Computer Science – Sound
Scientific paper
Sep 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982natur.299..238n&link_type=abstract
Nature, vol. 299, Sept. 16, 1982, p. 238-240.
Computer Science
Sound
5
Auroral Zones, Backscattering, Ionospheric Sounding, Radar Echoes, Annual Variations, Diurnal Variations, Ionospheric Electron Density
Scientific paper
Recent observations of long discrete auroral radar echoes by the Scandinavian Twin Auroral Radar Experiment (STARE) are reported. The study focuses on latitudes in the range of approximately 5.7-8, and the STARE system provides measurements of the backscatter intensity and irregularity drift velocity over an area of about 200,000 sq km with a spatial resolution of 20 x 20 sq km and a temporal resolution of approximately 20 sec. Echo characteristics, as observed by STARE, are: a series of striations which may persist for one hour or more (the striations are narrow in range, approximately 20-100 km), weak backscatter intensities with a signal-to-noise ratio of a few decibels, irregularity speeds of 0-400 m/sec and motion speeds in the backscattering region of 100-300 m/sec, echo occurrences following periods of intense radar auroral activity, and primarily late-afternoon or early morning occurrences during the winter. For further understanding of this phenomenon, it must be determined whether or not striations correspond to optical emission and ionospheric plasma density regions.
Axford Wiliam Ian
Nielsen Edward
Sofko George
No associations
LandOfFree
STARE observations of long discrete echoes 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 STARE observations of long discrete echoes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and STARE observations of long discrete echoes will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1262286