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- Title
Aperture Synthesis Imaging of Ionospheric Irregularities Using Time Diversity MIMO Radar.
- Authors
Hysell, D. L.; Chau, J. L.
- Abstract
Aperture‐synthesis images of ionospheric irregularities in the equatorial electrojet are computed using multiple‐input multiple‐output (MIMO) radar methods at the Jicamarca Radio Observatory. MIMO methods increase the number of distinct interferometry baselines available for imaging (by a factor of essentially three in these experiments) as well as the overall size of the synthetic aperture. The particular method employed here involves time‐division multiplexing or time diversity to distinguish pulses transmitted from different quarters of the Jicamarca array. The method comes at the cost of a large increase in computation time and complexity and a reduced signal‐to‐noise ratio. We discuss the details involved in the signal processing and the trade space involved in image optimization. Key Points: Multiple‐input, multiple output (MIMO) radar imaging method implemented at Jicamarca to observe large‐scale waves in the equatorial electrojetSpecific method involves time division multiplexing or time diversityThe resolution of the images was increased but is limited by motion of scatterers which needs mitigation
- Subjects
EQUATORIAL electrojet; SYNTHETIC apertures; SYNTHETIC aperture radar; MIMO radar; TIME management; TIME complexity; SIGNAL processing; INVERSE synthetic aperture radar
- Publication
Radio Science, 2023, Vol 58, Issue 9, p1
- ISSN
0048-6604
- Publication type
Article
- DOI
10.1029/2023RS007765