Nighttime medium-scale traveling ionospheric disturbances propagating northward observed by the SuperDARN Hokkaido HF radar and GEONET

Details Nighttime medium-scale traveling ionospheric disturbances propagating northward observed by the SuperDARN Hokkaido HF radar and GEONET Nighttime medium-scale traveling ionospheric disturbances propagating northward observed by the SuperDARN Hokkaido HF radar and GEONET

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsa13a1473i&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SA13A-1473

Other

[2435] Ionosphere / Ionospheric Disturbances, [2443] Ionosphere / Midlatitude Ionosphere

Scientific paper

Medium-Scale Traveling Ionospheric Disturbance (MSTID) has wavelike structure in the ionosphere, with horizontal wavelength of 100 - 1000 km and period less than 60 minutes. In the past, MSTIDs propagating over Japan have been analyzed with GEONET (GPS Earth Observation Network System) and all-sky airglow imagers. In this study, we use SuperDARN Hokkaido HF radar which started operation in November, 2006. The Hokkaido radar is a useful tool for studying MSTIDs between the northern edge of Japan and Kamchatka. By combining radar data with GEONET-TEC data, we can obtain new knowledge of MSTIDs over and to the north of Japan. Kotake [2007] made statistical analysis of MSTID over Japan in 2002, which shows that nighttime MSTIDs over Japan mainly propagate southwestward. On the other hand, the Hokkaido radar observed several nighttime MSTIDs propagating northward. Nighttime MSTIDs propagating northward observed by the Hokkaido radar might have different characteristics from MSTIDs over Japan. To confirm this, we performed statistical analysis of nighttime MSTIDs (8 - 22UT) propagating northward and examined seasonal and local time dependence of occurrence characteristics. We found that these MSTIDs have relatively high occurrence rate after sunset in May and August. A closer look at the statistical analysis of MSTIDs over Japan with GEONET-TEC data during 2002 [Kotake, 2007] also showed similar, although not exactly the same, occurrence characteristics of MSTIDs propagating northward. Furthermore, we used the dataset of simultaneous observation by the Hokkaido radar and GEONET to examine whether nighttime MSTIDs propagating northward were observed by the Hokkaido radar and GEONET simultaneously. The results show that propagation direction of MSTIDs observed by the Hokkaido radar do not necessarily coincide with that observed by the GEONET. From this, it is considered that the HF radar may be observing MSTID that is beyond the field of view of the GEONET. It is likely that we have new knowledge of MSTIDs propagating northward using the Hokkaido radar, whose field of view was not covered by the GEONET. The result of statistical analysis and, event studies of northward-propagating MSTIDs, together with the discussion of their characteristics will be presented.

Affiliated with

Also associated with

No associations

Rating

Nighttime medium-scale traveling ionospheric disturbances propagating northward observed by the SuperDARN Hokkaido HF radar and GEONET 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 Nighttime medium-scale traveling ionospheric disturbances propagating northward observed by the SuperDARN Hokkaido HF radar and GEONET, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nighttime medium-scale traveling ionospheric disturbances propagating northward observed by the SuperDARN Hokkaido HF radar and GEONET will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1777748