Mapping irregularities in the postsunset equatorial ionosphere with an expanded network of HF beacons

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dc.contributor.authorHysell, D. L.
dc.contributor.authorRojas, E.
dc.contributor.authorGoldberg, H.
dc.contributor.authorMilla, Marco
dc.contributor.authorKuyeng, K.
dc.contributor.authorValdez, A.
dc.contributor.authorMorton, Y. T.
dc.contributor.authorBourne, H.
dc.date.accessioned2022-02-25T11:26:43Z
dc.date.available2022-02-25T11:26:43Z
dc.date.issued2021-07
dc.description.abstractData from a network of high-frequency (HF) beacons deployed in Peru are used to estimate the regional ionospheric electron density in a volume. Pseudorange, accumulated carrier phase, and signal power measurements for each of the 36 ray paths provided by the network at a 1 min cadence are incorporated in the estimates. Additional data from the Jicamarca incoherent scatter radar, the Jicamarca sounder, and GPS receivers can also be incorporated. The electron density model is estimated as the solution to a global optimization problem that uses ray tracing in the forward model. The electron density is parametrized in terms of B-splines in the horizontal direction and generalized Chapman functions or related functions in the vertical. Variational sensitivity analysis has been added to the method to allow for the utilization of the signal power observable which gives additional information about the morphology of the bottomside F region as well as absorption including absorption in the D and E regions. The goal of the effort is to provide contextual information for improving numerical forecasts of plasma interchange instabilities in the postsunset F region ionosphere associated with equatorial spread F (ESF). Data from two ESF campaigns are presented. In one experiment, the HF data revealed the presence of a large-scale bottomside deformation that seems to have led to instability under otherwise inauspicious conditions. In another experiment, gradual variations in HF signal power were found to be related to the varying shape of the bottomside F layer.es_ES
dc.description.peer-reviewPor pareses_ES
dc.formatapplication/pdfes_ES
dc.identifier.citationHysell, D. L., Rojas, E., Goldberg, H., Milla, M. A., Kuyeng, K., Valdez, A., … Bourne, H. (2021). Mapping irregularities in the postsunset equatorial ionosphere with an expanded network of HF beacons.==$Journal of Geophysical Research: Space Physics, 126$==(7), e2021JA029229. https://doi.org/10.1029/2021JA029229es_ES
dc.identifier.doihttps://doi.org/10.1029/2021JA029229es_ES
dc.identifier.govdocindex-oti2018
dc.identifier.journalJournal of Geophysical Research: Space Physicses_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/5123
dc.language.isoenges_ES
dc.publisherAmerican Geophysical Uniones_ES
dc.relation.ispartofurn:issn:2169-9402
dc.rightsinfo:eu-repo/semantics/closedAccesses_ES
dc.subjectBeacones_ES
dc.subjectElectron densityes_ES
dc.subjectEquatorial ionospherees_ES
dc.subjectHFes_ES
dc.subjectInverse methodses_ES
dc.subject.ocdehttps://purl.org/pe-repo/ocde/ford#1.05.01es_ES
dc.titleMapping irregularities in the postsunset equatorial ionosphere with an expanded network of HF beaconses_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

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