Atmospheric Measurement Techniques
Atmospheric Measurement Techniques
AMT
Articles | Volume 19, issue 15
Articles | Volume 19, issue 15
https://doi.org/10.5194/amt-19-5135-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/amt-19-5135-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 19, issue 15
Research article
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07 Aug 2026
Research article | Highlight paper |  | 07 Aug 2026

An update to the expression of atmospheric refractivity for GNSS signals

Josep M. Aparicio

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Latest update: 07 Aug 2026
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Editorial statement
This paper has the potential of being a classic paper on the atmospheric refractivity equation as a function of many atmospheric variable. This relationship is of potential great use in studies requiring extremely accurate equations for atmospheric refractivity. The paper is likely to be read and cited by many scientists.
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Short summary
Refinement of previous work on atmospheric refractivity, providing an expression as a function of air density, temperature, and composition. Studies with radio occultations in weather prediction show that the formulation of refractivity is critical with large data volumes. Compared to earlier work, this study incorporates updated fundamental measurements, accounts for variability in atmospheric composition, and extends the model to include hydrometeors.
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The Radio Occultation Modeling EXperiment (ROMEX): observational...