Computer Science
Scientific paper
Dec 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994adspr..14...75m&link_type=abstract
Advances in Space Research, Volume 14, Issue 12, p. 75-78.
Computer Science
7
Scientific paper
High resolution electron density measurements from Arecibo incoherent scatter (i.s.) radar are used to make a detailed study of the E-F valley. Features of the important valley parameters like height, width and depth are examined. These features are then compared with the available theoretical and empirical models. The depth of the valley obtained from the empirical models agrees with i.s. measurements for near-noon periods, but disagrees with these measurements for pre-noon and post-noon periods. Further, the i.s. measurements indicate that E-F valley is rather small during daytime as compared to models which give larger width. During the night, the valley is quite wide and deep but the presence of sporadic-E (Es) contaminates the Ne-h profiles observed with the i.s. radar. As a result the valley parameters cannot be determined unambiguously during the night.
Goel M. K.
Kohli Ramesh
Mahajan K. K.
Pandey V. K.
Sethi N. K.
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