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CSES Mission

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CSES Mission

CSES (China Seismo-Electromagnetic Satellite), or Zhangheng, is a Chinese–Italian space mission dedicated to monitoring electromagnetic field and waves, plasma parameters and particle fluxes induced by natural sources and artificial emitters in the near-Earth space. Austria contributes to one of the magnetometers.

The mission aims to study the existence of possible (temporal and spatial) correlations between the observation of iono-magnetospheric perturbations as well as precipitation of particles from the inner Van Allen belts and the occurrence of seismic events. However, a careful analysis is needed in order to distinguish measurements possibly associated to earthquakes from the large background generated in the geomagnetic cavity by the solar activity and the tropospheric electromagnetic emissions.

CSES mission will investigate the structure and the dynamics of the topside ionosphere, the coupling mechanisms between upper atmosphere, ionosphere and magnetosphere and the temporal variations of the geomagnetic field, in quiet and disturbed conditions. Data collected by the mission will also allow to studying solar-terrestrial interactions and phenomena of solar physics, namely Coronal Mass Ejections (CMEs), solar flares and cosmic ray solar modulation. The mission will contribute to develop an observational sharing service for the international cooperation and the scientific community.

The mission is part of a collaboration program between the China National Space Administration (CNSA) and the Italian Space Agency (ASI). It is the result of joint studies between Chinese researchers of China Earthquake Administration (CEA), led by Professor Xuhui Shen, and Italian researchers of National Institute for Nuclear Physics (INFN) and other Institutes and Universities, led by Professor Roberto Battiston.

The Chinese institutes involved in the project are the China National Space Administration (CNSA), the China Earthquake Administration (CEA), the Lanzhou Institute of Physics (LIP), the Institute of Crustal Dynamics (ICD-CEA), the Institute of High Energy Physics (IHEP), the National Space Science Center (NSSC), the Centre for Space Science and Applied Research-Chinese Academy of Science (CSSAR-CAS), the Space Star Technology Co. and the DFH Satellite Co.

Italy participates to the CSES mission with the Limadou project, led by Prof. Piergiorgio Picozza (Principal Investigator), funded by the Italian Space Agency (ASI) and the National Institute for Nuclear Physics (INFN). The Limadou Collaboration includes the INFN Divisions of Bologna, Naples, Perugia, Roma Tor Vergata, the INFN Center TIFPA of Trento, the INFN National Laboratories of Frascati, the Universities of Bologna, Trento, Roma Tor Vergata, Uninettuno and the Institutes INAF-IAPS (Italian National Institute of Astrophysics and Planetology) and INGV (Italian National Institute of Geophysics and Volcanology).

The LIMADOU Collaboration has designed, built and tested the High Energy Particle Detector (HEPD) of the CSES mission, conceived for optimizing detection of energetic charged particles precipitating from the inner Van Allen belts (as a result of seismic and non-seismic electromagnetic perturbations); it has collaborated in developing and testing the Electronic Field Detector (EFD) in the INAF-IAPS plasma chamber in Rome, and it participates in the data analysis of all payloads of the CSES mission.

CSES is a 3-axes stabilized satellite, based on the Chinese CAST2000 platform, with a mass of about 730 kg and a peak of power consumption of about 900 W. Scientific data will be transmitted in X-band at 120 Mbit/s. The orbit is circular Sun-synchronous, at an altitude of about 500 km, an inclination of about 98°, and descending node at 14:00 LT.

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