Physics – Geophysics
Scientific paper
Dec 1970
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1970papge..80..288s&link_type=abstract
Pure and Applied Geophysics PAGEOPH, Volume 80, Issue 1, pp.288-308
Physics
Geophysics
1
Scientific paper
The lunar daily ( L) and lunar monthly ( M) variations in horizontal magnetic field ( H), maximum electron density ( N max ), height of peak ionisation ( h max ), semi-thickness ( y m ) of the F 2 layer and total electron content ( N t ) at Huancayo for the period January 1960 to December 1961 are described. The lunar tidal variations in h max follow sympathetically the variations in H such that an increase of magnetic field causes the raising of height of peak ionisation. Lunar tides in N max are opposite in phase to that of h max with a delay of about 1 2 hours, suggesting that an increase of height causes a decrease in maximum electron density. The lunar tides in semi-thickness are very similar in phase to that in h max . The lunar tidal effects in any of the parameters are largest in D-months and least in J-months. The amplitude of lunar tides in maximum electron density seems to increase with increasing height whereas the phase seems to be constant with height. It is concluded that lunar tides in the ionospheric parameters at magnetic equator are greatly controlled by the corresponding geomagnetic variations.
Rastogi R. G.
Sharma R. P.
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