Prelude Satellite

Satellite PRELUDE (Precursory electric field observation CubeSat demonstrator)
Spacecraft type CubeSat
Units or mass 6U
Status not launched, expected in 2025
Launcher Epsilon, ?
Organization Nihon University
Institution University
Entity Academic / Education
Nation Japan
Partners University of Shizuoka, Shizuoka Prefectural University

Aiming at elucidation of the precursory mechanism of earthquake, and the development situation of hybrid sensor (electric field and plasma measurement).


The Prelude satellite acquires VLF band signals affected by ionospheric fluctuations, which are considered to be a promising precursor to earthquakes. In addition, the satellite is equipped with a GNSS receiver to observe the total number of electrons in the ionosphere in order to observe the increase in electron density, which is considered to be one of the mechanisms of ionospheric fluctuations.

We are developing a CubeSat, to elucidate the mechanism of precursor phenomena of earthquakes through satellite observations and to conduct tight-lattice observations in the future. The CubeSat is a 6U size satellite, which is specialized to observe only the signal strength analysis of ionospheric fluctuation and TEC information to know the ionospheric condition, while the conventional satellites, DEMETER and China's CSES, are larger than 100 kg.

This satellite observes the signal intensity of VLF band and electron density and electron temperature on the orbit in the solar synchronous quasi-regression orbit at 500 ~ 700 km altitude. The deviation of the charge distribution caused by the penetration of the electromagnetic wave causes the electric field. And, since the mass of electron and ion is different, there is a case in which the charge deviation occurs in the plasma

Sources [1] [2] [3]
Photo sources [1] [2]
Keywords Earthquake ELF prediction

Last modified: 2024-05-29

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