Articles | Volume 8, issue 9
https://doi.org/10.5194/amt-8-3715-2015
https://doi.org/10.5194/amt-8-3715-2015
Research article
 | 
16 Sep 2015
Research article |  | 16 Sep 2015

Pointing errors in solar absorption spectrometry – correction scheme and its validation

A. Reichert, P. Hausmann, and R. Sussmann

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Short summary
A method for quantification of sun-pointing inaccuracies in solar absorption spectrometry is presented along with a correction scheme for the resulting errors in trace gas vertical column or profile retrievals. The mispointing is constrained by combining subsequent measurements of solar line shifts with differing orientations of the solar rotation axis relative to the zenith direction. The implementation and benefits of the method are demonstrated using the Zugspitze XCH4 measurements.