Calculation of pseudo solar narrow band oscillations produced by atmospheric differential extinction

Details Calculation of pseudo solar narrow band oscillations produced by atmospheric differential extinction Calculation of pseudo solar narrow band oscillations produced by atmospheric differential extinction

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....77..351g&link_type=abstract

Astronomy and Astrophysics, vol. 77, no. 3, Aug. 1979, p. 351-353.

Physics

Optics

16

Atmospheric Optics, Doppler Effect, Solar Oscillations, Solar Spectra, Bandwidth, Diurnal Variations, Harmonic Analysis, Transparence

Scientific paper

It is suggested that diurnal effects due to the atmospheric transparency may give rise to systematic drift in solar Doppler measurements. The effect of differential atmospheric transparency on measurements is investigated. It is shown to favour harmonic 8, 9, and 10 for measurement durations from 4 to 10 h. This effect can explain an amplitude close to 1 m/s for these harmonics, and also the appearance of phase coherence over long time periods.

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