Physics
Scientific paper
Oct 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981olsf.rept.....s&link_type=abstract
Unknown
Physics
F Region, Ionospheric Disturbances, Light Emission, Nightglow, Nocturnal Variations, Ionosondes, Magnetic Anomalies, Plasmas (Physics), Sky Brightness
Scientific paper
The measurements were made with a two-channel photometer which permitted scanning observations both along and across the magnetic meridian. Observations at 7774 A can detect large scale irregularities near the F-region peak height, whereas observations at 6300 A detect such irregularities at an altitude about 50 km to 100 km lower, depending on the F-region height. On several nights, during spread-F conditions, as indicated by an ionosonde operating at the same location, the presence of large intensity depletions of short duration were detected in both emissions. These depletions were observed to move towards the east in the east-west scans, and usually towards the south in the north-south scans. Salient features of these observations are presented and discussed.
Bittencourt J. A.
Sahai Yogeshwar
Takahashi Hiroyuki
Teixeira N. R.
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