Multistation study of nighttime scintillations in low latitudes: evidence of control by equatorial F region irregularities

Conference · Tue May 01 04:00:00 EDT 1984 · Radio Sci.; (United States)

OSTI ID:6496435

Somayajulu, Y V; Garg, S C; Dabas, R S; Singh, L

Equatorial spread F (ESF) and VHF scintillations have only in recent years been related to large-scale upwelling plumelike irregularity structures identified on VHF backscatter radar intensity maps. The present investigation is concerned with the results of an experiment of VHF scintillations recorded at a meridian chain of stations in India extending from close to the magnetic equator to 24.8 deg N magnetic latitude. It is found that the latitudinal development of scintillation-producing irregularities during high solar activity conditions is controlled by the development of ESF irregularities over the magnetic equator. Scintillations at all the stations equatorward of 21 deg N magnetic latitude are saturated, and their onset in the postsunset hours is almost abrupt. The occurrence of scintillations at latitudes away from the equator is dependent on their prior occurrence near the magnetic equator. 57 references.

• Research Organization: National Physical Lab. of India, New Delhi
• OSTI ID: 6496435
• Report Number(s): CONF-830274-
• Conference Information: Journal Name: Radio Sci.; (United States) Journal Volume: 19
• Country of Publication: United States
• Language: English

Related Subjects

640201* -- Atmospheric Physics-- Auroral
Ionospheric
& Magetospheric Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ASIA
BACKSCATTERING
DEVELOPING COUNTRIES
EARTH ATMOSPHERE
ELECTROMAGNETIC RADIATION
F REGION
FREQUENCY RANGE
INDIA
IONOSPHERE
MHZ RANGE
MICROWAVE RADIATION
PLANETARY IONOSPHERES
RADIATIONS
SCATTERING