Preliminary validation of in situ electron density measurements onboard CSES using observations from Swarm Satellites

Wang, Xiuying; Cheng, Wan-Li; Yang, Dehe; Liu, Dapeng

doi:10.1016/j.asr.2019.05.025

Cited by 25 publications

(23 citation statements)

References 38 publications

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“…To characterize ionospheric irregularities and fluctuations, we used the rate of change of electron density index (RODI; specifications about the calculation of this index can be found in Appendix A) estimated from the electron density measured by CSES. To understand how the presence of such irregularities could have affected navigation systems, we have also considered total electron content (TEC) values from Swarm to highlight a possible loss of lock, a condition under which a Global Positioning System (GPS) receiver no longer tracks the signal sent by the satellite, with a consequent degradation of the positioning accuracy (Jin and Oksavik, 2018;Xiong et al, 2018). Finally, we evaluated possible geomagnetically induced current (GIC) hazard related to the main phase of the August 2018 geomagnetic storm, calculating the GIC index (Marshall et al, 2010;Tozzi et al, 2019) over two geomagnetic quasi-longitudinal arrays located in the European-African and in the North American sectors.…”

Section: Introductionmentioning

confidence: 99%

From the Sun to Earth: effects of the 25 August 2018 geomagnetic storm

et al. 2020

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Abstract. On 25 August 2018 the interplanetary counterpart of the 20 August 2018 coronal mass ejection (CME) hit Earth, giving rise to a strong G3 geomagnetic storm. We present a description of the whole sequence of events from the Sun to the ground as well as a detailed analysis of the observed effects on Earth's environment by using a multi-instrumental approach. We studied the ICME (interplanetary-CME) propagation in interplanetary space up to the analysis of its effects in the magnetosphere, ionosphere and at ground level. To accomplish this task, we used ground- and space-collected data, including data from CSES (China Seismo-Electric Satellite), launched on 11 February 2018. We found a direct connection between the ICME impact point on the magnetopause and the pattern of Earth's auroral electrojets. Using the Tsyganenko TS04 model prevision, we were able to correctly identify the principal magnetospheric current system activating during the different phases of the geomagnetic storm. Moreover, we analysed the space weather effects associated with the 25 August 2018 solar event in terms of the evaluation of geomagnetically induced currents (GICs) and identification of possible GPS (Global Positioning System) losses of lock. We found that, despite the strong geomagnetic storm, no loss of lock had been detected. On the contrary, the GIC hazard was found to be potentially more dangerous than other past, more powerful solar events, such as the 2015 St Patrick's Day geomagnetic storm, especially at latitudes higher than 60∘ in the European sector.

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Section: Introductionmentioning

confidence: 99%

From the Sun to Earth: effects of the 25 August 2018 geomagnetic storm

et al. 2020

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“…The ionospheric plasma is often characterized by irregularities and fluctuations in the plasma density, especially during active solar conditions. In order to characterize such irregularities, we evaluated the RODI, a parameter derived from the electron density (see Appendix A) recorded by the CSES satellite (Wang et al, 2019). Figure 6 shows RODI values for August 25, 26, and 27, 2018, in which nighttime semi-orbits (around 02:00 LT) are shown separately from daytime semi-orbits (around 14:00 LT).…”

Section: Ionospheric Responsementioning

confidence: 99%

From the Sun to the Earth: August 25, 2018 geomagnetic storm effects

Piersanti

Michelis

Moro

et al. 2020

Preprint

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Abstract. On August 25, 2018 the interplanetary counterpart of the August 20, 2018 Coronal Mass Ejection (CME) hit the Earth, giving rise to a strong G3 geomagnetic storm. We present a description of the whole sequence of events from the Sun to the ground as well as a detailed analysis of the observed effects on the Earth's environment by using a multi instrumental approach. We studied the ICME propagation in the interplanetary space up to the analysis of its effects in the magnetosphere, ionosphere and at ground. To accomplish this task, we used ground and space collected data, including data from CSES (China Seismo Electric Satellite), launched on February 11, 2018. We found a direct connection between the ICME impact point onto the magnetopause and the pattern of the Earth's polar electrojects. Using the Tsyganenko TS04 model prevision, we were able to correctly identify the principal magnetospheric current system activating during the different phases of the geomagnetic storm. Moreover, we analyzed the space-weather effects associated with the August 25, 2018 solar event in terms of evaluation geomagnetically induced currents (GIC) and identification of possible GPS loss of lock. We found that, despite the strong geomagnetic storm, no loss of lock has been detected. On the contrary, the GIC hazard was found to be potentially more dangerous than other past, more powerful solar events, such as the St. Patrick geomagnetic storm, especially at latitudes higher than 60° in the European sector.

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“…Wang et al. (2019) compared the electron density (Ne) of CSES with that of Swarm satellites, and found the high consistency between the two datasets. While the time range of CSES data in their study just covers 7 months, also including in‐orbit testing phase.…”

Section: Introductionmentioning

confidence: 99%

“…In a word, although the Ne comparative analyses between CSES and other observations/models have been carried out by Wang et al. (2019) and Yan et al. (2020), the data analysis is also needed from different aspects, including different observations, long time data, and more regions.…”

Section: Introductionmentioning

confidence: 99%

“…In our study, in order to identify the data quality of electron density observed by CSES, model outputs and other observations are applied to carry out the comparative research, including the Detection of Electro‐Magnetic Emissions Transmitted from Earthquake Regions (DEMETER) satellite which is not used in the works of Wang et al. (2019) and Yan et al. (2020), Swarm constellation (including Swarm A, B, and C satellites) and international reference ionosphere (IRI) model.…”

Section: Introductionmentioning

confidence: 99%

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The Data Comparison of Electron Density Between CSES and DEMETER Satellite, Swarm Constellation and IRI Model

Liu

Guan

Zhang

et al. 2021

Earth and Space Science

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The China Seismo‐Electromagnetic Satellite (CSES), which is also called ZhangHeng‐1 (ZH‐1), was successfully launched on February 2, 2018. Evaluating the quality of observation data is imperative for the satellite mission and users. Through the comparative analysis of electron density between CSES and DEMETER satellite, Swarm constellation and international reference ionosphere (IRI) model from May 8, 2018 to December 31, 2019, it was found that the patterns of electron density for CSES are similar with those of other observations and model outputs, such as the maxima and minima nearly locating in the same place, having the ionospheric phenomena of wave number 3/4, electron density enhancements at mid‐latitude, and Weddell Sea Anomaly (WSA). The correlation coefficients are higher in the Southern Hemisphere, especially in the region of WSA. The correlation between CSES and IRI model is also better around the equatorial ionization anomaly crests during the daytime, while the correlation coefficients are low around the magnetic equator for the Ne single peak detected by CSES. Comparing the observation data in orbit during the same time, the correlation coefficients between CSES and Swarm constellation all exceed 0.75, the curves of nearby orbits exhibiting the consistent peaks or troughs around the roughly same latitudes. Nevertheless, there are systematic biases in the values between the electron density data of CSES and other observations/models, 1–2 times and over two times lower than IRI model during the nighttime and daytime, respectively. The electron density values of Swarm constellation are 3–6 times greater than those of CSES according to the data statistics of nearby orbits. We considered that both hardware design and data processing may potentially have effects on the Ne systematic biases between the CSES and other observations. Through the comparative analysis, it is concluded that the electron density observed by CSES can exhibit the ionospheric characteristics at the altitude of 507 km, and the data can be applied to the ionospheric phenomena study.

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Preliminary validation of in situ electron density measurements onboard CSES using observations from Swarm Satellites

Cited by 25 publications

References 38 publications

From the Sun to Earth: effects of the 25 August 2018 geomagnetic storm

From the Sun to Earth: effects of the 25 August 2018 geomagnetic storm

From the Sun to the Earth: August 25, 2018 geomagnetic storm effects

The Data Comparison of Electron Density Between CSES and DEMETER Satellite, Swarm Constellation and IRI Model

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