antenna array and system configuration in details, establishes the corresponding imaging model and provides a particular antenna configuration of arc antenna array installed on helicopter. Then the responding system resolution theory, sampling criteria and performance parameter of the imaging mode are analyzed and a novel imaging algorithm is developed combined with arc aperture configuration. Finally, during platform takeoff and landing, high resolution image acquisition abilities are demonstrated by numerical simulations. On this basis, a ground based experimental system is constructed, also the feasibility and validity of the proposed mode is demonstrated by mean of experimental data acquisition and processing.

Imaging algorithm study on ARC antenna array ground-based SAR

Ground-based SAR has become an important remote sensing technology means for deformation monitoring in recent years. However, in order to achieve higher efficiency data acquisition and wider observation, arc antenna array technology is applied to ground-based SAR. In this paper, a polar format imaging algorithm for arc antenna array ground-based SAR is proposed. Firstly, a brief background on ground-based SAR and arc antenna array are provided. Then, the signal model and imaging algorithm of arc antenna array ground based-SAR are introduced. Finally, simulation result is presented.

Ground-based SAR multistage mountain slope interferometric phase unwrapping

Phase unwrapping is an important part in the process of InSAR signal processing. When ground-based SAR is used for multistage mountain slope deformation monitoring, the mountain slopes are always separated by slope ladders. So the interferometric phase of every slope must be unwrapped by path-following methods respectively. In view of the multistage slope phase unwrapping, this paper proposed a mask branch-cut segmentation phase unwrapping algorithm through improving on the Goldsteins mask branch-cut algorithm. Then a deformation monitoring experiment for multistage mountain slope was carried out, which is to verify the validity and feasibility of the unwrapping algorithm.