Tomographic data processing of ionosphere's emissions for airglow
reconstruction.
One of the task of "WARNING" mission is
spectrophotometric observations ionosphere's
emissions from satellite's board looking-for a heralds
of earthquakes. Imaging spectrophotometer FAGOT
based on the concept of a static field-widened
Michelson interferometer which used CCD camera.
Measurements will be producing by using scans of
Earth's limb in orbit plain of satellite. The defining
location and structure of airglow needs tomographic
processing of data of photometric measurements.
There is using Cormack inversion for tomographic
reconstruction of airglow. Both observed function of
column brightness and volume emission rate function
of airglow may be expanded in a Fourier series.
Inversion allows to obtain Fourier coefficients of
volume emission rate function from Fourier coefficients
of observed function of column brightness. There are
developed software and made numerical simulation for
tomographic data processing.
Some results
Below represented results of tomographic treatment of simulated airglow. In this case airglow has gaussian profiles on both
coordinates altitude and latitude. Observations of airglow were simulated in limited angle - 20 degrees along satellite track.
Total number of simulated observations is 320.
Fig. 1. Simulated airglow feature.
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Fig. 2. Reconstructed airglow.
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Fig. 3. Reconstructed airglow on 320 line integrals with
30% noise added.
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Fig. 3. Altitude profiles in center section.
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Alexander Konovalenko alex.kono@mailcity.com