A study on meteor head echo using a probabilistic detection model at Jicamarca

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dc.contributor.authorLi, Yanlin
dc.contributor.authorZhou, Qihou
dc.contributor.authorScott, Mark
dc.contributor.authorMilla, Marco
dc.coverage.spatialJicamarca
dc.date.accessioned2021-02-16T11:02:29Z
dc.date.available2021-02-16T11:02:29Z
dc.date.issued2020-01
dc.description.abstractA coded long pulse is applied to the Jicamarca 50 MHz high power large aperture radar to study meteor head echoes. We develop a probabilistic detection model, which finds 25% more meteors than the commonly used signal‐to‐noise threshold method. The long code and the probabilistic approach allow us to detect over 180 meteors per minute during the dawn hours, which is several times higher than reported previously. The typical mass of the meteoroids is estimated to be about 10−9 kg, slightly smaller than other sensitive very‐high‐frequency and ultrahigh‐frequency high power large aperture radars except the Arecibo radar. The high sensitivity allows us to observe numerous meteors in the presence of the strongest equatorial electrojet. We report and discuss the characteristics of meteor flux rate, ablation height, and velocity with a constant noise power for the first time for the Jicamarca radar. The highest average detection height is found to be near 2 a.m., instead of near 6 a.m. when the largest average velocity is observed. This is likely due to the combination of the relative large atmospheric velocity and the substantial atmospheric entry angles around 2 a.m. The observed characteristics suggest that many meteors are detected 8° off zenith despite that the full beam width is only 2.4°.es_ES
dc.description.peer-reviewPor pareses_ES
dc.formatapplication/pdfes_ES
dc.identifier.citationLi, Y., Zhou, Q., Scott, M. & Milla, M. (2020). A study on meteor head echo using a probabilistic detection model at Jicamarca.==$Journal of Geophysical Research: Space Physics, 125$==(1). https://doi.org/10.1029/2019JA027459es_ES
dc.identifier.doihttps://doi.org/10.1029/2019JA027459es_ES
dc.identifier.govdocindex-oti2018
dc.identifier.journalJournal of Geophysical Research: Space Physicses_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/4915
dc.language.isoenges_ES
dc.publisherAmerican Geophysical Uniones_ES
dc.relation.ispartofurn:issn:2169-9380
dc.rightsinfo:eu-repo/semantics/closedAccesses_ES
dc.subjectMeteor detectiones_ES
dc.subjectMeteor sciencees_ES
dc.subjectRadares_ES
dc.subjectMeteoroides_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.01es_ES
dc.titleA study on meteor head echo using a probabilistic detection model at Jicamarcaes_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

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