Speaker
Description
The miniaturized MiniPIX-Timepix3 Space radiation monitor is deployed in open space in LEO orbit onboard the OneWeb JoeySat (launched May 2023, initially at 600 km, currently at 1200 km polar orbit) to monitor and characterize the complex radiation field in the satellite environment. The pixel detector is implemented in miniaturized electronics MiniPix-Timepix3 Space (Advacam) of size 95 mm × 28 mm × 21 mm, mass ≈ 100 g (with casing) and power consumption ≈ 2 W. The MPX payload is controlled and readout by a computer board (Oledcomm) and interface to the JoeySat satellite SOCAN bus (OneWeb/Eutelsat). The detector operation and count rate were customized to achieve a quasi-continuous operation of about 1 min cadence within the limited payload maximum downlink data rate of 24 MB/day. Detailed and extensive radiation data are provided with particle counting imaging response with spectral-sensitive particle tracking along the satellite orbit with particle-type resolving power in wide range of radiation field intensity, particle energy distributions (energy loss) and directionality (wide field-of-view). Data products consist of particle fluxes and dose rates (total, partial), deposited energy distributions, linear-energy-transfer (LET) spectra and directional fluxes. Systematic detailed radiation maps are produced over extended periods. Particle-type specific and large gradients are observed in and around periods of solar/geomagnetic storm activity. Results will be presented over varying satellite orbit (600 km, transfer, 1200 km) as well as at periods of solar-geomagnetic activity.
Acknowledgements:
The Timepix3-MPX payload was procured and deployed by OneWeb contract.
