Longitudinal variation of equatorial electrojet parameters derived from POGO satellite observations

Details Longitudinal variation of equatorial electrojet parameters derived from POGO satellite observations Longitudinal variation of equatorial electrojet parameters derived from POGO satellite observations

Jun 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981p%26ss...29..627o&link_type=abstract

Planetary and Space Science, vol. 29, June 1981, p. 627-634. Research sponsored by the Institute of Management and Technology.

Computer Science

Sound

23

Equatorial Electrojet, Longitude, Satellite Sounding, Daytime, Magnetic Signatures, Pogo, Vertical Distribution

Scientific paper

The characteristics of the equatorial electrojet are obtained as a function of longitude based on an analysis of POGO satellite measurements of the magnetic field of the equatorial electrojet. Data for two September equinoctal months for each of three years was analyzed within the framework of the electrojet model of Onwumechili (1967), in which the magnitude of the magnetic field oscillates with altitude, in order to obtain values of the electrojet half width and intensities. The half width is found not to vary appreciably with longitude, while both the peak eastward current intensity and the total eastward current vary significantly, both reaching major maxima of 349 A/km and 73,000 A respectively, at 100 and 280 deg E longitudes which are only prominent near local noon, and minima of 129 A/km and 33,000 A, respectively, at 160 and 230 deg E. It is argued that unexpected features of the longitudinal current variations can be explained by longitudinal variations in the wind systems and gradients at electrojet altitudes.

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