A detector of small gradients of transparency of the terrestrial atmosphere

Details A detector of small gradients of transparency of the terrestrial atmosphere A detector of small gradients of transparency of the terrestrial atmosphere

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988esasp.286..223m&link_type=abstract

In ESA, Seismology of the Sun and Sun-Like Stars p 223-225 (SEE N89-25819 19-92)

Physics

Optics

1

Atmospheric Optics, Imaging Techniques, Solar Spectrometers, Space Observations (From Earth), Sun, Atmospheric Refraction, Atmospheric Stratification, P Waves, Solar Spectra

Scientific paper

In the study of low l p-modes of the Sun in integrated sunlight with ground based spectrometers it was found that even small (0.001) gradients in transparency across the solar disk give rise to displacements of centroids of spectral lines at the m/s level. A prototype instrument which measures this atmospheric gradient continuously, and thereby makes it possible to subtract these artefacts from the measurements, is described.

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