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Browsing by Subject "Equatorial Atmosphere"

Browsing by Subject "Equatorial Atmosphere"

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  • Equatorial electric-fields of ionospheric disturbance dynamo orgin 
    Sastri, J. H (European Geosciences Union, 1988-12)
    Persistent and significant reductions in the strength of the equatorial electrojet, accompanied by poor development of the equatorial ionization anomaly, are noted to sometimes occur in association with negative ionospheric ...
  • IMF polarity effects on the equatorial ionospheric F-region 
    Sastri, J. H (1985)
    An exploratory study is made of the influence, during the equinoxes, of the interplanetary magnetic field (IMF) sector structure on the ionospheric F-region using ionosonde data from several equatorial stations for a 3-yr ...
  • Interplanetary magnetic field and equatorial ionosphere 
    Sastri, J. H (European Geophysical Society, 1980-06)
    Relationships between events in the interplanetary magnetic field and the equatorial ionosphere are investigated. Simultaneous data showing sudden northward transitions of the interplanetary magnetic field and nighttime ...
  • Ionosphere scintillations associated with features of equatorial ionosphere 
    Chandra, H; Vats, H. O; Sethia, G; Deshpande, M. R; Rastogi, R. G; Sastri, J. H; Murthy, B. S (European Geophysical Society, 1979-09)
    Amplitude scintillations of radio beacons aboard the ATS-6 satellite on 40 MHz, 140 MHz and 360 MHz recorded during the ATS-6 phase II at an equatorial station Ootacamund (dip 4 deg N) and the ionograms at a nearby station ...
  • Optical interferometer measurements of thermospheric temperature at Kavalur (12.5 deg N, 78.5 deg E), India 
    Sastri, J. H; Rao, H. N. R (Elsevier, 1994-02)
    First results on the behavior of thermospheric temperature over Kavalur (12.5 deg N, 78.5 deg E geographic; 2.8 deg N geomagnetic latitude) located close to the geomagnetic equator in the Indian zone are presented. The ...
  • Patchy occurrence of equatorial spread-F 
    Sastri, J. H (European Geosciences Union, 1985-10)
    From a statistical analysis of ionogram data of Kodaikanal (dip 3.5 deg N) it is shown that, during years of high sunspot activity, the discontinuous or patchy occurrence of equatorial spread-F (ESF) depends on season. ...
  • Range and frequency spread-F at Kodaikanal 
    Sastri, J. H; Sasidharan, K; Subramanyam, V; Srirama Rao, M (European Geophysical Society, 1979-09)
    Using ionogram data at Kodaikanal (geomagnetic lat. 06 deg N, Dip 3.5 deg N) over a seven year period, Jan. 1957-Dec. 1963, a study is made of the seasonal and sunspot cycle variations in the nocturnal occurrence of amplitude ...
  • Total electron content and F-region electron density distribution near the magnetic equator in India 
    Rastogi, R. G; Sethia, G; Chandra, H; Deshpande, M. R; Davies, K; Murthy, B. S (Pergamon Press, 1979-06)
    Total electron content derived from the group delay measurements of ATS-6 radio beacons received at Ootacamund (India) are compared with the electron-density vs height distributions derived from the ionosonde data of the ...

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