METHOD OF ACHIEVING DIFFRACTION LIMIT OF RESOLUTION OF IMAGES OF REMOTE PROBING OF EARTH FOR SMALL SPACECRAFTS Russian patent published in 2020 - IPC G01C11/02 B64G4/00 G02B7/02 

Abstract RU 2730886 C1

FIELD: instrument engineering.

SUBSTANCE: invention relates to space instrument-making of optoelectronic equipment (OEU). Method for achieving diffraction limit of resolution of Earth remote sensing images for small spacecrafts (ERS SS), wherein lens and digital detector of OEU are matched by Nyquist criterion and provide for achievement of diffraction limit of instrumental resolution of spacecraft ERS SS on terrain. To eliminate atmospheric distortions when obtaining remote ERS images, it is proposed to exclude time and frequency averaging of atmospheric distortions of light radiation, that in absence of spatial averaging {rO(λ,H) > D} enables to register statistically independent diffraction-limited short-exposure images of ERS, accidentally shifted and attenuated by atmosphere. To eliminate these atmospheric distortions when processing the registered series N of "instant" low-contrast images, high-quality images M are selected among them, rejecting washed-out and noisy images, a, while shifting and accumulating selected, compensate for atmospheric shifts and attenuation of images, obtaining high-contrast and high (diffraction) resolution panchromatic image of the probed portion of the earth's surface for various ERS tasks of ultrahigh resolution and multizone thematic processing.

EFFECT: technical result consists in providing the possibility of increasing contrast of ERS images in conditions of atmospheric distortions.

1 cl, 5 dwg, 1 tbl

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RU 2 730 886 C1

Authors

Sviridov Konstantin Nikolaevich

Tyulin Andrej Evgenevich

Gektin Yurij Mikhajlovich

Dates

2020-08-26Published

2019-10-04Filed