Physics
Scientific paper
Jul 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3114805u&link_type=abstract
Geophysical Research Letters, Volume 31, Issue 14, CiteID L14805
Physics
3
Ionosphere: Ionospheric Irregularities, Ionosphere: Midlatitude Ionosphere, Ionosphere: Plasma Waves And Instabilities, Ionosphere: Wave Propagation (6934)
Scientific paper
Arecibo ISR observations and VHF coherent backscatter data collected with a radar situated in southern Puerto Rico are examined to understand the causes of quasi-periodic variations in VHF returns from lower E-region heights (~93 km). It is found that Bragg scale density irregularities causing the observed VHF backscatter are formed and propagated horizontally in a density perturbation field localized at the upper boundary of a tidal ion layer. The density perturbation has a 7 km horizontal wavelength, propagates in southwest direction, and it is not aligned with the geomagnetic field. Thus the production mechanism of the observed density perturbation cannot be the gradient-drift instability often invoked to account for the generation of mid-latitude sporadic E radar echoes. Nevertheless, secondary gradient-drift instability operating on the gradients of the southwest propagating perturbation remains the most likely cause of Bragg scale electron density waves responsible for the VHF returns.
Franke Steven J.
Kudeki Erhan
Urbina Julio
Zhou Qihou
No associations
LandOfFree
Analysis of a mid-latitude E-region LQP event observed during the Coqui 2 Campaign does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Analysis of a mid-latitude E-region LQP event observed during the Coqui 2 Campaign, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Analysis of a mid-latitude E-region LQP event observed during the Coqui 2 Campaign will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1010899