Day 4

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Paper title Observation of O2 atmospheric A-band emission for temperature derivation in the mesosphere and lower thermosphere
  1. Konstantin Ntokas Forschungszentrum Juelich Speaker
  2. Martin Kaufmann
  3. Jörn Ungermann Forschungszentrum Juelich GmbH
  4. Friedhelm Olschewski University of Wuppertal
  5. Qiuyu Chen Research Center Juelich
  6. Oliver Wroblowski Research Center Juelich
  7. Qiucheng Gong Institute of Energy and Climate Research (IEK-7)
  8. Marco Miebach University of Wuppertal
  9. Tobias Augspurger Research Center Juelich
  10. Tom Neubert Forschungszentrum Juelich, Elektronik und Analytik-Systeme der Elektronik
  11. Martin Riese Forschungszentrum Jülich GmbH
Form of presentation Poster
  • B7. NewSpace missions
    • B7.03 New Space missions with small and nanosatellites
Abstract text Gravity waves are important for atmospheric dynamics and play a major role in the mesosphere and lower thermosphere (MLT). Thus, global observations of gravity waves in this region are of particular interest. To resolve the upward propagation, a limb sounding observing system with high vertical resolution is developed to retrieve vertical temperature profiles in the MLT region. The derived temperature fields can be subsequently used to determine wave parameters.

The measurement method is a variant of Fourier transform spectroscopy: a spatial heterodyne interferometer is used to resolve rotational structures of the O$_2$ atmospheric A-band airglow emission in the near-infrared. It is visible during day- and night-time, allowing a continuous observation. The image is taken by a 2d detector plane containing of hundreds of pixels on one axis. The horizontal axis contains the interference pattern. The vertical axis corresponds to different tangent altitudes. Thus, it allows to resolve a vertical profile with one image. The method exploits the relative intensities of the emission lines to retrieve temperature. Thus, no absolute radiometric calibration is needed, which facilitates the calibration of the instrument. Silicon-based detectors, like CCD or CMOS, can be used. These can operate in ambient conditions and do not require active cooling devices. This allows to deploy this instrument on a nano or micro satellite platform such as CubeSats.

After a successful in-orbit demonstration of the measurement technology in 2018, this instrument will be developed next within the International Satellite Program in Research and Education (INSPIRE). The European Commission has preselected the instrument for an in-orbit validation to demonstrate innovative space technologies within its H2020 program.