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dc.contributor.author Lu, Fei
dc.contributor.author Farley, Donald T.
dc.contributor.author Swartz, Wesley E.
dc.date.accessioned 2018-10-31T12:01:11Z
dc.date.available 2018-10-31T12:01:11Z
dc.date.issued 2008-11-12
dc.identifier.citation Lu, F., Farley, D. T., & Swartz, W. E. (2008). Spread in aspect angles of equatorial E region irregularities.==$Journal of Geophysical Research: Space Physics, 113$==(A11), A11309. https://doi.org/10.1029/2008JA013018 es_ES
dc.identifier.uri http://hdl.handle.net/20.500.12816/3245
dc.description.abstract We revisit and extend the 50 MHz radar aspect angle study made in Peru by Kudeki and Farley in 1985, taking advantage of upgraded facilities at Jicamarca. We discuss here (1) type 1 and 2 echoes from the electrojet region, (2) early evening echoes from somewhat above the electrojet, and (3) daytime “150 km” echoes from the ∼145 to 170 km altitude region. Our electrojet data (1) confirm the earlier results for weak type 2 conditions, namely, that the rms aspect angle θrms decreases from about 0.3° at 99 km to slightly less than 0.2° at 108 km, and (2) provide much more information about the aspect angles of type 1 echoes and the apparent nonlinear interaction between type 1 waves and slower waves. Type 1 waves, with phase velocities near the ion‐acoustic velocity, have θrms decreasing from about 0.15° near 104 km to about 0.10° near 110 km. There is strong evidence that horizontally traveling type 1 waves in the upper midday electrojet, where upward electron density gradients are absent, can sometimes nonlinearly couple to slow, vertically traveling waves with aspect angles sometimes larger than 0.5°. In the early evening we often observe echoes in the 125–135 km region with θrms ≤ 0.05°. During daytime the relatively weak “150 km” echoes have even smaller θrms. At the end of the paper we discuss ideas concerning the nonlinear coupling of the plasma waves. es_ES
dc.format application/pdf es_ES
dc.language.iso eng es_ES
dc.publisher American Geophysical Union es_ES
dc.relation.ispartof urn:issn:2169-9380
dc.rights info:eu-repo/semantics/restrictedAccess es_ES
dc.subject Equatorial es_ES
dc.subject Electrojet es_ES
dc.subject Aspect angles es_ES
dc.title Spread in aspect angles of equatorial E region irregularities es_ES
dc.type info:eu-repo/semantics/article es_ES
dc.subject.ocde http://purl.org/pe-repo/ocde/ford#1.05.01 es_ES
dc.identifier.journal Journal of Geophysical Research: Space Physics es_ES
dc.description.peer-review Por pares es_ES
dc.identifier.doi https://doi.org/10.1029/2008JA013018 es_ES

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