Mostrar el registro sencillo del ítem Lehmacher, G. A. Kudeki, E. 2018-10-24T12:50:38Z 2018-10-24T12:50:38Z 2003-12-18
dc.identifier.citation Lehmacher, G. A., & Kudeki, E. (2003). Variability of equatorial mesospheric echoes.==$Advances in Space Research, 32$==(5), 747-752. es_ES
dc.identifier.issn 0273-1177
dc.description.abstract "Selected results from recent mesospheric campaigns with the 50-MHz Jicamarca radar in August 1998, December 1999 and January 2000 are reported. The data were acquired with 300 and 450 m range resolution and processed with 1 minute time resolution. The focus of this study is on signal-to-noise ratio and its variability on short and long time scales. System changes such as transmitter power were monitored using the signal level near the tropopause. We found that the daily mesopheric signal and its variability increase with solar activity monitored by the sunspot number. Several short-term enhancements of signal power could be linked to solar x-ray flares. Both observations agree with the basic assumption that high electron densities and strong density gradients enhance the illumination of mesospheric turbulence. Daily recurring and descending layers in August is evidence for strong tidal modulation of the dynamic processes that cause the echoes. The good range and time resolution allows to identify many complex structures within the echo layers, including braids and cat's eyes that may be evidence for dynamical instabilities in the mesosphere". es_ES
dc.format application/pdf es_ES
dc.language.iso eng es_ES
dc.publisher Advances in Space Research 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 Mesósfera es_ES
dc.subject Actividad solar es_ES
dc.subject Turbulencia atmosférica es_ES
dc.subject Ecos es_ES
dc.subject Radar--Observaciones es_ES
dc.title Variability of equatorial mesospheric echoes es_ES
dc.type info:eu-repo/semantics/article es_ES
dc.subject.ocde Atmósfera es_ES
dc.subject.ocde Física es_ES
dc.subject.ocde Radar es_ES
dc.subject.ocde Radiación solar es_ES
dc.subject.ocde Perú es_ES
dc.identifier.journal Advances in Space Research es_ES
dc.description.peer-review Por pares es_ES
dc.identifier.doi 10.1016/S0273-1177(03)00410-1 es_ES




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