Effects of magnetic-storm phases on F-layer irregularities from auroral to equatorial latitudes. Quarterly report, 1 Oct-31 Dec 91
Several periods of interest in the low sunspot years of 1985 and 1986 have been identified when data were available from Kiruna, Sweden and from Goose Bay, Labrador as well as from equatorial sites. A contouring program was developed to handle the Transit data and in fact have received data from several sample periods of very low magnetic activity over a period of several days. Just begun is this study of determining the pattern of F-layer irregularities during years of low solar flux. The evaluation of data sets has included new analysis (for Manila, for example) as well as evaluating older data, much of it at this date unused for scientific purposes. While F-region irregularities are frequently spoken of occuring in the auroral region, the behavior of the irregularities as a function of sunspot number is significantly different from the behavior of the auroral region. Auroral data, primarily of the E layer green line, show no significant changes as a function of sunspot number in the latitude of the occurrence of this phenomenon; F-region irregularities show a great movement towards the polar region with a low sunspot number. In order to predict the occurrence and level of the effects on trans-ionospheric propagation, the relationship to sunspot number must be ascertained. We feel the comparison of high latitude data from Sweden and Canada will allow us to state that a polar movement of the region during low sunspot years is a global phenomenon.
- Research Organization:
- Boston Univ., MA (United States). Center for Space Physics
- OSTI ID:
- 5480445
- Report Number(s):
- AD-A-245495/7/XAB; CNN: N00014-89-J-1754
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effects of magnetic storm phases on F-layer irregularities from auroral to equatorial latitudes. Quarterly report, 1 July-30 September 1993
Very high latitude F-region irregularities observed by HF-radar backscatter
Related Subjects
GENERAL PHYSICS
F REGION
ELECTRON DENSITY
MAGNETIC STORMS
IONOSPHERIC EFFECTS
AURORAE
CANADA
E REGION
EQUATOR
MAGNETIC FIELDS
POLAR REGIONS
PROGRESS REPORT
SOLAR RADIATION
SUNSPOTS
SWEDEN
WAVE PROPAGATION
DEVELOPED COUNTRIES
DOCUMENT TYPES
EARTH ATMOSPHERE
EUROPE
IONOSPHERE
NORTH AMERICA
PLANETARY IONOSPHERES
RADIATIONS
SCANDINAVIA
SOLAR ACTIVITY
STARSPOTS
STELLAR ACTIVITY
STELLAR RADIATION
661320* - Auroral
Ionospheric
& Magnetospheric Phenomena- (1992-)