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Discussion papers
https://doi.org/10.5194/angeo-2019-76
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-2019-76
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Regular paper 19 Jun 2019

Regular paper | 19 Jun 2019

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This discussion paper is a preprint. It is a manuscript under review for the journal Annales Geophysicae (ANGEO).

Comparison of CSES ionospheric RO data with COSMIC measurements

Xiuying Wang1, Wanli Cheng2, Zihan Zhou1, Song Xu1, Dehe Yang1, and Jing Cui1 Xiuying Wang et al.
  • 1Institute of Crustal Dynamics, China EarthquakeAdministration, Beijing, China
  • 2Xinyang Station, Henan Earthquake Administration, Henan, China

Abstract. CSES is a newly launched electric-magnetic satellite in China; its main scientific objective is to monitor earthquake related disturbances in ionosphere. A GNSS occultation receiver (GOR) is installed on the satellite to inverse electron density related parameters. In order to validate the radio occultation (RO) data from GOR onboard CSES, a comparison between CSES RO and the co-located COSMIC RO data is conducted to check the consistency and reliability of the CSES RO data using measurements from February 12, 2018 to March 31, 2019. CSES RO peak values (NmF2), peak heights (hmF2), and electron density profiles (EPDs) are compared with corresponding COSMIC measurements in this study. The results show that: (1) NmF2s between CSES and COSMIC are in extremely good agreement with a correlation coefficient of 0.9891. The near zero bias between the two sets is 0.01235 × 105/cm3 with a RMSE of 0.3680 × 105/cm3; and the relative bias is 2.14 % with a relative RMSE of 16.40%, which are in accordance with previous studies according to error propagation rules. (2) hmF2s between the two missions are also in very good agreement with a correlation coefficient of 0.9379; the mean difference between the two sets is 0.73 km with a RMSE of 13.02 km, which is within the error limits of previous studies; (3) Co-located EDPs between the two sets are generally in good agreements, but with a better agreement for data above 200 km than that below this altitude. Data at the peak height ranges show the best agreement, and then data above the peak regions; data below the peak regions, especially at the altitude of about the E layer, show relatively large fluctuations. It is concluded that CSES RO data are in good agreement with COSMIC measurements, and the CSES RO data are applicable for most ionospheric-related studies. However, particular attention should be paid to EDP data below peak regions in application.

Xiuying Wang et al.
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Short summary
In order to validate the CSES ionospheric RO data, ionospheric peak values, peak heights and electron density profiles observed by CSES are compared with the corresponding COSMIC RO measurements obtained from February 12, 2018 to March 31, 2019. The results show the two sets are in good agreements, and CSES ionospheric RO data are available for ionospheric related studies considering the extensive validation and application of COSMIC RO data.
In order to validate the CSES ionospheric RO data, ionospheric peak values, peak heights and...
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