DSpace community: 太空科學與科技研究中心

Using the IRI, the MAGIC model, and the co-located ground-based GPS receivers to study ionospheric solar eclipse and storm signatures on July 22, 2009

title: Using the IRI, the MAGIC model, and the co-located ground-based GPS receivers to study ionospheric solar eclipse and storm signatures on July 22, 2009 abstract: 摘要： The longest total solar eclipse in the 21st century occurred in Southeast Asia on 22 July 2009 from 00:55 to 04:15 UT, and was accompanied by a moderate magnetic storm starting at 03:00 UT with a D st reduction of −78 nT at 07:00 UT. In this study, we use the ionospheric reference model IRI, the data assimilation model MAGIC, and ground-based GPS receivers to simulate and examine the ionospheric solar eclipse and geomagnetic storm signatures in Taiwan and Japan. Cross-comparisons between the two model results and observations show that IRI fails to simulate the two signatures while MAGIC partially reproduces the storm features. It is essential to include ground-based GPS measurements to improve the IRI performance. 其他題名： Earth Planet Sp 出版者： Berlin/Heidelberg: Springer Berlin Heidelberg 出版日期： 2012-01-01 出處： Earth, planets, and space, 2012-01, Vol.64 (6), p.513-520 資源來源： Publicly Available Content Database (Proquest) 版權： The Society of Geomagnetism and Earth, Planetary and Space Sciences (SGEPSS); The Seismological Society of Japan; The Volcanological Society of Japan; The Geodetic Society of Japan; The Japanese Society for Planetary Sciences; TERRAPUB. 2012 版權： The Society of Geomagnetism and Earth, Planetary and Space Sciences, The Seismological Society of Japan 2012 識別號： ISSN: 1343-8832 識別號： ISSN: 1880-5981 識別號： EISSN: 1880-5981 識別號： DOI: 10.5047/eps.2011.08.016

Typical comparisons between plasma bubble and blob distributions at different altitudes over the Indian sector using a unique combination of satellite-based observations – a case study

title: Typical comparisons between plasma bubble and blob distributions at different altitudes over the Indian sector using a unique combination of satellite-based observations – a case study abstract: 摘要： We report in this article, for the first time, on the altitudinal variations of ionospheric irregularities during post-sunset hours between 14 and 17 October 2001 at Indian longitudes by using a unique combination of Challenging Mini Satellite Payload (CHAMP), Republic of China Satellite (ROCSAT-1), and Defense Meteorological Satellite Programme (DMSP) satellites located at about 400, 650, and 850 km, respectively. It became possible for us to study the width of plasma bubbles and plasma blobs in the longitudinal (zonal) direction at different altitudes along with temporal variations of ion velocity components in horizontal (V y ) and vertical (V z ) directions as probed by ROCSAT-1 and DMSP satellites. The dominant features noticed in V y and V z components are their anti-correlation relationship at the ROCSAT-1 satellite's altitude (mirroring effect). The most important observation from this study is that plasma bubbles are found to have occurred immediately after post-sunset hours, whereas plasma blobs were observed after three hours following the bubbles' appearance time and continued until pre-sunrise hours at higher altitudes between around ±5° and ±20° from the magnetic equator, which indicate that the plasma blobs emanate from plasma bubbles that generated at the bottomside of the ionospheric F-layer shortly after sunset on similar lines to a few recent research studies. It is therefore believed that the polarized electric fields generated inside plasma bubbles might have played a role in the generation of higher-altitude plasma blobs. Importantly, the calculated power spectra of bubbles and blobs show a nearly equal trend, indicating that they are intricately connected with each other. 出版者： Abingdon: Taylor & Francis 出版日期： 2014-08-18 出處： International journal of remote sensing, 2014-08, Vol.35 (16), p.6173-6189 版權： 2014 Taylor & Francis 2014 版權： 2015 INIST-CNRS 識別號： ISSN: 0143-1161 識別號： ISSN: 1366-5901 識別號： EISSN: 1366-5901 識別號： DOI: 10.1080/01431161.2014.950765 識別號： CODEN: IJSEDK

Topside ionospheric electron temperature and density along the Weddell Sea latitude

title: Topside ionospheric electron temperature and density along the Weddell Sea latitude abstract: 出版者： American Geophysical Union (AGU) 出版日期： 2015-01-01 出處： Journal of Geophysical Research: Space Physics, 2015-01, Vol.120, p.609-614 資源來源： Wiley Online Library - AutoHoldings Journals 識別號： ISSN: 2169-9380 識別號： EISSN: 2169-9402 識別號： DOI: 10.1002/2014ja020227

Three-dimensional electron density along the WSA and MSNA latitudes probed by FORMOSAT-3/COSMIC Coupling of the High and Mid Latitude Ionosphere and its Relation to Geospace Dynamics Space science

title: Three-dimensional electron density along the WSA and MSNA latitudes probed by FORMOSAT-3/COSMIC Coupling of the High and Mid Latitude Ionosphere and its Relation to Geospace Dynamics Space science abstract: 摘要： In this paper, we employ electron density profiles derived by the GPS radio occultation experiment aboard the FORMOSAT-3/COSMIC (F3/C) satellites to examine the electron density on geographic latitudes of 40° to 80° in the Southern hemisphere and 30° to 60° in the Northern hemisphere at various global fixed local times from February 2009 to January 2010. The results reveal that an eastward shift of a single-peak plasma density feature occurs along the Weddell Sea Anomaly (WSA) latitudes, while a double-peak plasma density feature appears along the northern Mid-latitude Summer Nighttime Anomaly (MSNA) latitudes. A cross-comparison between three-dimensional F3/C electron density and HWM93 simulation confirms that the magnetic meridional effect and vertical effect caused by neutral winds exhibit the eastward shifts. Furthermore, we find that the eastward shift of the peaks when viewed as a function of local time suggests that they could be interpreted as being comprised of different tidal components with distinct zonal phase velocities in local time. 其他題名： Earth Planet Sp 出版者： Berlin/Heidelberg: Springer Berlin Heidelberg 出版日期： 2015-09-21 出處： Earth, planets, and space, 2015-09, Vol.67 (1), p.1-8, Article 156 資源來源： Publicly Available Content Database 版權： Chang et al. 2015 識別號： ISSN: 1880-5981 識別號： ISSN: 1343-8832 識別號： EISSN: 1880-5981 識別號： DOI: 10.1186/s40623-015-0326-8