Observations of the Ionospheric Total Electron Contents During the Solar Eclipse of October 24,1995 by Using the GPS Beacon

利用全球定位衛星信標觀察電子總含量在1995年10月24日日蝕時之變化

徐繼生(J. S. Xu)；馬淑英(S. Y. Ma)；吳瓊(Q. Wu)

Solar Eclipse ； Ionosphere ； GPS Satellite Beacon ； TEC Measurement

Terrestrial, Atmospheric and Oceanic Sciences

8卷2期（1997 / 06 / 01）

179 - 188

英文

The Royal Australian Air Force operates an Over The Horizon Radar(OTHR)from Alice Springs in Central Australia.This OTHR is calledJindalee.Since the active medium for this form of radar is the ionosphere,Australia has a continuing interest in the physics of this region of the upperatmosphere.One of the support instruments for Jindalee is a very much scaled downversion of the radar,called the Mini-Radar.It forms part of the FrequencyManagement System(FMS),and it is used to provide operators of the mainradar with advice on ionospheric conditions,and it operates in an identicalfashion to the main radar,recording the signal strength of surfacebackscattered HF radio echoes as a function of range,Doppler and azimuth.October 1995 marked the occurrence a total solar eclipse,in which thepath of totality travelled eastward from near the Caspian Sea,past the Philippinesand out into the Pacific Ocean.Since this region falls within thearea”covered”by the Mini-Radar,it was decided to use this instrument tomonitor ionospheric behaviour during the period of the eclipse.Early results are presented.