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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
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Volume 8, issue 3
Atmos. Meas. Tech., 8, 1275–1285, 2015
https://doi.org/10.5194/amt-8-1275-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: Observing Atmosphere and Climate with Occultation Techniques...

Atmos. Meas. Tech., 8, 1275–1285, 2015
https://doi.org/10.5194/amt-8-1275-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 16 Mar 2015

Research article | 16 Mar 2015

Implementation of a quality control for radio occultation observations in the presence of large gradients of atmospheric refractivity

L. Cucurull1,2 L. Cucurull
  • 1NOAA ESRL Global Systems Division, Boulder, CO, USA
  • 2Cooperative Institute for Research in Environmental Sciences, Boulder, CO, USA

Abstract. In preparation for the launch of the first six satellites of the COSMIC-2 mission in equatorial orbit, and the larger number of observations that such a mission will provide in the lower tropical troposphere, work is underway at the National Oceanic and Atmospheric Administration (NOAA) to improve the assimilation of radio occultation (RO) observations, particularly in the lower tropical troposphere. As part of the improvement of the bending angle forward operator at the National Centers for Environmental Prediction (NCEP), additional quality controls aimed to detect and reject observations that might have been affected by super-refraction conditions have been implemented and tested. The updated quality control procedures also address the situation where the model detects atmospheric super-refraction conditions. This paper describes the limitations of the current standard quality controls and discusses the implementation of additional quality control procedures to address the limitations of assimilating observations likely affected by the super-refraction conditions, either in the model simulation or in the retrieval process.

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In preparation for the launch of the first six satellites of the COSMIC-2 mission in equatorial orbit, and the larger number of observations that such a mission will provide in the lower tropical troposphere, work is underway at NOAA to improve the assimilation of RO observations. This paper describes the limitations of the current standard quality controls for RO data and discusses the implementation of additional quality control procedures.
In preparation for the launch of the first six satellites of the COSMIC-2 mission in equatorial...
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