HF Doppler Backscatter Observations of the October 1995 Total Solar Eclipse

1995年10月24日日蝕時高頻都卜勒反散射儀之觀察

Dan Meehan

Terrestrial, Atmospheric and Oceanic Sciences

8卷2期（1997 / 06 / 01）

189 - 202

英文

The ionosonde measurements made at Waltair(20°N dip)during thesolar eclipse of 24th October 1995 showed significant decreases in both thecritical frequency and the height of the F-layer during the eclipse.Also,significant oscillatory variations were observed in h'F and f0F2 during thecourse of the eclipse.When compared with the control days,f0F2 and f0F1fell by about 15% and as much as 50%,respectively,on the eclipse day.The spectral components derived from the quasi-periodic variations observedin f0F2 and h＇F over Waltair(81% obscuration)clearly showed thepresence of an additional 30-minute component on the eclipse day,whichwas not present on the control days,indicating that the waves are observedaway from the totality path.