A modified tipping-curve method in the comparative study of sites for space communications and radio astronomy systems in the millimeter wavelength range

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Measurements of atmospheric absorption in transparency windows in the range of millimeter waves (MMW) have been carried out. A modification tipping-curve method is proposed that allows measuring atmospheric absorption, the average temperature of the atmosphere and separating the contributions of atmospheric moisture and the droplet fraction of clouds by single-wave measurements in the MMV range with clouds up to 2.5 points (without precipitation). The possibility of detecting and determining the water content of clouds at the zenith in real time is shown. The annual course of atmospheric moisture content and atmospheric absorption at a wavelength of 3 mm (2019 and 2020–2021) for the Karadag landfill. The previously obtained results of a comparative analysis of the Karadag landfill and the Suffa plateau are confirmed. The possibility of using the Karadag landfill for the installation of space communication systems and measurements of space sources in the MMV range is shown.

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作者简介

I. Bubukin

N. I. Lobachevsky State University of Nizhny Novgorod

编辑信件的主要联系方式.
Email: bubn@nirfi.unn.ru

Radiophysical Research Institute

俄罗斯联邦, Nizhny Novgorod

I. Rakut

N. I. Lobachevsky State University of Nizhny Novgorod; Nizhny Novgorod State Technical University name after R. E. Alekseev

Email: bubn@nirfi.unn.ru

Radiophysical Research Institute

俄罗斯联邦, Nizhny Novgorod; Nizhny Novgorod

M. Agafonov

N. I. Lobachevsky State University of Nizhny Novgorod; Nizhny Novgorod State Technical University name after R. E. Alekseev

Email: bubn@nirfi.unn.ru

Radiophysical Research Institute

俄罗斯联邦, Nizhny Novgorod; Nizhny Novgorod

A. Pankratov

N. I. Lobachevsky State University of Nizhny Novgorod; Nizhny Novgorod State Technical University name after R. E. Alekseev; Institute for Physics of Microstructures, Russian Academy of Sciences

Email: bubn@nirfi.unn.ru

Radiophysical Research Institute

俄罗斯联邦, Nizhny Novgorod; Nizhny Novgorod; Academicheskaya Str., 7, Nizhny Novgorod, 603087

T. Gorbunova

Institute for Biology of the South Seas n. a. A. O. Kovalevsky, Russian Academy of Sciences

Email: bubn@nirfi.unn.ru
俄罗斯联邦, Nakhimov Ave., 2, Sevastopol, 299011

R. Gorbunov

Institute for Biology of the South Seas n. a. A. O. Kovalevsky, Russian Academy of Sciences

Email: bubn@nirfi.unn.ru
俄罗斯联邦, Nakhimov Ave., 2, Sevastopol, 299011

V. Bubukin

Nizhny Novgorod State Technical University name after R. E. Alekseev

Email: bubn@nirfi.unn.ru
俄罗斯联邦, Nizhny Novgorod

参考

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2. Fig. 1. Dependences of the difference between the antenna and brightness temperatures of the atmosphere on the zenith angle for a 7° diagram and three absorption values ​​of 0.1 (1), 0.3 (2) and 0.9 (3).

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3. Fig. 2. Average monthly atmospheric moisture content Q with cloudiness less than 2.5 points for Suffa for 1981–1991 (1), for the Karadag test site from August to December 2019 [4] (2), from August to December 2020 (3), from January to August 2021 (4). The right scale is measurements of atmospheric absorption in the 3 mm range for the Karadag test site (2–4), the left scale is the integral moisture content for Suffa (1) and Karadag (2–4).

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4. Fig. 3. Histogram of the distribution of integral atmospheric moisture content values ​​Q (g/cm2), obtained on March 7–8, 2021 at a wavelength of 3 mm.

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5. Fig. 4. Atmospheric moisture content Q (1), cloud water content W (2) based on measurements at a wavelength of 3 mm, and the proportion of the sky covered by clouds based on meteorological data Nоб (3), obtained on March 7–8, 2021.

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6. Fig. 5. Surface T0 (1) and average Tcp (2) atmospheric temperatures based on measurements taken on March 7–8, 2021, at a wavelength of 3 mm.

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7. Fig. 6. Water vapor layer thickness hW(1) and atmospheric surface temperature T0 (2) based on measurements taken on March 7–8, 2021, at a wavelength of 3 mm.

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