Atmospheric Measurement Techniques
Atmospheric Measurement Techniques
AMT
Articles | Volume 19, issue 7
Articles | Volume 19, issue 7
https://doi.org/10.5194/amt-19-2479-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/amt-19-2479-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 19, issue 7
Research article
 | 
15 Apr 2026
Research article |  | 15 Apr 2026

Experiments with a large number of GNSS-RO observations through the ROMEX collaboration in the Met Office NWP system

Neill E. Bowler and Owen Lewis

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Short summary
We test the impact of a big increase in the number of radio occultation observations being used in the Met Office's weather forecast system, since idealised studies showed benefit even with very large increases. Initial tests indicated that this degraded forecast performance, due to biases in the modelling of the observations. Correcting those biases led to the system showing improved forecast performance with the extra observations. The largest improvements were in the southern extra-tropics.
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The Radio Occultation Modeling EXperiment (ROMEX): observational...