The Characteristics of the Post-midnight Plasma Irregularities in Low-to-mid Latitude during the Solar Minimum Period Observed by the DMSP and the CHAMP

Details The Characteristics of the Post-midnight Plasma Irregularities in Low-to-mid Latitude during the Solar Minimum Period Observed by the DMSP and the CHAMP The Characteristics of the Post-midnight Plasma Irregularities in Low-to-mid Latitude during the Solar Minimum Period Observed by the DMSP and the CHAMP

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsa23a1876o&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SA23A-1876

Physics

[2400] Ionosphere, [2439] Ionosphere / Ionospheric Irregularities

Scientific paper

Plasma irregularities in mid-to-low latitude are a significant feature that can be responsible for the interference to radio communications and navigation systems. The characteristics of the plasma irregularities during the solar minimum period, significantly different from the previous studies during solar active period, have been revealed by the recent observations. The most distinguishing signature of the plasma irregularities during the solar minimum is the peak in occurrence frequency that appears in the post-midnight sector with the low level of background ionosphere density. Moreover, the plasma irregularities exist at the morning sector during the solar minimum period. However, the onset conditions and the mechanisms to explain the occurrence of those irregularities are still questionable. We investigate the post-midnight irregularities at solar minimum based on the in-situ measurement observations by the DMSP F13 and the CHAMP. The association of the occurrence pattern with the background ionospheric parameters such as the vertical drift velocity, the background density and the density gradient will be discussed.

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