Estimation of errors at the calibration of spectral data at the irbene RT-32 radio telescope

O. Antyufeyev; M. Bleiders; O. Patoka; V. Bezrukovs; A. Aberfelds; I. Shmeld; A. Orbidans; J. Steinbergs; V. Shulga

Estimation of errors at the calibration of spectral data at the irbene RT-32 radio telescope

O. Antyufeyev^*
, M. Bleiders
, O. Patoka
, V. Bezrukovs
, A. Aberfelds
, I. Shmeld
, A. Orbidans
, J. Steinbergs
, V. Shulga

^*Corresponding author for this work

Ventspils University College
NASU - Institute of Radio Astronomy
Jilin University

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

We analyze calibration errors that occur during the single-dish observations at the Irbene RT-32 radio telescope when calibration is done using noise diode. Only frequencyswitched mode of spectral line observations is considered. The purpose of the article is to find possible values of noise diode temperature T_cal and period of switching oscillator frequency 2t_q. For this, we have analyzed the formula for calculating the antenna temperature of the source. It is shown that noise diode temperature affects the standard deviation of source antenna temperature σT_s and the error of source antenna temperature δT_s caused by instability of system temperature. t_q affects the stability of the characteristics of the receiving system. In this article, the dependencies between T_cal, t_q, σT_s and δT_s were found and analyzed. Based on these dependencies, possible values of T_cal and t_q are found.

Original language	English
Pages (from-to)	23-38
Number of pages	16
Journal	Astronomical and Astrophysical Transactions
Volume	32
Issue number	1
Publication status	Published - 2020
Externally published	Yes

Keywords

Calibration
Radio telescope
Single-dish
Spectral observation

Cite this

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title = "Estimation of errors at the calibration of spectral data at the irbene RT-32 radio telescope",

abstract = "We analyze calibration errors that occur during the single-dish observations at the Irbene RT-32 radio telescope when calibration is done using noise diode. Only frequencyswitched mode of spectral line observations is considered. The purpose of the article is to find possible values of noise diode temperature Tcal and period of switching oscillator frequency 2tq. For this, we have analyzed the formula for calculating the antenna temperature of the source. It is shown that noise diode temperature affects the standard deviation of source antenna temperature σTs and the error of source antenna temperature δTs caused by instability of system temperature. tq affects the stability of the characteristics of the receiving system. In this article, the dependencies between Tcal, tq, σTs and δTs were found and analyzed. Based on these dependencies, possible values of Tcal and tq are found.",

keywords = "Calibration, Radio telescope, Single-dish, Spectral observation",

author = "O. Antyufeyev and M. Bleiders and O. Patoka and V. Bezrukovs and A. Aberfelds and I. Shmeld and A. Orbidans and J. Steinbergs and V. Shulga",

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journal = "Astronomical and Astrophysical Transactions",

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TY - JOUR

T1 - Estimation of errors at the calibration of spectral data at the irbene RT-32 radio telescope

AU - Antyufeyev, O.

AU - Bleiders, M.

AU - Patoka, O.

AU - Bezrukovs, V.

AU - Aberfelds, A.

AU - Shmeld, I.

AU - Orbidans, A.

AU - Steinbergs, J.

AU - Shulga, V.

PY - 2020

Y1 - 2020

N2 - We analyze calibration errors that occur during the single-dish observations at the Irbene RT-32 radio telescope when calibration is done using noise diode. Only frequencyswitched mode of spectral line observations is considered. The purpose of the article is to find possible values of noise diode temperature Tcal and period of switching oscillator frequency 2tq. For this, we have analyzed the formula for calculating the antenna temperature of the source. It is shown that noise diode temperature affects the standard deviation of source antenna temperature σTs and the error of source antenna temperature δTs caused by instability of system temperature. tq affects the stability of the characteristics of the receiving system. In this article, the dependencies between Tcal, tq, σTs and δTs were found and analyzed. Based on these dependencies, possible values of Tcal and tq are found.

AB - We analyze calibration errors that occur during the single-dish observations at the Irbene RT-32 radio telescope when calibration is done using noise diode. Only frequencyswitched mode of spectral line observations is considered. The purpose of the article is to find possible values of noise diode temperature Tcal and period of switching oscillator frequency 2tq. For this, we have analyzed the formula for calculating the antenna temperature of the source. It is shown that noise diode temperature affects the standard deviation of source antenna temperature σTs and the error of source antenna temperature δTs caused by instability of system temperature. tq affects the stability of the characteristics of the receiving system. In this article, the dependencies between Tcal, tq, σTs and δTs were found and analyzed. Based on these dependencies, possible values of Tcal and tq are found.

KW - Calibration

KW - Radio telescope

KW - Single-dish

KW - Spectral observation

UR - https://www.scopus.com/pages/publications/85105419963

M3 - Article

AN - SCOPUS:85105419963

SN - 1055-6796

VL - 32

SP - 23

EP - 38

JO - Astronomical and Astrophysical Transactions

JF - Astronomical and Astrophysical Transactions

IS - 1

ER -

Estimation of errors at the calibration of spectral data at the irbene RT-32 radio telescope

Abstract

Keywords

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