Negative Effect on Electron Density in Mid-latitude Ionosphere due to Geomagnetic Disturbances: FORMOSAT-3/COSMIC Observations

Details Negative Effect on Electron Density in Mid-latitude Ionosphere due to Geomagnetic Disturbances: FORMOSAT-3/COSMIC Observations Negative Effect on Electron Density in Mid-latitude Ionosphere due to Geomagnetic Disturbances: FORMOSAT-3/COSMIC Observations

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsa23b1486t&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SA23B-1486

Other

[2443] Ionosphere / Midlatitude Ionosphere, [7999] Space Weather / General Or Miscellaneous

Scientific paper

The ionospheric plasma usually responds drastically to severe space weather conditions, signified by strong magnetic field disturbances in the near-Earth environment. The level of disturbances is often well characterized by global indices such as Kp and Dst. Our statistical studies examine the ionospheric vertical electron density profiles under different levels of geomagnetic activities, as characterized by such indices. The studies are based on observations from the GPS occultation experiment (GOX) aboard the six satellites of the FORMOSAT-3/COSMIC mission, a Taiwan-US collaborative project that has been providing, among other data, observations of vertical electron density profiles of the ionosphere up to 800 km altitude since 2006. The results of our studies indicate a negative effect on the electron density at mid-latitude due to the presence of geomagnetic disturbances, particularly during nighttime and early morning. We discuss the physical reasons associated with geomagnetic activities that may result in the observed changes in the ionospheric electron density.

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