期刊
REMOTE SENSING
卷 12, 期 20, 页码 -出版社
MDPI
DOI: 10.3390/rs12203463
关键词
radar imaging; unmanned aerial vehicle; inverse scattering; linear scattering models; global positioning systems; carrier based differential global positioning system; radar signal processing; motion compensation
类别
资金
- CAMPANIA FESR Operational Program 2014-2020, under the VESTA project Valorizzazione E Salvaguardia del paTrimonio culturAle attraverso l'utilizzo di tecnologie innovative (Enhancement and Preservation of the Cultural Heritage through the use of innovativ [CUP B83D18000320007]
The present manuscript faces the problem of performing high-resolution Unmanned Aerial Vehicle (UAV) radar imaging in sounder modality, i.e., into the vertical plane defined by the along-tack and the nadir directions. Data are collected by means of a light and compact UAV radar prototype; flight trajectory information is provided by two positioning estimation techniques: standalone Global Positioning System (GPS) and Carrier based Differential Global Positioning System (CDGPS). The radar imaging is formulated as a linear inverse scattering problem and a motion compensation (MoCo) procedure, accounting for GPS or CDGPS positioning, is adopted. The implementation of the imaging scheme, which is based on the Truncated Singular Value Decomposition, is made efficient by the Shift and Zoom approach. Two independent flight tests involving different kind of targets are considered to test the imaging strategy. The results show that the CDGPS supports suitable imaging performance in all the considered test cases. On the other hand, satisfactory performance is also possible by using standalone GPS when the meter-level positioning error exhibits small variations during the radar integration time.
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