Open AccessAtmospheric tides in the ionosphere. II. Lunar tidal variations in the F region near the magnetic equator
Author(s) -
D. F. Martyn
Publication year - 1947
Publication title -
proceedings of the royal society of london. series a, mathematical and physical sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.814
H-Index - 135
eISSN - 2053-9169
pISSN - 0080-4630
DOI - 10.1098/rspa.1947.0076
Subject(s) - equator , ionosphere , amplitude , atmospheric tide , variation (astronomy) , atmospheric sciences , magnetic dip , lunar orbit , physics , geophysics , geodesy , geology , thermosphere , astrophysics , astronomy , latitude , optics , spacecraft
Three years’ data for the heights and critical frequencies of theF 1 andF 2 regions at Huancayo, Peru, are examined for lunar tides. Semi-diurnal lunar tides are found in all quantities savef 0 F 1 . It is found that the lunar variation in theF 2 region depends on solar time in both phase and amplitude. At certain solar epochs it attains very large amplitudes, up to 60 km. inh max. F 2 and 28% inf 0 F 2 . The theory of these variations, originated in a previous paper, is further developed.