HR: 1340h
AN: SA43A-1107    [Abstracts]
TI: The relationship between TIMED/GUVI and Global GPS-TEC measurements in the equatorial ionization anomaly region
AU: * Hsu, M
EM: mlhsu2000@yahoo.com.tw
AF: Institute of Space Science, National Central University, Taiwan, Institute of Space Science, National Central University, Chung-Li, 320 Taiwan
AU: LIU, J
EM: jyliu@jupiter.ss.ncu.edu.tw
AF: Institute of Space Science, National Central University, Taiwan, Institute of Space Science, National Central University, Chung-Li, 320 Taiwan
AU: LIU, J
EM: jyliu@jupiter.ss.ncu.edu.tw
AF: Center for Space and Remote Sensing Research, National Central University, Taiwan, Center for Space and Remote Sensing Research, National Central University, Chung-Li, 320 Taiwan
AU: LIN, C
EM: clin@jupiter.ss.ncu.edu.tw
AF: National Space Program Office, Taiwan, National Space Program Office, Hsin-Chu, 300 Taiwan
AU: TSAI, H
EM: hftsai@cwb.gov.tw
AF: Central Weather Bureau, Taiwan, Central Weather Bureau, Taipei, 100 Taiwan
AB: The Global Ultraviolet Imager (GUVI) onboard NASA TIMED spacecraft is currently mapping ionospheric radiation at six different wavelengths. The GUVI image from OI 135.6 nm emission shows clear signatures of the equatorial ionization anomaly (EIA). To analyze the relationship between the intensity of the ion emission and total electron content (TEC), the GUVI observed global EIA structures are compared with the Global Ionospheric TEC map derived from global GPS network during 2002-2003. We compare the peak density/intensity and location of the EIA peak observed by both GUVI radiance data and GPS-TEC. Results show that the GUVI radiances have linear relationship with the GPS-TEC but the slope of the linear relationship shows seasonal effects. By determining the linear relationship between the GUVI radiance and GPS-TEC, the GUVI image provides additional information of the EIA peak, which can be the implement in constructing the global ionospheric TEC map especially at the location where no ground based GPS receiver is available.
DE: 0310 Airglow and aurora
DE: 0355 Thermosphere: composition and chemistry
DE: 0520 Data analysis: algorithms and implementation
SC: SPA-Aeronomy [SA]
MN: Fall Meeting 2005