Physics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsa51d1654d&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SA51D-1654
Physics
[2439] Ionosphere / Ionospheric Irregularities
Scientific paper
VTEC GPS data from LISN Network from 2008 is being analyzed to get the ionospheric conditions that generate spread F irregularities, like bubbles, in the South American (SA) continent. Using Automatic Bubble Detection Algorithm (ABDA), it was possible to find bubble signatures (hundreds of kilometers scale size) between September and December months. The bubble occurrence pattern over SA in general follows the characteristics of bubbles detected previously with digisonde and satellite (e.g. DMSP, CHAMP) that are September-October in the west and November-December in the east. However we have observed bubbles signatures all over the continent among September to December period. Digisonde ionospheric parameters (NmF2, h'F and foF2) were measured to describe the ionospheric local conditions over Fortaleza (Brazil) and Jicamarca (Peru) that can help us to understand the characteristics of the phenomena described here. Digisonde data from Fortaleza located at 3.8S, 38W and 9S dip latitude, and Jicamarca located at 12S, 76.9W and 1N dip latitude were used to measure the day-to-day longitudinal variation. We will show the variation of NmF2, h'F and foF2 in these two stations when spread F (bubble) presence is in the east, in the west and all over the continent.
Batista Inez S.
de La Cruz Cueva R.
de Paula Eurico R.
Valladares Cesar E.
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