GEO-X (GEOspace X-ray imager)

GEO-X team

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    5 Citations (Scopus)


    GEO-X (GEOspace X-ray imager) is a 50 kg-class small satellite to image the global Earth's magnetosphere in X-rays via solar wind charge exchange emission. A 12U CubeSat will be injected into an elliptical orbit with an apogee distance of ∼40 Earth radii. In order to observe the diffuse soft X-ray emission in 0.3-2 keV and to verify X-ray imaging of the dayside structures of the magnetosphere such as cusps, magnetosheaths and magnetopauses which are identified statistically by in-situ satellite observations, an original light-weight X-ray imaging spectrometer (∼10 kg, ∼10 W, ∼10×10×30 cm) will be carried. The payload is composed of a ultra light-weight MEMS Wolter type-I telescope (∼4×4 deg2 FOV, <10 arcmin resolution) and a high speed CMOS sensor with a thin optical blocking filter (∼2×2 cm2, frame rate ∼20 ms, energy resolution <80 eV FWHM at 0.6 keV). An aimed launch year is 2023-25 corresponding to the 25th solar maximum.

    Original languageEnglish
    Title of host publicationSpace Telescopes and Instrumentation 2020
    Subtitle of host publicationUltraviolet to Gamma Ray
    EditorsJan-Willem A. den Herder, Shouleh Nikzad, Kazuhiro Nakazawa
    ISBN (Electronic)9781510636750
    Publication statusPublished - 2020
    EventSpace Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray - Virtual, Online, United States
    Duration: Dec 14 2020Dec 18 2020

    Publication series

    NameProceedings of SPIE - The International Society for Optical Engineering
    ISSN (Print)0277-786X
    ISSN (Electronic)1996-756X


    ConferenceSpace Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray
    Country/TerritoryUnited States
    CityVirtual, Online

    All Science Journal Classification (ASJC) codes

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Computer Science Applications
    • Applied Mathematics
    • Electrical and Electronic Engineering


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