Simultaneous radar observations of the electrojet plasma irregularities at 18 and 54.95 MHz over Trivandrum, India

Details Simultaneous radar observations of the electrojet plasma irregularities at 18 and 54.95 MHz over Trivandrum, India Simultaneous radar observations of the electrojet plasma irregularities at 18 and 54.95 MHz over Trivandrum, India

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003jgra..108.1368t&link_type=abstract

Journal of Geophysical Research, Volume 108, Issue A10, pp. SIA 3-1, CiteID 1368, DOI 10.1029/2002JA009698

Statistics

1

Ionosphere: Current Systems (2708), Ionosphere: Electric Fields (2712), Ionosphere: Equatorial Ionosphere, Ionosphere: Ionospheric Irregularities, Ionosphere: Plasma Waves And Instabilities

Scientific paper

Observations of equatorial electrojet (EEJ) plasma irregularities made using a newly established 18 MHz coherent backscatter radar at Trivandrum are presented. Also presented are the simultaneous observations of the electrojet plasma irregularities made using a collocated 54.95 MHz radar. These correspond to 8.3 m and 2.7 m scale irregularities, respectively. The statistics of spectral parameters observed at the two scale sizes are also presented and compared in detail. An interesting and new aspect of these observations is that the 8.3 m irregularities have significant anisotropy in the plane perpendicular to magnetic field in contrast to that reported for 3 m irregularities. While type-1 and type-2 spectra could be distinctly observed at 2.7 m, it is rather difficult to distinguish at 8.3 m. The type-2 velocities for the two scale sizes are pretty close to each other below 102 km, but the velocities for 8.3 m are less than that of 2.7 m above. Type-1 velocities are quite close to each other only at altitudes of the peak electrojet when clear type-1 echoes are observed. Spectral widths are remarkably different at the two scale sizes. The ratio of spectral width corresponding to 2.7 m to that at 8.3 m is close to 1.4, quite similar to that reported earlier from Jicamarca. The observed difference in the velocities and spectral width at the two scale sizes are attributed to the effects of anomalous collision of electrons caused by the large-scale turbulence present in the EEJ. The above observations are found to be consistent with the EEJ instability theories and related simulation works.

Affiliated with

Also associated with

No associations

Rating

Simultaneous radar observations of the electrojet plasma irregularities at 18 and 54.95 MHz over Trivandrum, India 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 Simultaneous radar observations of the electrojet plasma irregularities at 18 and 54.95 MHz over Trivandrum, India, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Simultaneous radar observations of the electrojet plasma irregularities at 18 and 54.95 MHz over Trivandrum, India will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1032722