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Lotfi Achiri


Postgraduate Research Student

Academic and research departments

Surrey Space Centre.

My research project

My publications

Publications

Lotfi Achiri, Raffaella Guida, Pasquale Iervolino (2018)Collaborative use of SAR and AIS data from NovaSAR-S for Maritime Surveillance, In: Proceedings of the 12th European Conference on Synthetic Aperture Radar (EUSAR 2018), Aachen, Germany EUSAR

This paper provides a novel approach for the fusion of Synthetic Aperture Radar (SAR) images and Automatic Identification System (AIS) data for the tracking of vessels over sea areas. At this aim, SAR and AIS data are simulated and optimized for the upcoming NovaSAR-S maritime and stripmap modes. These simulated data are used to test the proposed tracking methodology in real time scenario. The results also give practical guidelines on how to task NovaSAR-S to cover uncooperative vessels over the revisit time of the satellite considering the Doppler shift due to the radial velocity of the target.

Lotfi Achiri, Raffaella Guida, Pasquale Iervolino (2018)SAR and AIS Fusion for Maritime Surveillance, In: Proceedings of the 4th International Forum on Research and Technologies for Society and Industry Institute of Electrical and Electronics Engineers (IEEE)

This paper presents a novel approach to fuse Synthetic Aperture Radar (SAR) images and Automatic Identification System (AIS) data for maritime surveillance. The procedure consists of four steps. First, ship detection is performed in the SAR image using a Constant False Alarm Rate (CFAR) algorithm; then feature extraction (ship position, heading and size) is performed on ships detected in the SAR image, the third step consists in identifying the detected ships and extracting the same features from the AIS data. The final step is to feed the fusion block with both features vectors extracted separately from the SAR and AIS. Here the arithmetic mean function is established. The algorithm is tested using simulated SAR images and AIS data. Preliminary results of the fusion of SAR and AIS data are presented and discussed.