Small UAV-based SAR system using low-cost radar, position, and attitude sensors with onboard imaging capability
| Autor: | Jan Svedin, Eric Claar, A. Gustafsson, Anders Bernland, John Luong |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Synthetic aperture radar
010504 meteorology & atmospheric sciences Computer science 010401 analytical chemistry 01 natural sciences 0104 chemical sciences law.invention Data link law Inertial measurement unit GNSS applications Position (vector) Range (aeronautics) Electrical and Electronic Engineering Radar Antenna (radio) 0105 earth and related environmental sciences Remote sensing |
| Zdroj: | International Journal of Microwave and Wireless Technologies. 13:602-613 |
| ISSN: | 1759-0795 1759-0787 |
| Popis: | This paper describes a small unmanned aerial vehicle (UAV)-based synthetic aperture radar (SAR) system using low-cost radar (5–6 GHz), position (GNSS/RTK) and attitude (IMU) sensors for the generation of high-resolution images. Measurements using straight as well as highly curved flight trajectories and varying flight speeds are presented, showing range and cross-range lobe-widths close to the theoretical limits. An analysis of the improvements obtained by the use of attitude angles (roll, pitch, and yaw), to correct for the relative offsets in antenna positions as the UAV moves, is included. A capability to generate SAR images onboard with the back-projection algorithm has been implemented using a GPU accelerated single-board computer. Generated images are transmitted to ground using a Wi-Fi data link. |
| Databáze: | OpenAIRE |
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