The results of experimental studies for spatial spectra of an atmospheric background inhomogeneities fragment in the long-wave infrared range (LWIR) are presented. The results of studies for the atmospheric background radiation inhomogeneities, depending on their angular size, made it possible to divide atmospheric backgrounds into two groups: the first group includes cloud classes, containing small-scale inhomogeneities of 1º – 2° in the vertical directions and of 1º – 3° in horizontal directions, such as altocumulus (Ac), cumulus (Cu), cirrocumulus (Cc) and cirrus (Ci), and altostratus (As); the second group includes cloud classes containing large-scale inhomogeneities of > 6° in the horizontal directions and > 3° in the vertical directions such as stratus (St), stratocumulus (Sc), and clear sky.
1. Allenov, A.M., Soloviev, V.A. Objective parameterization for the states of the cloudy atmosphere by the structure of its own radiation in the range of 8–13 μm [Ob”ektivnaya parametrizaciya sostoyanij oblachnoj atmosfery po strukture ee sobstvennogo izlucheniya v diapazone 8–13 mkm] // Optical Journal, 1999, Vol. 66, # 12, pp. 99–100.
2. Allenov, A.M., Soloviev, V.A. Correlation (spatial) connections between brightness fluctuations created by cloud irregularities in the range of 8–13 μm [Korrelyacionnye (prostranstvennye) svyazi mezhdu fluktuaciyami yarkosti, sozdavaemymi oblachnymi neodnorodnostyami v diapazone 8–13 mkm] // Proceedings of the IEM, Moscow: Gidrometeoizdat, 1995, # 25 (160), pp. 3–14.
3. Allenov, M.I. Structure of optical radiation of natural objects. [Struktura opticheskogo izlucheniya prirodnyh ob”ektov] / Moscow: Gidrometeoizdat, 1988, 164 p.
4. Allenov, A.M., Ivanova, N.P. Temporal variability of the spatial structure of sky radiation in the range of 8–13 μm under cumulus clouds [Vremennaya izmenchivost’ prostranstvennoj struktury izlucheniya neba v diapazone 8–13 mkm pri kuchevoj oblachnosti] // Optical Journal, 2001, Vol. 68, # 3. pp. 43–44.
5. Yakimenko, I. V., Smolin, V. A., Mishchenko, A.M. Results of studies of the spatial structure of atmospheric radiation in the spectral range of 1.5–2 μm [Rezul’taty issledovanij prostranstvennoj struktury izlucheniya atmosfery v spektral’nom diapazone 1.5–2 mkm] // Svetotekhnika, 2018, # 1, pp. 40–44.
6. Allenov, A.M., Bukhantsov, N.I., Gerasimov, V.V., Tretyakov, N.D. Scanning complex for measuring the spatial structure of atmospheric radiation in the range of 3–13 μm [Skaniruyushchij kompleks dlya izmereniya prostranstvennoj struktury izlucheniya atmosfery v oblasti 3–13 mkm] // Proceedings of the IEM, Moscow: Gidrometeoizdat, 1990, # 11 (132), pp. 54–61.
7. Alpatov, B.A., Blokhin, A.N., Muravyov, V.S. Image processing algorithm for automatic tracking systems of air objects [Algoritm obrabotki izobrazhenij dlya sistem avtomaticheskogo soprovozhdeniya vozdushnyh ob”ektov] // Digital signal processing, 2010, # 4.
8. Yakimenko, I.V. Methods, models and means of detecting air targets against the atmospheric background using wide-angle optical electronic systems: Monograph [Metody, modeli i sredstva obnaruzheniya vozdushnykh tseley na atmo-sfernom fone shirokougol’nymi optiko-elektronnymi sistemami: Monografiya] / St. Petersburg: Lan Publ., 2023, 168 p.
9. Smolin, V.A., Yakimenko, I.V., Rasskaza, D.S. Optical-information method for detecting unmanned aerial vehicles using a robotic optical-electronic system / [Optiko-informacionnyj metod obnaruzheniya bespilotnyh vozdushnyh sudov robotizirovannoj optiko-elektronnoj sistemoj] // GraphiCon 2022, 32nd International Conference on Computer Graphics and Machine Vision, September 19–22, 2022, Ryazan State Radio Engineering University named after V.F. Utkin, Ryazan, Russia, pp. 548–558.
10. Yakimenko, I.V., Yakimenko, Yu.I., Bobkov, V.I., Smolin, V.A. Optical Information Support for Artifact Detection robotic system on a complex background/ // Proceedings of International Symposium “Atmospheric Radiation and Dynamics” (ISARD‑2023), Saint-Petersburg State University, 2023. pp. 80–82.
11. Yakimenko, Yu.I., Bobkov V.I., Yakimenko I.V. Method for detecting artifacts on a complex background using an optical-electronic system [Metod obnaruzheniya artefaktov na slozhnom fone optiko-elektronnoj sistemoj] // Photonics, 2023, # 4, pp. 272–283.
12. Yakimenko, Yu.I., Astakhov, S.P., Yakimenko, I.V., Stolyarevskaya, R.I. Results of the study of spatio-temporal structures of cloud radiation in the LWIR range [Rezul’taty issledovaniya prostranstvenno-vremennyh struktur izlucheniya oblachnosti v LWIR diapazone] // Svetotekhnika, 2024, # 2, pp. 68–72.
13. https://www.unibelus.by/upload/files/ac7814c8–0cea‑11ea‑813e‑00155d045202.pdf

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• atmospheric background (AB)
• LWIR range
• spatial spectrum
• field of view