Atmospheric Conditions within Big Telescope Alt-Azimuthal Region and Possibilities of Astronomical Observations

Shikhovtsev, A. Yu.; Kovadlo, P. G.; Хайкин, В. Б.; Nosov, V. V.; Лукин, В. П.; Nosov, E. V.; Torgaev, A. V.; Kiselev, Alexander V.; Shikhovtsev, Maxim Y.

doi:10.3390/rs14081833

Cited by 12 publications

(8 citation statements)

References 32 publications

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“…This conclusion presented here, obtained on the basis of direct measurements of the absorption of sub-THz waves, agrees well and is complemented by estimates made by indirect methods [17].…”

Section: Astroclimate Conditions At the Bta Site Of The Sao Rassupporting

confidence: 86%

Microwave Receiving System Based on Cryogenic Sensors for the Optical Big Telescope Alt-Azimuth

Balega,

Bubnov,

Chekushkin

et al. 2023

Preprint

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The article presents the results of evaluating the possibility of conducting radio astronomy studies in the windows of atmospheric transparency ~100, ~230 and ~350 GHz using the optical Big Telescope Alt-Azimuthal (BTA) of the SAO RAS. A list of some promising astronomical tasks is proposed. The astroclimat conditions at the BTA site and possible optical, cryogenic and mechanical interfaces for mounting a superconducting radio receiver at the focus of the optical telescope are considered. As a receiving system, arrays of detectors cooled to ~0.3 K based on the Superconductor – Insulator – Normal metal – Insulator – Superconductor (SINIS) structure are proposed. The implementation of the project will make it possible to use the BTA site of the SAO RAS not only to solve some astronomical problems (it is possible to consider the implementation of a single observatory, the VLBI mode in the Suffa, EHT and Millimetron projects), but will also be used to test various cryogenic detectors in a real observatory.

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Section: Astroclimate Conditions At the Bta Site Of The Sao Rassupporting

confidence: 86%

Microwave Receiving System Based on Cryogenic Sensors for the Optical Big Telescope Alt-Azimuth

Balega,

Bubnov,

Chekushkin

et al. 2023

Preprint

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show abstract

“…The conclusion presented here, obtained on the basis of our direct measurements of the absorption of sub-THz waves, agrees well and is complemented by estimates made by indirect methods [ 29 , 30 , 31 ] measured near the site of the BTA telescope.…”

Section: Astroclimate Conditions At the Bta Site Of The Sao Rassupporting

confidence: 85%

Microwave Receiving System Based on Cryogenic Sensors for the Optical Big Telescope Alt-Azimuth

Balega,

Bubnov,

Chekushkin

et al. 2024

Sensors

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This article presents the results of evaluating the possibility of conducting radio astronomy studies in the windows of atmospheric transparency ~100, ~230, and ~350 GHz using the optical Big Telescope Alt-Azimuthal (BTA) of the Special Astrophysical Observatory of the Russian Academy of Sciences (SAO RAS). A list of some promising astronomical tasks is proposed. The astroclimat conditions at the BTA site and possible optical, cryogenic, and mechanical interfaces for mounting a superconducting radio receiver at the focus of the optical telescope are considered. As a receiving system, arrays of detectors cooled to ~0.3 K based on the superconductor–insulator–normal metal–insulator–superconductor (SINIS) structure are proposed. The implementation of the project will make it possible to use the BTA site of the SAO RAS not only to solve some astronomical problems (it is possible to consider the implementation of a single observatory, the VLBI (very-long-baseline interferometry) mode in the Suffa, EHT (Event Horizon Telescope), and Millimetron projects), but it will also be used to test various cryogenic detectors in a real observatory.

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“…During summer and September, the instability of the atmosphere is significantly larger than other months, and the extremely low intensity in April indicates the most stable condition in all months. Using the radio-sounding data for January 2021 and July 2021, Artem obtained 1/Ri vertical profiles at Mineralnye Vody [39]. Comparing the two experimental results, 1/Ri has a larger value in the lower atmosphere; the difference is that there are multiple peaks between 2 km and 10 km at Mineralnye Vody, while the peak only appears above 10 km in the South China Sea.…”

Section: Turbulence Parameters Distribution and Seasonal Behaviormentioning

confidence: 98%

Analysis of Optical Turbulence over the South China Sea Using Balloon-Borne Microthermal Data and ERA5 Data

Shao

Weng

et al. 2022

Remote Sensing

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It is very useful for adaptive optics (AO) systems to have appropriate knowledge of optical turbulence. However, due to the limitations of space and time, it is difficult to obtain turbulence parameters, especially in the far sea area. In this paper, the characteristics of optical turbulence over the South China Sea are obtained by analyzing the meteorological data obtained from the field experiment of ocean optical parameters and the fifth set of reanalysis data of the European Centre for Medium-Range Weather Forecasts (ECMWF) for 10 years (2011–2020). Firstly, a new statistical model is proposed based on the measured data and the Hufnagel-Valley 5/7, which can well reconstruct the atmospheric turbulence characteristics of the South China Sea. Secondly, according to the comparison between the temperature and wind speed data in ERA5 data and microthermal measurement, the ERA5 data have good reliability, with the temperature deviation basically less than 1.5 K and the wind speed deviation basically less than 2 m∙s−1. Thirdly, the vertical distributions and seasonal behavior of the turbulence strength at the determined location are analyzed, which shows that the turbulence strength in the upper atmosphere is strongest in summer, followed by autumn and winter, and weakest in spring. Then, the distribution profile of the Richardson number provides us with the relative probability of the existence of optical turbulence. During summer and September, the instability of the atmosphere is significantly larger than other months and the extremely low intensity in April indicates the most stable condition in all months. Finally, the analysis results of turbulence parameter profiles for many years show that there is good consistency between different parameters.

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Atmospheric Conditions within Big Telescope Alt-Azimuthal Region and Possibilities of Astronomical Observations

Cited by 12 publications

References 32 publications

Microwave Receiving System Based on Cryogenic Sensors for the Optical Big Telescope Alt-Azimuth

Microwave Receiving System Based on Cryogenic Sensors for the Optical Big Telescope Alt-Azimuth

Microwave Receiving System Based on Cryogenic Sensors for the Optical Big Telescope Alt-Azimuth

Analysis of Optical Turbulence over the South China Sea Using Balloon-Borne Microthermal Data and ERA5 Data

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