1. RadioAstron project: calibration of the space radio telescope in flight in 2011–2019
- Author
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P. Tsubulev, G. Zhekanis, N. Nizhelsky, A. Kovalenko, K. Belousov, N. Shakhvorostova, A. Alakoz, A. Kutjkin, P. Voitsik, Yu.Yu. Kovalev, M. Burgin, E. Mironova, N. Nikolaev, M. Larionov, V. Soglasnov, M. Popov, M. Lisakov, E. Vinyaikin, A. Ermakov, V. Vasil‘kov, and Yu.A. Kovalev
- Abstract
We present results of amplitude calibration of the RadioAstron Space Radio Telescope (SRT) at wavelenghts of 1.35, 6.2,18, and 92 cm. Flux density calibrated internal noise signals and SEFDs are found to be stable within the errors at thelevel of 3–13%. We have used the flux density scale by Baars et al. (1977). The known issue of the variability of calibratorswas resolved performing comparison with two other flux density scales. We have resolved the issue by averaging SRT noisediode signals measured relative to Cassiopea A and Crab Nebula.
- Published
- 2022
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