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| Titel |
EARLINET Single Calculus Chain – overview on methodology and strategy |
| VerfasserIn |
G. D'Amico, A. Amodeo, H. Baars, I. Binietoglou, V. Freudenthaler, I. Mattis, U. Wandinger, G. Pappalardo |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 8, no. 11 ; Nr. 8, no. 11 (2015-11-20), S.4891-4916 |
| Datensatznummer |
250116691
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| Publikation (Nr.) |
 copernicus.org/amt-8-4891-2015.pdf |
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| Zusammenfassung |
| In this paper we describe the EARLINET Single Calculus Chain (SCC), a tool for
the automatic analysis of lidar measurements. The development of this
tool started in the framework of EARLINET-ASOS (European Aerosol
Research Lidar Network – Advanced Sustainable Observation System); it was extended within ACTRIS (Aerosol, Clouds and
Trace gases Research InfraStructure Network), and it is continuing within
ACTRIS-2. The main idea was to develop a data processing chain that allows all
EARLINET stations to retrieve, in a fully automatic way, the aerosol
backscatter and extinction profiles starting from the raw lidar data
of the lidar systems they operate. The calculus subsystem of the SCC
is composed of two modules: a pre-processor module which handles the
raw lidar data and corrects them for instrumental effects and an optical
processing module for the retrieval of aerosol optical products from
the pre-processed data. All input parameters needed to perform the
lidar analysis are stored in a database to keep track of all changes which may occur for any
EARLINET lidar system over the time. The two calculus modules are coordinated and synchronized by an additional module (daemon)
which makes the whole analysis process fully automatic. The end user
can interact with the SCC via a user-friendly web interface.
All SCC modules are developed using open-source and freely available
software packages.
The final products retrieved by the SCC fulfill all requirements of the EARLINET quality assurance
programs on both instrumental and algorithm levels. Moreover, the
manpower needed to provide aerosol optical products is greatly reduced
and thus the near-real-time availability of lidar data is improved.
The high-quality of the SCC products is proven by the good
agreement between the SCC analysis, and the corresponding independent manual
retrievals. Finally, the ability of the SCC to provide high-quality
aerosol optical products is demonstrated for an EARLINET intense
observation period. |
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