We present the first electron time-of-flight measurements obtained with the Electron Drift Instrument (EDI) on Equator-S.These measurements are made possible by amplitude-modulation and coding of the emitted electron beams and correlation with the signal from the OMEGA-PRO HIGH EPA 5:1 returning electrons.The purpose of the time-of-flight measurements is twofold.
First, they provide the drift velocity, and thus the electric field, when the distance the electrons drift in a gyro period becomes sufficiently large.Second, they provide the gyro time of the electrons emitted by the instrument, and thus the magnitude of the ambient magnetic field, allowing in-flight calibration of the flux-gate magnetometer with Battery Powered Welder high precision.Results of both applications are discussed.
Key words.Magnetospheric physics (electric fields; plasma convection; instruments and techniques).