Mostrar el registro sencillo del ítem Oppenheim, Meers M. Dimant, Yakov S. 2018-11-20T12:29:49Z 2018-11-20T12:29:49Z 2016-04-27
dc.identifier.issn 1944-8007
dc.description.abstract "VHF radars near the geomagnetic equator receive coherent reflections from plasma density irregularities between 130 and 160 km in altitude during the daytime. Though researchers first discovered these 150 km echoes over 50 years ago and use them to monitor vertical plasma drifts, the underlying mechanism that creates them remains a mystery. This paper uses large‐scale kinetic simulations to show that photoelectrons can drive electron waves, which then enhance ion density irregularities that radars could observe as 150 km echoes. This model explains why 150 km echoes exist only during the day and why they appear at their lowest altitudes near noon. It predicts the spectral structure observed by Chau (2004) and suggests observations that can further evaluate this mechanism. It also shows the types and strength of electron modes that photoelectron‐wave interactions generate in a magnetized plasma". es_ES
dc.format application/pdf es_ES
dc.language.iso eng es_ES
dc.publisher Geophysical Research Letters es_ES
dc.rights info:eu-repo/semantics/restrictedAccess es_ES
dc.rights.uri es_ES
dc.source Repositorio institucional - IGP es_ES
dc.subject Densidad del plasma es_ES
dc.subject Ecos es_ES
dc.subject Radar--Observaciones es_ES
dc.subject Radar--Mediciones es_ES
dc.subject Electrones es_ES
dc.subject Plasma (Gases ionizados) es_ES
dc.subject Radio Observatorio de Jicamarca es_ES
dc.title Photoelectron‐induced waves: A likely source of 150 km radar echoes and enhanced electron modes es_ES
dc.type info:eu-repo/semantics/article es_ES
dc.subject.ocde Radiofrecuencias es_ES
dc.subject.ocde Radar es_ES
dc.subject.ocde Observación es_ES
dc.subject.ocde Medición es_ES
dc.subject.ocde Geofísica es_ES
dc.identifier.journal Geophysical Research Letters es_ES
dc.description.peer-review Por pares es_ES
dc.identifier.doi 10.1002/2016GL068179 es_ES




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