Annales Geophysicae
Annales Geophysicae
ANGEO
Articles | Volume 36, issue 4
Articles | Volume 36, issue 4
https://doi.org/10.5194/angeo-36-969-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-36-969-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 36, issue 4
Regular paper
 | 
09 Jul 2018
Regular paper |  | 09 Jul 2018

Assessing water vapor tomography in Hong Kong with improved vertical and horizontal constraints

Pengfei Xia, Shirong Ye, Peng Jiang, Lin Pan, and Min Guo

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Cited articles

Bevis, M., Businger, S., Herring, T., Rocken, C., Anthes, R., and Ware, R.: GPS meteorology: Remote sensing of atmospheric water vapor using the global positioning system, J. Geophys. Res., 94, 15787–15801, 1992. 
Bevis, M., Businger, S., Chiswell, S., Herring, T. A., Anthes, R. A., Rochen, C., and Ware, R. H.: GPS Meteorology: Mapping zenith wet delays onto precipitable water, J. Appl. Meteorol., 33, 379–386, 1994. 
Beyerle, G., Schmidt, T., and Michalak, G.: GPS Radio Occultation with GRACE: Atmospheric profiling utilizing the zero difference technique, Geophys. Res. Lett., 32, L1386, https://doi.org/10.1029/2005GL023109, 2005. 
CDAAC: Algorithms for inverting Radio Occultation signals in the neutral atmosphere, COSMIC Project Office, University Corporation for Atmospheric Research, available at: http://cosmic-io.cosmic.ucar.edu/cdaac/doc index.html (last access: 20 October 2017), 2005. 
CDAAC: COSMIC Radio Occultation data, available at: http://cosmic-io.cosmic.ucar.edu/cdaac/index.html, last access: 20 October 2017. 
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Short summary
We proposed a new method to determine the scale height of water vapor, which will improve the quality of vertical constraints. Then, the smoothing factor in the horizontal constraint was determined based on ERA-Interim products. The evaluation results show that the water vapor density quality obtained by the optimized technique is 13.8 % better below 3.8 km and 8.1 % better above 3.8 km than that obtained by the traditional technique.
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