Physics
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agusmsa34a..07l&link_type=abstract
American Geophysical Union, Spring Meeting 2009, abstract #SA34A-07
Physics
2400 Ionosphere (6929), 2443 Midlatitude Ionosphere
Scientific paper
Seasonal anomaly (winter anomaly) that the daytime electron density of F2-layer in winter is higher than in summer is observed by FORMOSAT-3/COSMIC ionospheric radio occultation (COSMIC RO) measurements. Ionospheric electron density profiles retrieved from RO measurements provide the global feature of ionospheric variations. COSMIC RO measurements from November 2006 to February 2009 in geomagnetic quiet conditions are used to study the global aspect of seasonal anomaly. Electron density variations with the height in America, African/European and Asian sector are analyzed for the longitudinal variation of electron density in the winter and the summer season of the northern hemisphere. The result from COSMIC RO in northern hemisphere at mid-latitudes is compared and validated with electron density measurements of Incoherent Scatter Radar (ISR) in Millstone Hill, typically known as a winter anomaly station.
Cho Sungtae
Coster Anthea
Kuo Y.-Y.
Lee Weonjong
Park Jaemo
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