The ionospheric behavior in conjugate hemispheres during the 3 October 2005 solar eclipse
We investigate the ionospheric behavior in conjugate hemispheres during the 3 October 2005 solar eclipse, on the basis of observations of electron temperature (<I>T<sub>e</sub></I>) from the Defense Meteorological Satellites Program (DMSP) spacecraft, F2 layer critical fre...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2009-01-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/27/179/2009/angeo-27-179-2009.pdf |
| _version_ | 1811317463036461056 |
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| author | H. Le H. Le L. Liu X. Yue W. Wan |
| author_facet | H. Le H. Le L. Liu X. Yue W. Wan |
| author_sort | H. Le |
| collection | DOAJ |
| description | We investigate the ionospheric behavior in conjugate hemispheres during the
3 October 2005 solar eclipse, on the basis of observations of electron
temperature (<I>T<sub>e</sub></I>) from the Defense Meteorological Satellites Program (DMSP)
spacecraft, F2 layer critical frequency (<I>fo</I>F2) and F2 layer peak height
(<I>hm</I>F2) at the Grahamstown ionosonde station, and total electron content (TEC)
from the Global Positioning System (GPS) station SUTH. The observations show
that when the eclipse occurred in the Northern Hemisphere, there was a
decrease in <I>T<sub>e</sub></I>, an increase in <I>fo</I>F2 and TEC, and an uprising in <I>hm</I>F2 in its
conjugate region compared with their reference values. We also simulated the
ionosphere behavior during this eclipse using a mid- and low-latitude
ionospheric model. The simulations agree well with the observations. Because
of the eclipse effect, there are far fewer photoelectrons travelling along
the magnetic field lines from the eclipse region to the conjugate region,
resulting in reduced photoelectron heating in the conjugate hemisphere which
causes a drop in electron temperature and subsequent disturbances in the
region. |
| first_indexed | 2024-04-13T12:08:21Z |
| format | Article |
| id | doaj.art-a978dfba8ac0421b952e7e10f956ca40 |
| institution | Directory Open Access Journal |
| issn | 0992-7689 1432-0576 |
| language | English |
| last_indexed | 2024-04-13T12:08:21Z |
| publishDate | 2009-01-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj.art-a978dfba8ac0421b952e7e10f956ca402022-12-22T02:47:34ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762009-01-012717918410.5194/angeo-27-179-2009The ionospheric behavior in conjugate hemispheres during the 3 October 2005 solar eclipseH. Le0H. Le1L. Liu2X. Yue3W. Wan4Beijing National Observatory of Space Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaGraduate School of the Chinese Academy of Sciences, Beijing 100049, ChinaBeijing National Observatory of Space Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaBeijing National Observatory of Space Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaBeijing National Observatory of Space Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaWe investigate the ionospheric behavior in conjugate hemispheres during the 3 October 2005 solar eclipse, on the basis of observations of electron temperature (<I>T<sub>e</sub></I>) from the Defense Meteorological Satellites Program (DMSP) spacecraft, F2 layer critical frequency (<I>fo</I>F2) and F2 layer peak height (<I>hm</I>F2) at the Grahamstown ionosonde station, and total electron content (TEC) from the Global Positioning System (GPS) station SUTH. The observations show that when the eclipse occurred in the Northern Hemisphere, there was a decrease in <I>T<sub>e</sub></I>, an increase in <I>fo</I>F2 and TEC, and an uprising in <I>hm</I>F2 in its conjugate region compared with their reference values. We also simulated the ionosphere behavior during this eclipse using a mid- and low-latitude ionospheric model. The simulations agree well with the observations. Because of the eclipse effect, there are far fewer photoelectrons travelling along the magnetic field lines from the eclipse region to the conjugate region, resulting in reduced photoelectron heating in the conjugate hemisphere which causes a drop in electron temperature and subsequent disturbances in the region.https://www.ann-geophys.net/27/179/2009/angeo-27-179-2009.pdf |
| spellingShingle | H. Le H. Le L. Liu X. Yue W. Wan The ionospheric behavior in conjugate hemispheres during the 3 October 2005 solar eclipse Annales Geophysicae |
| title | The ionospheric behavior in conjugate hemispheres during the 3 October 2005 solar eclipse |
| title_full | The ionospheric behavior in conjugate hemispheres during the 3 October 2005 solar eclipse |
| title_fullStr | The ionospheric behavior in conjugate hemispheres during the 3 October 2005 solar eclipse |
| title_full_unstemmed | The ionospheric behavior in conjugate hemispheres during the 3 October 2005 solar eclipse |
| title_short | The ionospheric behavior in conjugate hemispheres during the 3 October 2005 solar eclipse |
| title_sort | ionospheric behavior in conjugate hemispheres during the 3 october 2005 solar eclipse |
| url | https://www.ann-geophys.net/27/179/2009/angeo-27-179-2009.pdf |
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