@Article{RodriguesPaulZewd:2017:HiCoBa,
author = "Rodrigues, Fabiano S. and Paula, Eurico Rodrigues de and Zewdie,
Gebreab K.",
affiliation = "{The University of Texas at Dallas} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {The University of Texas at
Dallas}",
title = "High-resolution coherent backscatter interferometric radar images
of equatorial spread F using Capon's method",
journal = "Annales Geophysicae",
year = "2017",
volume = "35",
number = "3",
pages = "393--402",
month = "Mar.",
keywords = "instruments and techniques), ionospheric physics, Radio science
(interferometry.",
abstract = "We present results of Capon's method for estimation of in-beam
images of ionospheric scattering structures observed by a small,
low-power coherent backscatter interferometer. The radar
interferometer operated in the equatorial site of S{\~a}o
Lu{\'{\i}}s, Brazil (2.59°\ĝS, 44.21°\ĝW,
\ĝ'2.35° dip latitude). We show numerical simulations that
evaluate the performance of the Capon method for typical F region
measurement conditions. Numerical simulations show that, despite
the short baselines of the S{\~a}o Lu{\'{\i}}s radar, the Capon
technique is capable of distinguishing localized features with
kilometric scale sizes (in the zonal direction) at F region
heights. Following the simulations, we applied the Capon algorithm
to actual measurements made by the S{\~a}o Lu{\'{\i}}s
interferometer during a typical equatorial spread F (ESF) event.
As indicated by the simulations, the Capon method produced images
that were better resolved than those produced by the Fourier
method. The Capon images show narrow (a few kilometers wide)
scattering channels associated with ESF plumes and scattering
regions spaced by only a few tens of kilometers in the zonal
direction. The images are also capable of resolving bifurcations
and the C shape of scattering structures.",
doi = "10.5194/angeo-35-393-2017",
url = "http://dx.doi.org/10.5194/angeo-35-393-2017",
issn = "0992-7689",
language = "en",
targetfile = "rodrigues_high.pdf",
urlaccessdate = "27 abr. 2024"
}