Day 4

Detailed paper information

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Paper title THEIA - Miniaturised Multispectral Imager with On-board Calibration
  1. Hendrik Ehrpais University of Tartu
  2. Joosep Kivastik University of Tartu
  3. Silvar Muru University of Tartu
  4. Meelis Pihlap University of Tartu
  5. Mathias Plans University of Tartu
  6. Christine Sams National Oceanography Centre Speaker
  7. Karin Pai University of Tartu
Form of presentation Poster
  • B7. NewSpace missions
    • B7.03 New Space missions with small and nanosatellites
Abstract text There is a growing interest in miniaturised lightweight coste-effective scientific-grade multi-spectral imagers for high radiation environments on low-Earth orbit. Over the past decade numerous CubeSat cameras have been launched both on experimental student satellites as well as on operational constellations of Earth Observation CubeSats. These instruments have primarily been designed for recording visually good-looking images without any particular emphasis on the radiometric quality of the data.

We are presenting THEIA, an Earth Observation Imager being developed by the University of Tartu, capable of providing scientific-grade data suitable for quantitative remote sensing studies. It makes use of two sensors and optical beam splitting technology to separate two spectral bands. It is able to deliver radiometrically calibrated imagery thanks to an on-board calibration unit, thus offering the possibility to provide complementary data to large Earth Observation missions such as Sentinel-2.

THEIA can be used on small standardised CubeSats and up to satellites with any size and shape, is radiometrically calibrated and applicable for quantitative remote sensing. It can also be used on manned/unmanned aerial vehicles where miniaturisation helps to save mass and volume.

The imager is designed in cooperation with ESA under the Industry Incentive Scheme and the General Support Technology Programme.