Performance Evaluation of Irbene RT-16 Radio Telescope Receiving System

Open access

Abstract

In the present paper, recent measurement results of refurbished Irbene RT-16 radio telescope receiving system performance are presented. The aim of the research is to evaluate characteristics of RT-16, which will allow carrying out necessary amplitude calibration in both single dish and VLBI observations, to improve the performance of existing system as well as to monitor, control and compare performance if possible changes in the receiving system will occur in future. The evaluated receiving system is 16 m Cassegrain antenna equipped with a cryogenic receiver with frequency range from 4.5 to 8.8 GHz, which is divided into four sub-bands. Multiple calibration sessions have been carried out by observing stable astronomical sources with known flux density by using in-house made total power registration backend. First, pointing offset calibration has been carried out and pointing model coefficients calculated and applied. Then, amplitude calibration, namely antenna sensitivity, calibration diode equivalent flux density and gain curve measurements have been carried out by observing calibration sources at different antenna elevations at each of the receiver sub-bands. Beam patterns have also been evaluated at different frequency bands. As a whole, acquired data will serve as a reference point for comparison in future performance evaluation of RT-16.

If the inline PDF is not rendering correctly, you can download the PDF file here.

  • 1. Himwich W. E. (1993). NVI Inc./GSFC Antenna Calibration Programs - VLBI Field System Documentation. NASA/Goddard Space Flight Center.

  • 2. Himwich W. E. (1993). NVI Inc./GSFC Pointing Model Derivation - VLBI Field System Documentation. NASA/Goddard Space Flight Center.

  • 3. Kraus A. (2013). MPIfR Calibration of Single Dish Telescopes. ERATec Workshop Bologna.

  • 4. Kraus A. (2007). MPIfR. Calibration of the Effelsberg 100m telescope.

  • 5. Perley R. A. & Butler B. J. (2013). An Accurate Flux Density Scale from 1 to 50 GHz. The Astrophysical Journal Supplement Series DOI: 10.1088/0067-0049/204/2/19

  • 6. MT Mechatronics. (2015). Report VTP2-DOC-11210-02: Assessment of the RT16 antenna surface performance and illumination efficiency.

Search
Journal information
Impact Factor


CiteScore 2018: 0.32

SCImago Journal Rank (SJR) 2018: 0.147
Source Normalized Impact per Paper (SNIP) 2018: 0.325

Cited By
Metrics
All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 214 109 3
PDF Downloads 104 68 4