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Discussion papers
https://doi.org/10.5194/essd-2018-135
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/essd-2018-135
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Review article 16 Nov 2018

Review article | 16 Nov 2018

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Earth System Science Data (ESSD).

Atmospheric data set from the Geodetic Observatory Wettzell during the CONT-17 VLBI campaign

Thomas Klügel, Armin Böer, Torben Schüler, and Walter Schwarz Thomas Klügel et al.
  • Federal Agency for Cartography and Geodesy, Geodetic Observatory Wettzell, 93444 Bad Kötzting, Germany

Abstract. Continuous Very Long Baseline Interferometry (VLBI) observations are designed to obtain highly accurate data for detailed studies of high frequency Earth rotation variations, reference frame stability and daily to sub-daily site motions. During the CONT-17 campaign that covered a time span of 15 days between Nov. 28 and Dec. 12, 2017, a comprehensive data set of atmospheric observations and weather model data were acquired at the Geodetic Observatory Wettzell, where three radio telescopes contributed to three different networks which have been established for this campaign. The data set is made available to all the interested users in order to provide an optimal data base for the analysis and interpretation of the CONT-17 VLBI data. In addition, it is an outstanding data set for validation and comparison of tropospheric parameters resulting from different space techniques with regard to the establishment of a common atmosphere at co-location sites.

The regularly recorded atmospheric parameters comprise all meteorological quantities (pressure, temperature, humidity, wind, radiation, precipitation) taken from the local meteo station close to the surface, solar radiation intensity, temperatures up to 1000m above the surface from a temperature profiler, total vapour and liquid water content from a water vapour radiometer, and cloud coverage and -temperatures from a nubiscope. Additionally, vertical profiles of pressure, temperature and humidity from radiosonde balloons and from numerical weather models were used for comparison and validation.

The graphical representation and comparison show a good correlation in general, but also some disagreements at special weather situations. While the accuracy, the temporal and spatial resolution of the individual data sets is very different, the data as a whole characterize comprehensively the atmospheric conditions around Wettzell during the CONT-17 campaign and represent a sound basis for further investigations (https://doi.pangaea.de/10.1594/PANGAEA.895518).

Thomas Klügel et al.
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Thomas Klügel et al.
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Atmospheric measurements from the Geodetic Observatory Wettzell during the CONT-17 VLBI campaign (Nov 2017 - Dec 2017) T. Klügel, A. Böer, T. Schüler, and W. Schwarz https://doi.pangaea.de/10.1594/PANGAEA.895518

Thomas Klügel et al.
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Short summary
Radiointerferometry on very long baselines (VLBI) is an important technique for detailed studies of Earth rotation variations. However, radio waves undergo significant delay in the atmosphere. In order to provide an optimal data base for the analysis of the last continuous VLBI campaign between Nov. 28 and Dec. 12, 2017, all available meteorological observations and model data were compiled forming an outstanding data set of the atmospheric conditions around the Geodetic Observatory Wettzell.
Radiointerferometry on very long baselines (VLBI) is an important technique for detailed studies...
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