Journal cover Journal topic
Annales Geophysicae An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

IF value: 1.490
IF1.490
IF 5-year value: 1.445
IF 5-year
1.445
CiteScore value: 2.9
CiteScore
2.9
SNIP value: 0.789
SNIP0.789
IPP value: 1.48
IPP1.48
SJR value: 0.74
SJR0.74
Scimago H <br class='widget-line-break'>index value: 88
Scimago H
index
88
h5-index value: 21
h5-index21
Volume 14, issue 3
Ann. Geophys., 14, 297–303, 1996
https://doi.org/10.1007/s00585-996-0297-y
© European Geosciences Union 1996
Ann. Geophys., 14, 297–303, 1996
https://doi.org/10.1007/s00585-996-0297-y
© European Geosciences Union 1996

  31 Mar 1996

31 Mar 1996

Seasonal and solar cycle association of zonal drifts of ionospheric plasma irregularities in the Indian equatorial region

B. M. Pathan and D. R. K. Rao B. M. Pathan and D. R. K. Rao

Abstract. Long series of simultaneous VHF scintillation observations at two stations situated in near magnetic east-west direction in the vicinity of the dip equator in the Indian region have been employed to investigate the night-time ionospheric plasma zonal drifts. The drifts are found to be predominantly easterly. On comparing the magnitudes of the drifts with those results derived earlier by HF fading technique, monitoring signals from two satellites at a station and spaced receiver experiment, their associations with the season and the degree of solar activity are discussed. On a broader scale, the annual mean sunspot number is shown to have a direct control on the derived drift, the positive relationship even on day to day basis with the solar flux is established. However, the relationship, as understood by the slope of the best fit line, in the Indian region (0.27) is found to be weaker when compared with the similar slope (0.45) in the American sector. There appears to be no geomagnetic activity control on the estimated drifts.

Publications Copernicus
Citation