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Study of ionospheric responses over China during September 7–8, 2017 using GPS, Beidou (GEO), and Swarm satellite observations

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Abstract

The ionospheric responses over China during the geomagnetic storm on September 7–8, 2017 are investigated by using the Global Positioning System (GPS) observations from the Crustal Movement Observation Network of China (CMONOC), the geostationary earth orbit (GEO) satellite observations of BeiDou Navigation Satellite System (BDS) from the IGS Multi-GNSS experiment (MGEX), ionosonde data and Swarm satellite observations. We analyze the vertical TEC (VTEC) variation with a time resolution of 30 s and find that the daytime VTEC shows an enhancement and a positive ionospheric response during the first storm on September 8 over low mid-latitude regions. The critical frequency (\(foF_{2}\)) also presents positive deviations during the first storm over mid-latitude areas. In addition, the intense perturbations of the \(foF_{2}\) from station SANY and the GEO VTEC from stations LHAZ and CMUM effectively detect the presence of the traveling ionospheric disturbances (TIDs) during the second storm period. Also, a dense station network observed both equatorward and poleward large-scale TIDs in the southwest of China on the night of September 8. The variation of the electron density Ne from the Swarm A and C satellites verifies the occurrence of these LSTIDs over China. In addition, the auroral oval boundary from DMSP/SSUSI data and the horizontal component of the earth’s magnetic field from magnetometers are used to analyze the possible links with these LSTIDs during this geomagnetic storm.

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Data availability

The MGEX data were obtained from the IGS (ftp://cddis.gsfc.nasa.gov/pub/gps/data/campaign/mgex), the GPS data from CMONOC, the OMNI data from the GSFC/SPDF OMNIWeb interface (http://omniweb.gsfc.nasa.gov), the ionosondes data from GIRODidbase (https://ulcar.uml.edu/), the magnetometer data from Beijing National Observatory of Space Environment (http://wdc.geophys.ac.cn), the Swarm satellite data from the European Space Agency (http://earth.esa.int/Swarm), and the auroral oval boundary from DMSP/SSUSI data (https://ssusi.jhuapl.edu/).

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Acknowledgements

This work is supported by the National Natural Science Foundation of China (41761089). We acknowledge IGS for providing MGEX data, GIRODidbase for providing ionosonde data, Beijing National Observatory of Space Environment for providing magnetometer data, OMNIWeb for providing OMNI data, European Space Agency for providing Swarm satellite data, and Johns Hopkins University for providing DMSP/SSUSI data.

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Correspondence to Jun Tang.

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Tang, J., Gao, X., Li, Y. et al. Study of ionospheric responses over China during September 7–8, 2017 using GPS, Beidou (GEO), and Swarm satellite observations. GPS Solut 26, 55 (2022). https://doi.org/10.1007/s10291-022-01244-0

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  • DOI: https://doi.org/10.1007/s10291-022-01244-0

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