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| Titel |
A passive DOAS instrument for trace gas measurements on medium sized UAS: Instrumental design and first measurements. |
| VerfasserIn |
Martin Horbanski, Denis Pöhler, Tobias Mahr, Thomas Wagner, Christos Keleshis, Stelios Ioannou, Manfred A. Lange, Jos Lelieveld  , Ulrich Platt |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250076621
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| Zusammenfassung |
| Unmanned Aerial Systems (UAS) are a new powerful tool for observations in the
atmospheric boundary layer. Recent developments in measuring technology allow the
construction of compact and sensitive active and passive DOAS instruments which can fit the
space and weight constraints on UAS. This opens new possibilities for trace gas
measurements in the lower troposphere, especially in areas which are not accessible to
manned aviation e.g. volcanic plumes or which should be monitored regularly (e.g. industrial
emissions of a stack).
We present a new developed passive DOAS instrument for the APAESO Platform of the
Cyprus Institute, a medium size UAS. It is equipped with two telescopes for observations in
downward (nadir) and horizontal (limb) viewing direction, respectively. Thus it allows
determining height profiles and the horizontal distribution of trace gases. This is
accomplished by analyzing the radiation collected by the telescopes with compact
spectrometers, which cover the UV-blue spectral range allowing to measure a broad variety
of atmospheric trace gases (e.g. NO2, SO2, BrO, IO, H2O ...) as well as aerosol
properties via O4 absorption. Additionally, the nadir direction is equipped with a
VIS-NIR spectrometer. It is used to measure reflection spectra of different types of
vegetation. These will serve as references for satellite measurements to create global
maps.
First measurements on the APAESO platform were performed in October 2012 on Cyprus
in a rural area south of Nicosia. The instrument is shown to work reliably and was able to
detect NO2, H2O and O4 at atmospheric column densities.
The instrumental design and first measurements will be presented and discussed. |
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