Computer Science – Numerical Analysis
Scientific paper
Feb 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983phdt.........7t&link_type=abstract
Ph.D. Thesis California Univ., Los Angeles.
Computer Science
Numerical Analysis
1
Annual Variations, Irregularities, Plasma Turbulence, Sporadic E Layer, Electric Fields, Ionospheric Drift, Numerical Analysis, Prediction Analysis Techniques, Stability, Wind Shear
Scientific paper
Irregularities of the order of 6 meters in wavelength which are revealed by radar observation to be present in the E region of the middle latitude ionosphere were studied. Systematic observations of the irregularities were carried out at Iioka, Japan by using a 25 MHz radar and a multifrequency (4-64 MHz) radar during the years 1973 to 1977. The irregularities are observed to be field aligned structures to within the observational errors. They are closely associated with sporadic E (Es) layers and occur mostly in the lower E region near 100 km. The occurrence of irregularities is predominantly in the nighttime with a maximum at premidnight. Seasonal occurrence of these irregularities shows a summer maximum, minima in equinoxes and a secondary peak in winter. The irregularities move predominantly in the westward direction with speeds of the order of 60 m/s. North-south components of motion are observed with much less frequency.
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