Articles | Volume 12, issue 6
Research article
26 Jun 2019
Research article |  | 26 Jun 2019

The ICAD (iterative cavity-enhanced DOAS) method

Martin Horbanski, Denis Pöhler, Johannes Lampel, and Ulrich Platt

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Cited articles

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Short summary
ICAD allows a precise in situ measurement of gases like NO2 in a relatively simple and compact setup. The main advantage in comparison to most other optical methods is that it does not require a stable total light intensity. This allows a simpler and mobile instrument setup and additionally it features no observed cross-interferences. We validated the high quality for an ICAD NO2 instrument in different inter-comparisons with a detection limit of 0.02 ppbv.