Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2024, Vol. 21, No. 1, pp. 163-171
Spectral adjustment of the illumination stand
K.V. Alatortsev
1 , O.A. Alatortseva
2 , S.G. Danilov
2 , V.L. Alatortsev
1 1 Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region, Russia
2 National Research University of Electronic Technology, Zelenograd, Moscow, Russia
Accepted: 29.12.2023
DOI: 10.21046/2070-7401-2024-21-1-163-171
Remote sensing of the Earth using spacecraft has been used for a long time. The basis for recording information is photodetector devices of the spacecraft based on charge-coupled devices using various forms of accumulation, including with time delay and accumulation of charge. The complexity of the equipment determines the requirements for pre-flight testing and calibration of satellite equipment. One of such verification procedures is the testing of remote sensing spacecraft photodetectors on various stands of uniform illumination of the focal plane, which allow testing, calibration and radiometric correction of the sensitivity of optoelectronic equipment (OEA) of the spacecraft. To solve these problems, it is necessary to be able to influence the spectral composition of the radiation of the uniform illumination stand, to set it distributed according to a given spectral distribution. This work is devoted to optimizing the setting of the bench equipment of uniform illumination to set the spectral composition of its radiation close to a given distribution over the spectrum. The illumination stand is adjusted based on the optimal choice of weight coefficients that allow the use of various spectral emitters of the stand with the required weights for adjusting the brightness of its radiation. The values of the weighting coefficients are obtained from solving the optimization problem of minimizing the functional difference between a given spectrum and the radiation spectrum of the stand formed by the composition of its LED components. The received spectral bench information is used in the subsequent configuration of the remote sensing spacecraft OEA, its radiometric calibration and in other areas of space instrumentation and remote sensing.
Keywords: spacecraft, remote sensing of Earth, stand of uniform flare, optical-electronic equipment, calibration
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