Journal cover Journal topic
Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union

Journal metrics

  • IF value: 3.089 IF 3.089
  • IF 5-year<br/> value: 3.700 IF 5-year
    3.700
  • CiteScore<br/> value: 3.59 CiteScore
    3.59
  • SNIP value: 1.273 SNIP 1.273
  • SJR value: 2.026 SJR 2.026
  • IPP value: 3.082 IPP 3.082
  • h5-index value: 45 h5-index 45
https://doi.org/10.5194/amt-2017-225
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article
07 Jul 2017
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Measurement Techniques (AMT).
Quality Aspects of the Wegener Center Multi-Satellite GPS Radio Occultation Record OPSv5.6
Barbara Angerer1,2, Florian Ladstädter1,2, Barbara Scherllin-Pirscher3, Marc Schwärz1,2, Andrea K. Steiner1,2, Ulrich Foelsche2,1, and Gottfried Kirchengast1,2 1Wegener Center for Climate and Global Change (WEGC), University of Graz, Graz, Austria
2Institute for Geophysics, Astrophysics, and Meteorology/Institute of Physics, University of Graz, Graz, Austria
3Zentralanstalt für Meteorologie und Geodynamik (ZAMG), Vienna, Austria
Abstract. The demand for high-quality atmospheric data records, applicable in climate studies, is undisputed. Using such records requires knowledge of the quality and the specific characteristics of all contained data sources. The latest version of the Wegener Center (WEGC) multi-satellite GPS radio occultation (RO) record, OPSv5.6, provides globally distributed upper-air satellite data of high quality, usable for climate and other high-accuracy applications. The GPS RO technique has been deployed in several satellite missions since 2001. Consistency among data from these missions is essential to create a homogeneous long-term multi-satellite climate record. In order to enable a qualified usage of the WEGC OPSv5.6 dataset we performed a detailed analysis of satellite dependent quality aspects from 2001 to 2016. We present the impact of the OPSv5.6 quality control on the processed data and reveal time-dependent and satellite specific quality characteristics. Highest quality is found for MetOp (Meteorological Operational satellite) and GRACE (Gravity Recovery and Climate Experiment). Also data from Formosat-3/COSMIC (Formosa Satellite mission-3/Constellation Observing System for Meteorology, Ionosphere, and Climate) are of high quality, however comparatively large day-to-day variations and satellite dependent irregularities need to be taken into account when using these data. We validate the consistency among the various satellite missions by calculating monthly mean temperature deviations from the multi-satellite mean, inducing also a correction for the different sampling characteristics. The results are highly consistent in the altitude range from 8 km to 25 km with mean temperature deviations less than 0.1 K. At higher altitudes the OPSv5.6 RO temperature record is increasingly influenced by the characteristics of the bending angle initialization, with the amount of impact depending on the receiver quality.

Citation: Angerer, B., Ladstädter, F., Scherllin-Pirscher, B., Schwärz, M., Steiner, A. K., Foelsche, U., and Kirchengast, G.: Quality Aspects of the Wegener Center Multi-Satellite GPS Radio Occultation Record OPSv5.6, Atmos. Meas. Tech. Discuss., https://doi.org/10.5194/amt-2017-225, in review, 2017.
Barbara Angerer et al.
Barbara Angerer et al.
Barbara Angerer et al.

Viewed

Total article views: 206 (including HTML, PDF, and XML)

HTML PDF XML Total BibTeX EndNote
158 45 3 206 5 2

Views and downloads (calculated since 07 Jul 2017)

Cumulative views and downloads (calculated since 07 Jul 2017)

Viewed (geographical distribution)

Total article views: 206 (including HTML, PDF, and XML)

Thereof 203 with geography defined and 3 with unknown origin.

Country # Views %
  • 1

Saved

Discussed

Latest update: 23 Sep 2017
Publications Copernicus
Download
Short summary
In this paper we present a detailed analysis of the GPS Radio Occultation (RO) data from several satellite missions used in the Wegener Center Occultation Processing System version 5.6 (OPSv5.6). Data quality and consistency is essential if data from different missions will be combined to a homogeneous long-term multi-satellite climate record. We find temperature data from different satellites highly consistent between 8 km to 25 km, with deviations from the satellite mean of less than 0.1 K.
In this paper we present a detailed analysis of the GPS Radio Occultation (RO) data from several...
Share