@article{272edb55d7774db8a35c26ee1889810a,
title = "A Study of Post-Sunset Spread-F Initiation During the 2013 EVEX Campaign",
abstract = "Equatorial Vortex Experiment (EVEX), the EVEX mission of May 2013, carried out from Roi-Namur, Kwajalein Atoll, explored the initiation physics of equatorial spread-F with a pair of rockets launched simultaneously during local sunset to apogees of 182 and 331 km, respectively. EVEX measurements presented in this paper establish the existence of a differential zonal flow between plasma and neutrals at bottom-side F-region heights during the sunset time in support of a post-sunset spread-F initiation mechanism described in Kudeki et al. (2007) that is characterized by large growth rates for oblique-propagating 10's-of-km-scale electron density perturbations. F-region plasma drifts were measured in situ using an electric field double-probe instrument while neutral winds were measured by triangulating drifting vapor clouds. The state of the ionosphere and spread-F irregularities were monitored by ground based ARPA Long-Range Tracking and Instrumentation Radar and Illinois Radar Interferometer System radars using incoherent and coherent scatter techniques, respectively, as well as an ionosonde.",
author = "Erhan Kudeki and Pablo Reyes and Aaron Wallace and Bingqian Ye and Pfaff, {Robert F.} and Larsen, {Miguel F.} and Groves, {Keith M.}",
note = "Funding Information: E. K. thanks the technicians and engineers at ALTAIR who helped with the collection of the incoherent scatter radar measurments during the EVEX project, as well as Ying Ou and Chang Yue for the initial development (during their Senior Thesis projects in ECE Illinois) of the plasma drift estimation method from the ALTAIR uncoded long pulse data. This research in ECE Illinois was supported by NASA grant NNX10AL94G. MFL was partially supported by NASA grant NNX10AL26G and NSF grant AGS-2012994. Funding Information: E. K. thanks the technicians and engineers at ALTAIR who helped with the collection of the incoherent scatter radar measurments during the EVEX project, as well as Ying Ou and Chang Yue for the initial development (during their Senior Thesis projects in ECE Illinois) of the plasma drift estimation method from the ALTAIR uncoded long pulse data. This research in ECE Illinois was supported by NASA grant NNX10AL94G. MFL was partially supported by NASA grant NNX10AL26G and NSF grant AGS‐2012994. Publisher Copyright: {\textcopyright} 2022. The Authors.",
year = "2022",
month = may,
doi = "10.1029/2021JA030256",
language = "English (US)",
volume = "127",
journal = "Journal of Geophysical Research: Space Physics",
issn = "2169-9380",
publisher = "Wiley-Blackwell",
number = "5",
}