FIELD: optics.
SUBSTANCE: invention relates to optical tomography, cosmic ray physics and can be used to determine the three-dimensional distribution functions of various parameters of low-temperature plasma induced by a gas discharge around the object under study under the influence of cosmic factors on near-earth orbits. Object of study can be a biological object, a structural, semiconductor element, a sample of liquid lubricant. Device is a few view optical tomography system and consists of a module for collecting and processing initial projection data located on board the nanosatellite and a computation module located on the Earth. On the nanosatellite, the original 2D projections are converted from the Cartesian grid to the polar one and the data is truncated to the required format. On the Earth, the missing projections are determined using interpolation procedures using ring harmonics, and the distributions in parallel planes are reconstructed using the method of reverse projection with filtering (convolution in the time domain). Resulting three-dimensional distributions are displayed as stereoscopic images of their isoparametric surfaces.
EFFECT: ability to restore the three-dimensional distribution of the parameters of the induced plasma.
1 cl, 4 dwg
