Automatic quality control of telemetric rain gauge data providing quantitative quality information (RainGaugeQC)
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Published:2022-10-04
Issue:19
Volume:15
Page:5581-5597
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ISSN:1867-8548
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Container-title:Atmospheric Measurement Techniques
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language:en
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Short-container-title:Atmos. Meas. Tech.
Author:
Ośródka Katarzyna, Otop Irena, Szturc JanORCID
Abstract
Abstract. The RainGaugeQC scheme described in this paper is
intended for real-time quality control of telemetric rain gauge data. It
consists of several checks: detection of exceedance of the natural limit and
climate-based threshold as well as checking of the conformity of rain gauge and
radar observations, the consistency of time series from heated and unheated
sensors, and the spatial consistency of adjacent gauges. The proposed
approach is focused on assessing the reliability of individual rain gauge
observations. A quantitative indicator of reliability, called the quality
index (QI), describes the quality of each measurement as a number in the range
from 0.0 (completely unreliable measurement) to 1.0 (perfect measurement).
The QI of a measurement which fails any check is lowered, and only a
measurement very likely to be erroneous is replaced with a “no data”
value. The performance of this scheme has been evaluated by analysing the
spatial distribution of the precipitation field and comparing it with
precipitation observations and estimates provided by other techniques. The
effectiveness of the RainGaugeQC scheme was also analysed in terms of the
statistics of QI reduction. The quality information provided is very useful in
further applications of rain gauge data. The scheme is used operationally by
the Polish national meteorological and hydrological service (Institute of
Meteorology and Water Management – National Research Institute).
Publisher
Copernicus GmbH
Subject
Atmospheric Science
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