Articles | Volume 8, issue 1
Atmos. Meas. Tech., 8, 171–182, 2015
https://doi.org/10.5194/amt-8-171-2015

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

Atmos. Meas. Tech., 8, 171–182, 2015
https://doi.org/10.5194/amt-8-171-2015

Research article 12 Jan 2015

Research article | 12 Jan 2015

Ionospheric assimilation of radio occultation and ground-based GPS data using non-stationary background model error covariance

C. Y. Lin et al.

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Short summary
This study presents a new approach to assimilate FORMOSAT-3/COSMIC radio occultation (RO) slant total electron content (TEC) data as well as ground-based GPS slant TEC data into the International Reference Ionosphere to reconstruct 3-D ionospheric election density structure. Our new ionospheric data assimilation model that employs the location-dependent background model error covariance outperforms the earlier assimilation model with the location-independent background model error covariance.