Articles | Volume 9, issue 2
https://doi.org/10.5194/amt-9-335-2016
https://doi.org/10.5194/amt-9-335-2016
Research article
 | 
03 Feb 2016
Research article |  | 03 Feb 2016

Ionospheric correction of GPS radio occultation data in the troposphere

Z. Zeng, S. Sokolovskiy, W. Schreiner, D. Hunt, J. Lin, and Y.-H. Kuo

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Short summary
This study discusses the ionospheric correction problem of RO data in the troposphere and investigates an optimal transition height (OTH) for replacing the standard linear combination method by the L1–L2 bending angle extrapolated from above. By comparing the RO ionosphere-free bending angles with the ECMWF global forecast ones, the OTH is found when it gives the minimal standard deviations. The results show the OTH depends mainly on the L2 signal and is ~20 km for COSMIC L2P and ~10 km for L2C.