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Title:	ARBRES: Light-weight CW/FM SAR sensors for small UAVs
Author:	Aguasca Solé, Alberto; Acevo Herrera, René; Broquetas Ibars, Antoni; Mallorquí Franquet, Jordi Joan; Fabregas Canovas, Francisco Javier
Other authors:	Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. RSLAB - Grup de Recerca en Teledetecció
Abstract:	This paper describes a pair of compact CW/FM airborne SAR systems for small UAV-based operation (wingspan of 3.5 m) for low-cost testing of innovative SAR concepts. Two different SAR instruments, using the C and X bands, have been developed in the context of the ARBRES project, each of them achieving a payload weight below 5 Kg and a volume of 13.5 dm3 (sensor and controller). Every system has a dual receiving channel which allows operation in interferometric or polarimetric modes. Planar printed array antennas are used in both sensors for easy system integration and better isolation between transmitter and receiver subsystems. First experimental tests on board a 3.2 m wingspan commercial radio-controlled aircraft are presented. The SAR images of a field close to an urban area have been focused using a back-projection algorithm. Using the dual channel capability, a single pass interferogram and Digital Elevation Model (DEM) has been obtained which agrees with the scene topography. A simple Motion Compensation (MoCo) module, based on the information from an Inertial+GPS unit, has been included to compensate platform motion errors with respect to the nominal straight trajectory.
Abstract:	Peer Reviewed
Subject(s):	-Àrees temàtiques de la UPC::Aeronàutica i espai::Aeronaus::Avions -Àrees temàtiques de la UPC::Aeronàutica i espai::Sistemes CNS/ATM (Communication, Navigation, Surveillance/Air Traffic Management) -Drone aircraft -- Control systems -airborne radar autonomous aerial vehicles CW radar digital elevation models FM radar Global Positioning System inertial navigation microstrip antenna arrays motion compensation planar antenna arrays radar imaging radar interferometry radar receivers radar transmitters remote sensing by radar sensors synthetic aperture radar -Avions no tripulats -- Sistemes de control
Rights:	Attribution-NonCommercial-NoDerivs 3.0 Spain http://creativecommons.org/licenses/by-nc-nd/3.0/es/
Document type:	Article - Published version Article
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