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

Simple item page
dc.contributor.authorFlores, Roberto
dc.contributor.authorMilla, M.
dc.contributor.authorKuyeng, Karim
dc.contributor.authorHysell, D.L.
dc.contributor.authorChau, J.L.
dc.date.accessioned2023-08-11T16:33:58Z
dc.date.available2023-08-11T16:33:58Z
dc.date.issued2023
dc.descriptionPoster 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.
dc.description.abstractCoherent 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.es_ES
dc.formatapplication/pdfes_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/5440
dc.language.isoenges_ES
dc.publisher2023 CEDAR Workshopes_ES
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/es_ES
dc.subjectEquatorial electrojetes_ES
dc.subjectDoppler shiftes_ES
dc.subjectGaussian fittinges_ES
dc.subject.ocdehttps://purl.org/pe-repo/ocde/ford#1.05.01es_ES
dc.titleEstimation of spectral parameters from oblique Equatorial Electrojet echoes using a double skewed Gaussian model at JROes_ES
dc.typeinfo:eu-repo/semantics/conferenceObjectes_ES

Files

Original bundle
Now showing 1 - 2 of 2
Thumbnail Image
Name:
Poster_Flores_et_al_2023_CEDAR_Workshop.pdf
Size:
3.93 MB
Format:
Adobe Portable Document Format
Description:
Download
Thumbnail Image
Name:
Poster_Flores_et_al_2023_MaSAG23.pdf
Size:
3.72 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Pósters