Lunar-solar tides in electron density at fixed heights of the ionosphere

Sharma, R. P. ; Rastogi, R. G. (1971) Lunar-solar tides in electron density at fixed heights of the ionosphere Planetary and Space Science, 19 (10). pp. 1349-1357. ISSN 0032-0633

Full text not available from this repository.

Official URL:

Related URL:


Lunar tidal variations in the electron density N at fixed heights of the ionosphere for different solar hours have been computed at the equatorial station Huancayo, and the mid-latitude station Puerto Rico. It is found that the tidal amplitudes increase rapidly with altitude between 180 and 250km. At Huancayo the phase i.e. time of maximum positive deviation of lunar semi-diurnal variations in N is 07-08 lunar hr for the lower regions (below 180 km); it changes sharply at heights around 200 km, above which it is 03-04 lunar hr. The amplitude of the tide at heights around 200 km is independent of solar hr. At Puerto Rico, the phase is continuously retarded with increasing height; it is about 01 lunar hr in E-region heights and changes to about 09-10 lunar hr at heights near hmax. It is seen that lunar oscillations in the E- and F1-regions, at both the places, are in phase with corresponding magnetic field variations. Various observed results are explained as due to lunar variations in the magnetic field through the variations in the vertical electrodynamic drift velocities.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:45888
Deposited On:29 Jun 2011 06:44
Last Modified:29 Jun 2011 06:44

Repository Staff Only: item control page