Estimation of spectral parameters from oblique Equatorial Electrojet echoes using a double skewed Gaussian model at JRO

Descripción del Articulo

Poster presented at the MaSAG23 Summer School and Conference, INGV, Rome, May 15-20, 2023 and 2023 CEDAR Workshop, San Diego, CA, USA, June 25-30.
Detalles Bibliográficos
Autores: Flores, Roberto, Milla, M., Kuyeng, Karim, Hysell, D.L., Chau, J.L.
Formato: objeto de conferencia
Fecha de Publicación:2023
Institución:Instituto Geofísico del Perú
Repositorio:IGP-Institucional
Lenguaje:inglés
OAI Identifier:oai:repositorio.igp.gob.pe:20.500.12816/5440
Enlace del recurso:http://hdl.handle.net/20.500.12816/5440
Nivel de acceso:acceso abierto
Materia:Equatorial electrojet
Doppler shift
Gaussian fitting
https://purl.org/pe-repo/ocde/ford#1.05.01
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dc.title.es_ES.fl_str_mv Estimation of spectral parameters from oblique Equatorial Electrojet echoes using a double skewed Gaussian model at JRO
title Estimation of spectral parameters from oblique Equatorial Electrojet echoes using a double skewed Gaussian model at JRO
spellingShingle Estimation of spectral parameters from oblique Equatorial Electrojet echoes using a double skewed Gaussian model at JRO
Flores, Roberto
Equatorial electrojet
Doppler shift
Gaussian fitting
https://purl.org/pe-repo/ocde/ford#1.05.01
title_short Estimation of spectral parameters from oblique Equatorial Electrojet echoes using a double skewed Gaussian model at JRO
title_full Estimation of spectral parameters from oblique Equatorial Electrojet echoes using a double skewed Gaussian model at JRO
title_fullStr Estimation of spectral parameters from oblique Equatorial Electrojet echoes using a double skewed Gaussian model at JRO
title_full_unstemmed Estimation of spectral parameters from oblique Equatorial Electrojet echoes using a double skewed Gaussian model at JRO
title_sort Estimation of spectral parameters from oblique Equatorial Electrojet echoes using a double skewed Gaussian model at JRO
author Flores, Roberto
author_facet Flores, Roberto
Milla, M.
Kuyeng, Karim
Hysell, D.L.
Chau, J.L.
author_role author
author2 Milla, M.
Kuyeng, Karim
Hysell, D.L.
Chau, J.L.
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Flores, Roberto
Milla, M.
Kuyeng, Karim
Hysell, D.L.
Chau, J.L.
dc.subject.es_ES.fl_str_mv Equatorial electrojet
Doppler shift
Gaussian fitting
topic Equatorial electrojet
Doppler shift
Gaussian fitting
https://purl.org/pe-repo/ocde/ford#1.05.01
dc.subject.ocde.es_ES.fl_str_mv https://purl.org/pe-repo/ocde/ford#1.05.01
description Poster presented at the MaSAG23 Summer School and Conference, INGV, Rome, May 15-20, 2023 and 2023 CEDAR Workshop, San Diego, CA, USA, June 25-30.
publishDate 2023
dc.date.accessioned.none.fl_str_mv 2023-08-11T16:33:58Z
dc.date.available.none.fl_str_mv 2023-08-11T16:33:58Z
dc.date.issued.fl_str_mv 2023
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dc.identifier.uri.none.fl_str_mv http://hdl.handle.net/20.500.12816/5440
url http://hdl.handle.net/20.500.12816/5440
dc.language.iso.es_ES.fl_str_mv eng
language eng
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eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/4.0/
dc.format.es_ES.fl_str_mv application/pdf
dc.publisher.es_ES.fl_str_mv 2023 CEDAR Workshop
dc.source.none.fl_str_mv reponame:IGP-Institucional
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instname_str Instituto Geofísico del Perú
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spelling Flores, RobertoMilla, M.Kuyeng, KarimHysell, D.L.Chau, J.L.2023-08-11T16:33:58Z2023-08-11T16:33:58Z2023http://hdl.handle.net/20.500.12816/5440Poster presented at the MaSAG23 Summer School and Conference, INGV, Rome, May 15-20, 2023 and 2023 CEDAR Workshop, San Diego, CA, USA, June 25-30.Coherent echoes from the equatorial electrojet (EEJ) region are detected at the Jicamarca Radio Observatory (JRO) by using an array of 16 Yagi antennas with a main beam pointed obliquely to the west with an elevation of about 35 deg. The spectrum of these observations are composed of two types of EEJ echoes (Type I and Type II)[1] from which we can estimate their main spectral parameters such as Doppler shift and spectral width independently for each type. Previously, the method applied to obtain these parameters was a standard fitting approach based on a double Gaussian model. However, in some cases, the shape of the spectral measurements are not symmetric (resembling the shape of a skewed distribution). Based on simulations, we determined that the skewed shape of the oblique EEJ spectrum comes from the fact that the measured spectrum is the result of the sum of spectral contributions coming from different heights, with different Doppler shifts and spectral widths weighted by the antenna beam shape. The overall result is an asymmetric spectrum with a peak that does not coincide with the average Doppler shift. Thus in order to account for this effect, we have implemented a double skewed Gaussian distribution model to fit the oblique EEJ measurements and estimate their spectral parameters. In this work, we present the results obtained in the simulation showing the skewed shape of the spectrum. Based on our simulations, we have also proved that the shift of the skewed Gaussian model can be interpreted as the Doppler shift of the echoes. In addition, some examples of the new fitting procedure are shown in comparison with the classical Gaussian fitting where it can be seen the better agreement between the data and the double skewed Gaussian model.application/pdfeng2023 CEDAR Workshopinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/4.0/Equatorial electrojetDoppler shiftGaussian fittinghttps://purl.org/pe-repo/ocde/ford#1.05.01Estimation of spectral parameters from oblique Equatorial Electrojet echoes using a double skewed Gaussian model at JROinfo:eu-repo/semantics/conferenceObjectreponame:IGP-Institucionalinstname:Instituto Geofísico del Perúinstacron:IGPORIGINALPoster_Flores_et_al_2023_CEDAR_Workshop.pdfPoster_Flores_et_al_2023_CEDAR_Workshop.pdfapplication/pdf4122690https://repositorio.igp.gob.pe/bitstreams/85113199-ce1a-4d0e-b064-f403d23a2ac6/downloadae20cd7b20b1aec22a0074650f2d1d8cMD51Poster_Flores_et_al_2023_MaSAG23.pdfPoster_Flores_et_al_2023_MaSAG23.pdfapplication/pdf3896380https://repositorio.igp.gob.pe/bitstreams/f1214189-7f42-4ee3-86df-ac29371f381d/downloadf5c4e1cccc79faa37b34e51b3c9f1603MD55LICENSElicense.txtlicense.txttext/plain; charset=utf-81748https://repositorio.igp.gob.pe/bitstreams/733de480-a6c9-48c0-b10e-1af80fbebba6/download8a4605be74aa9ea9d79846c1fba20a33MD52TEXTPoster_Flores_et_al_2023_CEDAR_Workshop.pdf.txtPoster_Flores_et_al_2023_CEDAR_Workshop.pdf.txtExtracted texttext/plain6314https://repositorio.igp.gob.pe/bitstreams/a780417f-2c3b-4f27-badc-02cec1c90c08/downloadc12e60977edcf5a0a146e61f9e682b35MD53Poster_Flores_et_al_2023_MaSAG23.pdf.txtPoster_Flores_et_al_2023_MaSAG23.pdf.txtExtracted texttext/plain6211https://repositorio.igp.gob.pe/bitstreams/48e3b32c-445d-44e8-96b8-a21d84f9f5c8/download6a47ae395526911c825864979f4dd675MD56THUMBNAILPoster_Flores_et_al_2023_CEDAR_Workshop.pdf.jpgPoster_Flores_et_al_2023_CEDAR_Workshop.pdf.jpgIM Thumbnailimage/jpeg145561https://repositorio.igp.gob.pe/bitstreams/64e6898a-c475-4778-80a8-b5dabd1e2459/download97f85e003386ac9493fe16ceabb10e5fMD54Poster_Flores_et_al_2023_MaSAG23.pdf.jpgPoster_Flores_et_al_2023_MaSAG23.pdf.jpgIM Thumbnailimage/jpeg117702https://repositorio.igp.gob.pe/bitstreams/c2a54459-256b-4a10-bc81-f7d7b628146b/download1f09a1721e5c746b34f1afe2b212eb49MD5720.500.12816/5440oai:repositorio.igp.gob.pe:20.500.12816/54402023-08-23 15:27:13.089https://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessopen.accesshttps://repositorio.igp.gob.peRepositorio Geofísico del Perudspace-help@myu.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Estimation of spectral parameters from oblique Equatorial Electrojet echoes using a double skewed Gaussian model at JRO
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