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ISSN  2096-3955

CN  10-1502/P

Citation: Rui Yan, YiBing Guan, XuHui Shen, JianPing Huang, XueMin Zhang, Chao Liu, DaPeng Liu, 2018: The Langmuir Probe onboard CSES: data inversion analysis method and first results, Earth and Planetary Physics, 2, 479-488. doi: 10.26464/epp2018046

2018, 2(6): 479-488. doi: 10.26464/epp2018046


The Langmuir Probe onboard CSES: data inversion analysis method and first results


The Institute of Crustal Dynamics, China Earthquake Administration, Beijing 100085, China


National Space Science Center, China Earthquake Administration, Beijing 100190, China


The Institute of Earthquake Forecasting, China Earthquake Administration, Beijing 100036, China

Corresponding author: Rui Yan,

Received Date: 2018-08-18
Web Publishing Date: 2018-11-01

The Langmuir Probe (LAP), onboard the China Seismo-Electromagnetic Satellite (CSES), has been designed for in situ measurements of bulk parameters of the ionosphere plasma, the first Chinese application of in-situ measurement technology in the field of space exploration. The two main parameters measured by LAP are electron density and temperature. In this paper, a brief description of the LAP and its work mode are provided. Based on characteristics of the LAP, and assuming an ideal plasma environment, we introduce in detail a method used to invert the I-V curve; the data products that can be accessed by users are shown. Based on the LAP data available, this paper reports that events such as earthquakes and magnetic storms are preceded and followed by obvious abnormal changes. We suggest that LAP could provide a valuable data set for studies of space weather, seismic events, and the ionospheric environment.

Key words: Langmuir Probe (LAP), Current-Voltage (I-V) curve, electron density (Ne), electron temperature (Te)

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The Langmuir Probe onboard CSES: data inversion analysis method and first results

Rui Yan, YiBing Guan, XuHui Shen, JianPing Huang, XueMin Zhang, Chao Liu, DaPeng Liu