Physics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm21a1680n&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #SM21A-1680
Physics
7867 Wave/Particle Interactions (2483, 6984)
Scientific paper
Pc 1 geomagnetic pulsations propagate from the high-latitude source region to middle latitudes in the ionosphere. The high-latitude source region links to the magnetosphere where ion cyclotron instability occurs around the plasmapause. Since Pc 1 pulsation observed by ground magnetometers at middle latitudes can be a mixture of waves from several high-latitude source regions, the polarization analysis of Pc 1 pulsations enables us to understand the spatial structure and time variations of the high-latitude source region. In order to investigate spectral and propagation characteristics of the Pc 1 at mid-latitudes, we have installed three induction magnetometers at Paratunka (PTK, 53.0N, 158.2E, magnetic latitude (MLAT): 45.8N), Moshiri (MSR, 44.4N, 142.3E, MLAT: 35.7N) and Sata (STA, 31.0N, 130.7E, MLAT: 22.0N). The observations with a 64-Hz sample recording have been started on July 5, 2007, at MSR, on August 21, 2007, at PTK, and on September 5, 2007, at STA and will be started at Magadan (MGD, 59.7N, 151.0E, MLAT: 50.6N) on November 2008. Polarization analysis with these multi-point data indicates that the Pc 1 polarization directions on November 11, 2007 depend on frequency with a difference of ~30 degree. For December 17, 2007 event, the polarization angle varies in time for ~30 deg/hour. These facts may indicate either the structure and motion of the high-latitude Pc 1 source region or the effects of the duct propagations in the inhomogeneous ionosphere. In this presentation, we also show the statistical results of these polarization analyses using 1-year data of middle latitude Pc 1 observations.
Nomura Ryo
Shevtsov B. M.
Shiokawa Kazuhiko
No associations
LandOfFree
Polarization analysis of Pc 1 geomagnetic pulsations at multi-point ground observations at middle latitudes 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 Polarization analysis of Pc 1 geomagnetic pulsations at multi-point ground observations at middle latitudes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polarization analysis of Pc 1 geomagnetic pulsations at multi-point ground observations at middle latitudes will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1094395