Telluric Lines

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Telluric Lines

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Absorption lines in a solar spectrum produced by constituents of the atmosphere of the earth itself rather than by gases in the outer solar atmosphere such as those responsible for the Fraunhofer lines. The terrestrial nature of the absorption processes responsible for telluric lines is revealed by their intensity variation with solar zenith angle and by their freedom from any Doppler broadening due to their solar rotation. Water vapor produces the strongest of the telluric lines in the visible spectrum. [[/a>|/a>]] </dd>

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use