RT-13 VLBI Receivers

Evstigneev, A. A.; Chernov, V. K.; Evstigneeva, O. Eu.; Ipatova, I. A.; Khvostov, Eu. Yu.; Lavrov, Alexander; Pozdnyakov, I. A.; Vekshin, Yu. V.; Zotov, M. B.

doi:10.32876/applastron.55.36-40

Cited by 2 publications

(2 citation statements)

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“…Three different types of the receiving systems of the "Quasar" VLBI Network [1] were investigated in the work: the S/X receiving systems of the RT-32 radio telescope and the tri-band (S/X/Ka) and broadband (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16) receiving systems of the RT-13 radio telescope [2]. The receiving systems have a cryogenic unit, cooled to temperatures below 20 K, containing low-noise amplifiers, and for RT-13 the feed horn.…”

Section: Requirements For the Hardware-software Complexmentioning

confidence: 99%

“…The minimum delay deviation is 5 ps in the S band, 3.5 ps in the X band and 8 ps in the Ka band. We propose to choose the averaging time of a source signal in such a way that the calculated standard deviation of the delay (by formula (2)) is more than the Allan deviation of delay instability, since further increase in averaging time will increase the delay measurement error (Fig. 3).…”

Section: Pos(muto2022)003mentioning

confidence: 99%

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The Methods and a Hardware-Software Complex for Measuring the Stability of Radio Telescope Receiving Systems

Vekshin¹

2022

Proceedings of the Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022)

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Radio telescope sensitivity in radiometric observations and the accuracy of signal delay measurements in radio interferometric observations are largely determined by the amplitude and phase instability of the receiving equipment. To identify the sources of this instability, an urgent task is to create methods and equipment to measure the instability of the receiving system as a whole and its individual stages in particular. The paper presents a developed hardware-software complex, methods, and investigation of the amplitude and phase stability of the "Quasar" VLBI Network radio telescope receiving systems. The main sources of instability of the receiving systems and ways to improve their stability are determined. The measured RT-13 radio telescope characteristics obtained by the created hardware-software complex are presented. A method to determine the optimal signal averaging time of a radio interferometer has been developed, which reduces the error in determining the UT1−UTC corrections.

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